From 58b4af950d081664b4ca8de8c556aa8269b71a07 Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Tue, 3 Mar 2026 18:26:48 +0000
Subject: [PATCH 01/15] feat: add mock-module-exports

---
 recipes/mock-module-exports/README.md         |   4 +
 recipes/mock-module-exports/codemod.yaml      |  21 ++++
 recipes/mock-module-exports/package.json      |  24 ++++
 recipes/mock-module-exports/src/workflow.ts   | 105 ++++++++++++++++++
 .../tests/basic/expected.mjs                  |   8 ++
 .../mock-module-exports/tests/basic/input.mjs |   8 ++
 .../tests/without-default-export/expected.mjs |   7 ++
 .../tests/without-default-export/input.mjs    |   7 ++
 .../tests/without-named-export/expected.mjs   |   7 ++
 .../tests/without-named-export/input.mjs      |   5 +
 recipes/mock-module-exports/workflow.yaml     |  25 +++++
 11 files changed, 221 insertions(+)
 create mode 100644 recipes/mock-module-exports/README.md
 create mode 100644 recipes/mock-module-exports/codemod.yaml
 create mode 100644 recipes/mock-module-exports/package.json
 create mode 100644 recipes/mock-module-exports/src/workflow.ts
 create mode 100644 recipes/mock-module-exports/tests/basic/expected.mjs
 create mode 100644 recipes/mock-module-exports/tests/basic/input.mjs
 create mode 100644 recipes/mock-module-exports/tests/without-default-export/expected.mjs
 create mode 100644 recipes/mock-module-exports/tests/without-default-export/input.mjs
 create mode 100644 recipes/mock-module-exports/tests/without-named-export/expected.mjs
 create mode 100644 recipes/mock-module-exports/tests/without-named-export/input.mjs
 create mode 100644 recipes/mock-module-exports/workflow.yaml

diff --git a/recipes/mock-module-exports/README.md b/recipes/mock-module-exports/README.md
new file mode 100644
index 00000000..69208808
--- /dev/null
+++ b/recipes/mock-module-exports/README.md
@@ -0,0 +1,4 @@
+# Mock Module Exports
+
+This codemod helps migrate code that uses mock.module.
+
diff --git a/recipes/mock-module-exports/codemod.yaml b/recipes/mock-module-exports/codemod.yaml
new file mode 100644
index 00000000..e062f733
--- /dev/null
+++ b/recipes/mock-module-exports/codemod.yaml
@@ -0,0 +1,21 @@
+schema_version: "1.0"
+name: "@nodejs/mock-module-exports"
+version: 1.0.0
+description: ""
+author: Bruno Rodrigues
+license: MIT
+workflow: workflow.yaml
+category: migration
+
+targets:
+  languages:
+    - javascript
+    - typescript
+
+keywords:
+  - transformation
+  - migration
+
+registry:
+  access: public
+  visibility: public
diff --git a/recipes/mock-module-exports/package.json b/recipes/mock-module-exports/package.json
new file mode 100644
index 00000000..15b78f43
--- /dev/null
+++ b/recipes/mock-module-exports/package.json
@@ -0,0 +1,24 @@
+{
+  "name": "@nodejs/mock-module-exports",
+  "version": "1.0.1",
+  "description": "",
+  "type": "module",
+  "scripts": {
+    "test": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/nodejs/userland-migrations.git",
+    "directory": "recipes/util-is",
+    "bugs": "https://github.com/nodejs/userland-migrations/issues"
+  },
+  "author": "Bruno Rodrigues",
+  "license": "MIT",
+  "homepage": "https://github.com/nodejs/userland-migrations/blob/main/recipes/mock-module-exports/README.md",
+  "devDependencies": {
+    "@codemod.com/jssg-types": "^1.3.1"
+  },
+  "dependencies": {
+    "@nodejs/codemod-utils": "0.0.0"
+  }
+}
diff --git a/recipes/mock-module-exports/src/workflow.ts b/recipes/mock-module-exports/src/workflow.ts
new file mode 100644
index 00000000..0afca1d0
--- /dev/null
+++ b/recipes/mock-module-exports/src/workflow.ts
@@ -0,0 +1,105 @@
+import type { SgRoot, Edit, SgNode } from '@codemod.com/jssg-types/main';
+import type JS from '@codemod.com/jssg-types/langs/javascript';
+import { getModuleDependencies } from '@nodejs/codemod-utils/ast-grep/module-dependencies';
+import { resolveBindingPath } from '@nodejs/codemod-utils/ast-grep/resolve-binding-path';
+import {
+	detectIndentUnit,
+	getLineIndent,
+} from '@nodejs/codemod-utils/ast-grep/indent';
+import { EOL } from 'node:os';
+
+export default function transform(root: SgRoot<JS>): string | null {
+	const rootNode = root.root();
+	const edits: Edit[] = [];
+
+	const deps = getModuleDependencies(root, 'test');
+	let moduleFnCalls: SgNode<JS, 'call_expression'>[] = [];
+
+	for (const dep of deps) {
+		const moduleFn = resolveBindingPath(dep, '$.mock.module');
+
+		const fnCallNodes = rootNode.findAll<'call_expression'>({
+			rule: {
+				kind: 'call_expression',
+				has: {
+					any: [
+						{
+							kind: 'member_expression',
+							pattern: moduleFn,
+						},
+					],
+					// handle others
+				},
+			},
+		});
+
+		moduleFnCalls = moduleFnCalls.concat(fnCallNodes);
+	}
+
+	for (const moduleFnCall of moduleFnCalls) {
+		const argumentsNode = moduleFnCall.field<'arguments'>('arguments');
+		const args = argumentsNode.children().filter((node) => node.isNamed());
+
+		if (args.length < 2) continue;
+		const optionsArg = args[1];
+		const indentUnit = detectIndentUnit(rootNode.text());
+		const pairs = [];
+
+		if (optionsArg.is('object')) {
+			const defaultExport = optionsArg.find<'pair'>({
+				rule: {
+					kind: 'pair',
+					has: {
+						field: 'key',
+						kind: 'property_identifier',
+						regex: 'defaultExport',
+					},
+				},
+			});
+
+			if (defaultExport) {
+				pairs.push(`default: ${defaultExport?.field('value').text()}`);
+			}
+
+			const namedExport = optionsArg.find<'pair'>({
+				rule: {
+					kind: 'pair',
+					has: {
+						field: 'key',
+						kind: 'property_identifier',
+						regex: 'namedExport',
+					},
+				},
+			});
+
+			if (namedExport) {
+				for (const namedPair of namedExport.field('value').children()) {
+					if (!namedPair.is('pair')) continue;
+					pairs.push(namedPair.text());
+				}
+			}
+
+			const indentLevel = getLineIndent(
+				rootNode.text(),
+				optionsArg.range().start.index,
+			);
+
+			const exportsLevel = `${indentLevel}${indentUnit}`;
+			const innerExports = `${exportsLevel}${indentUnit}`;
+
+			const newValue =
+				`{${EOL}` +
+				`${exportsLevel}exports: {${EOL}` +
+				`${innerExports}${pairs.join(`,${EOL}${innerExports}`)}` +
+				`,${EOL}` +
+				`${exportsLevel}},${EOL}` +
+				`${indentLevel}}`;
+
+			edits.push(optionsArg.replace(newValue));
+		}
+	}
+
+	let sourceCode = rootNode.commitEdits(edits);
+
+	return sourceCode;
+}
diff --git a/recipes/mock-module-exports/tests/basic/expected.mjs b/recipes/mock-module-exports/tests/basic/expected.mjs
new file mode 100644
index 00000000..5eaa856f
--- /dev/null
+++ b/recipes/mock-module-exports/tests/basic/expected.mjs
@@ -0,0 +1,8 @@
+import { mock } from 'node:test';
+
+mock.module('example', {
+	exports: {
+		default: 'bar',
+		foo: 'foo',
+	},
+});
diff --git a/recipes/mock-module-exports/tests/basic/input.mjs b/recipes/mock-module-exports/tests/basic/input.mjs
new file mode 100644
index 00000000..74a3d627
--- /dev/null
+++ b/recipes/mock-module-exports/tests/basic/input.mjs
@@ -0,0 +1,8 @@
+import { mock } from 'node:test';
+
+mock.module('example', {
+	defaultExport: 'bar',
+	namedExports: {
+		foo: 'foo',
+	},
+});
diff --git a/recipes/mock-module-exports/tests/without-default-export/expected.mjs b/recipes/mock-module-exports/tests/without-default-export/expected.mjs
new file mode 100644
index 00000000..59923414
--- /dev/null
+++ b/recipes/mock-module-exports/tests/without-default-export/expected.mjs
@@ -0,0 +1,7 @@
+import { mock } from 'node:test';
+
+mock.module('example', {
+	exports: {
+		foo: 'foo',
+	},
+});
diff --git a/recipes/mock-module-exports/tests/without-default-export/input.mjs b/recipes/mock-module-exports/tests/without-default-export/input.mjs
new file mode 100644
index 00000000..d82e8ced
--- /dev/null
+++ b/recipes/mock-module-exports/tests/without-default-export/input.mjs
@@ -0,0 +1,7 @@
+import { mock } from 'node:test';
+
+mock.module('example', {
+	namedExports: {
+		foo: 'foo',
+	},
+});
diff --git a/recipes/mock-module-exports/tests/without-named-export/expected.mjs b/recipes/mock-module-exports/tests/without-named-export/expected.mjs
new file mode 100644
index 00000000..322cb8c8
--- /dev/null
+++ b/recipes/mock-module-exports/tests/without-named-export/expected.mjs
@@ -0,0 +1,7 @@
+import { mock } from 'node:test';
+
+mock.module('example', {
+	exports: {
+		default: 'bar',
+	},
+});
diff --git a/recipes/mock-module-exports/tests/without-named-export/input.mjs b/recipes/mock-module-exports/tests/without-named-export/input.mjs
new file mode 100644
index 00000000..10e46bdd
--- /dev/null
+++ b/recipes/mock-module-exports/tests/without-named-export/input.mjs
@@ -0,0 +1,5 @@
+import { mock } from 'node:test';
+
+mock.module('example', {
+	defaultExport: 'bar',
+});
diff --git a/recipes/mock-module-exports/workflow.yaml b/recipes/mock-module-exports/workflow.yaml
new file mode 100644
index 00000000..61c35e95
--- /dev/null
+++ b/recipes/mock-module-exports/workflow.yaml
@@ -0,0 +1,25 @@
+version: "1"
+
+nodes:
+  - id: apply-transforms
+    name: Apply AST Transformations
+    type: automatic
+    runtime:
+      type: direct
+    steps:
+      - name: ""
+        js-ast-grep:
+          js_file: src/workflow.ts
+          base_path: .
+          include:
+            - "**/*.js"
+            - "**/*.jsx"
+            - "**/*.mjs"
+            - "**/*.cjs"
+            - "**/*.cts"
+            - "**/*.mts"
+            - "**/*.ts"
+            - "**/*.tsx"
+          exclude:
+            - "**/node_modules/**"
+          language: typescript

From 86f4fff7272ef88b7b1aad11fc9cb5ff04e7642c Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Tue, 3 Mar 2026 18:34:45 +0000
Subject: [PATCH 02/15] add extra test case

---
 recipes/mock-module-exports/src/workflow.ts          | 12 +++++-------
 .../tests/esm-default-import/expected.mjs            |  8 ++++++++
 .../tests/esm-default-import/input.mjs               |  8 ++++++++
 3 files changed, 21 insertions(+), 7 deletions(-)
 create mode 100644 recipes/mock-module-exports/tests/esm-default-import/expected.mjs
 create mode 100644 recipes/mock-module-exports/tests/esm-default-import/input.mjs

diff --git a/recipes/mock-module-exports/src/workflow.ts b/recipes/mock-module-exports/src/workflow.ts
index 0afca1d0..4ddb40c3 100644
--- a/recipes/mock-module-exports/src/workflow.ts
+++ b/recipes/mock-module-exports/src/workflow.ts
@@ -28,7 +28,6 @@ export default function transform(root: SgRoot<JS>): string | null {
 							pattern: moduleFn,
 						},
 					],
-					// handle others
 				},
 			},
 		});
@@ -88,12 +87,11 @@ export default function transform(root: SgRoot<JS>): string | null {
 			const innerExports = `${exportsLevel}${indentUnit}`;
 
 			const newValue =
-				`{${EOL}` +
-				`${exportsLevel}exports: {${EOL}` +
-				`${innerExports}${pairs.join(`,${EOL}${innerExports}`)}` +
-				`,${EOL}` +
-				`${exportsLevel}},${EOL}` +
-				`${indentLevel}}`;
+				`{${EOL}`
+				+ `${exportsLevel}exports: {${EOL}`
+				+ `${innerExports}${pairs.join(`,${EOL}${innerExports}`)}` + `,${EOL}`
+				+ `${exportsLevel}},${EOL}`
+				+ `${indentLevel}}`;
 
 			edits.push(optionsArg.replace(newValue));
 		}
diff --git a/recipes/mock-module-exports/tests/esm-default-import/expected.mjs b/recipes/mock-module-exports/tests/esm-default-import/expected.mjs
new file mode 100644
index 00000000..c46c9f9d
--- /dev/null
+++ b/recipes/mock-module-exports/tests/esm-default-import/expected.mjs
@@ -0,0 +1,8 @@
+import test from 'node:test';
+
+test.mock.module('example', {
+	exports: {
+		default: 'bar',
+		foo: 'foo',
+	},
+});
diff --git a/recipes/mock-module-exports/tests/esm-default-import/input.mjs b/recipes/mock-module-exports/tests/esm-default-import/input.mjs
new file mode 100644
index 00000000..74149ec9
--- /dev/null
+++ b/recipes/mock-module-exports/tests/esm-default-import/input.mjs
@@ -0,0 +1,8 @@
+import test from 'node:test';
+
+test.mock.module('example', {
+	defaultExport: 'bar',
+	namedExports: {
+		foo: 'foo',
+	},
+});

From 327691c0a4b303d9ff4367c07763d3f183e6c81c Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Sat, 14 Mar 2026 13:54:49 +0000
Subject: [PATCH 03/15] feat: add support to replace variables

---
 recipes/mock-module-exports/package.json      |   3 +-
 recipes/mock-module-exports/src/workflow.ts   | 207 ++++++++++++++----
 .../tests/option-as-variable/expected.mjs     |  10 +
 .../tests/option-as-variable/input.mjs        |  10 +
 4 files changed, 181 insertions(+), 49 deletions(-)
 create mode 100644 recipes/mock-module-exports/tests/option-as-variable/expected.mjs
 create mode 100644 recipes/mock-module-exports/tests/option-as-variable/input.mjs

diff --git a/recipes/mock-module-exports/package.json b/recipes/mock-module-exports/package.json
index 15b78f43..bcbccc09 100644
--- a/recipes/mock-module-exports/package.json
+++ b/recipes/mock-module-exports/package.json
@@ -4,7 +4,8 @@
   "description": "",
   "type": "module",
   "scripts": {
-    "test": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/"
+    "test": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/",
+    "testu": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/ --filter \"option-as-variable\""
   },
   "repository": {
     "type": "git",
diff --git a/recipes/mock-module-exports/src/workflow.ts b/recipes/mock-module-exports/src/workflow.ts
index 4ddb40c3..825b89c8 100644
--- a/recipes/mock-module-exports/src/workflow.ts
+++ b/recipes/mock-module-exports/src/workflow.ts
@@ -1,4 +1,4 @@
-import type { SgRoot, Edit, SgNode } from '@codemod.com/jssg-types/main';
+import type { SgRoot, Edit, SgNode, Kinds } from '@codemod.com/jssg-types/main';
 import type JS from '@codemod.com/jssg-types/langs/javascript';
 import { getModuleDependencies } from '@nodejs/codemod-utils/ast-grep/module-dependencies';
 import { resolveBindingPath } from '@nodejs/codemod-utils/ast-grep/resolve-binding-path';
@@ -8,6 +8,136 @@ import {
 } from '@nodejs/codemod-utils/ast-grep/indent';
 import { EOL } from 'node:os';
 
+type QueueEvent = {
+	event: keyof typeof parsers;
+	handler: () => Edit[];
+};
+
+const queue: QueueEvent[] = [];
+
+type Pair = {
+	before: SgNode<JS, 'pair'>;
+	after: string;
+};
+
+type ExportedValue = {
+	node: SgNode<JS, Kinds<JS>>;
+	default: Pair;
+	named: Pair[] | undefined;
+};
+const exportedValues: Map<number, ExportedValue> = new Map();
+
+type Parsers = {
+	parseOptions: (optionsNode: SgNode<JS, Kinds<JS>>) => undefined;
+	defaultExport: (node: SgNode<JS, Kinds<JS>>) => Edit[];
+	resolveVariables: (node: SgNode<JS, Kinds<JS>>) => undefined;
+	namedExports: (optionsNode: SgNode<JS, Kinds<JS>>) => Edit[];
+};
+
+const parsers: Parsers = {
+	parseOptions: (optionsNode: SgNode<JS, Kinds<JS>>): undefined => {
+		switch (optionsNode.kind()) {
+			case 'object':
+				queue.unshift({
+					event: 'defaultExport',
+					handler: () => parsers.defaultExport(optionsNode),
+				});
+				queue.unshift({
+					event: 'namedExports',
+					handler: () => parsers.namedExports(optionsNode),
+				});
+			case 'identifier':
+				queue.unshift({
+					event: 'resolveVariables',
+					handler: () => parsers.resolveVariables(optionsNode),
+				});
+		}
+	},
+	resolveVariables: (node: SgNode<JS, Kinds<JS>>) => {
+		const definition = node.definition();
+		if (!definition) return;
+
+		switch (definition.node.parent().kind()) {
+			case 'variable_declarator':
+				const parent = definition.node.parent<'variable_declarator'>();
+				queue.unshift({
+					event: 'parseOptions',
+					handler: () => parsers.parseOptions(parent.field('value')),
+				});
+				break;
+			default:
+				throw new Error('unhandled scenario');
+		}
+	},
+	defaultExport: (node: SgNode<JS, Kinds<JS>>): Edit[] => {
+		const edits: Edit[] = [];
+		const defaultExport = node.find<'pair'>({
+			rule: {
+				kind: 'pair',
+				has: {
+					field: 'key',
+					kind: 'property_identifier',
+					regex: 'defaultExport',
+				},
+			},
+		});
+		if (defaultExport) {
+			const change = {
+				before: defaultExport,
+				after: `default: ${defaultExport?.field('value').text()}`,
+			};
+
+			if (!exportedValues.has(node.id())) {
+				exportedValues.set(node.id(), {
+					node,
+					default: change,
+					named: [],
+				});
+				return;
+			}
+
+			const n = exportedValues.get(node.id());
+			n.default = change;
+		}
+		return edits;
+	},
+	namedExports: (node: SgNode<JS, Kinds<JS>>): Edit[] => {
+		const edits: Edit[] = [];
+		const namedExport = node.find<'pair'>({
+			rule: {
+				kind: 'pair',
+				has: {
+					field: 'key',
+					kind: 'property_identifier',
+					regex: 'namedExport',
+				},
+			},
+		});
+
+		if (namedExport) {
+			if (!exportedValues.has(node.id())) {
+				exportedValues.set(node.id(), {
+					node,
+					default: undefined,
+					named: [],
+				});
+			}
+
+			const pairs = exportedValues.get(node.id()).named;
+
+			for (const namedPair of namedExport.field('value').children()) {
+				if (!namedPair.is('pair')) continue;
+
+				pairs.push({
+					before: namedPair,
+					after: namedPair.text(),
+				});
+			}
+		}
+		return edits;
+	},
+};
+
 export default function transform(root: SgRoot<JS>): string | null {
 	const rootNode = root.root();
 	const edits: Edit[] = [];
@@ -41,60 +171,41 @@ export default function transform(root: SgRoot<JS>): string | null {
 
 		if (args.length < 2) continue;
 		const optionsArg = args[1];
-		const indentUnit = detectIndentUnit(rootNode.text());
-		const pairs = [];
-
-		if (optionsArg.is('object')) {
-			const defaultExport = optionsArg.find<'pair'>({
-				rule: {
-					kind: 'pair',
-					has: {
-						field: 'key',
-						kind: 'property_identifier',
-						regex: 'defaultExport',
-					},
-				},
-			});
-
-			if (defaultExport) {
-				pairs.push(`default: ${defaultExport?.field('value').text()}`);
-			}
+		queue.unshift({
+			event: 'parseOptions',
+			handler: () => parsers.parseOptions(optionsArg),
+		});
+	}
 
-			const namedExport = optionsArg.find<'pair'>({
-				rule: {
-					kind: 'pair',
-					has: {
-						field: 'key',
-						kind: 'property_identifier',
-						regex: 'namedExport',
-					},
-				},
-			});
+	const indentUnit = detectIndentUnit(rootNode.text());
+	while (queue.length) {
+		const event = queue.at(-1);
+		event.handler();
+		queue.pop();
+	}
 
-			if (namedExport) {
-				for (const namedPair of namedExport.field('value').children()) {
-					if (!namedPair.is('pair')) continue;
-					pairs.push(namedPair.text());
-				}
-			}
+	for (const [_nodeId, change] of Array.from(exportedValues)) {
+		const indentLevel = getLineIndent(
+			rootNode.text(),
+			change.node.range().start.index,
+		);
 
-			const indentLevel = getLineIndent(
-				rootNode.text(),
-				optionsArg.range().start.index,
-			);
+		const exportsLevel = `${indentLevel}${indentUnit}`;
+		const innerExports = `${exportsLevel}${indentUnit}`;
 
-			const exportsLevel = `${indentLevel}${indentUnit}`;
-			const innerExports = `${exportsLevel}${indentUnit}`;
+		let newValue = `{${EOL}` + `${exportsLevel}exports: {${EOL}`;
 
-			const newValue =
-				`{${EOL}`
-				+ `${exportsLevel}exports: {${EOL}`
-				+ `${innerExports}${pairs.join(`,${EOL}${innerExports}`)}` + `,${EOL}`
-				+ `${exportsLevel}},${EOL}`
-				+ `${indentLevel}}`;
+		if (change.default?.after) {
+			newValue += `${innerExports}${change.default.after},${EOL}`;
+		}
 
-			edits.push(optionsArg.replace(newValue));
+		if (change.named?.length) {
+			newValue += `${innerExports}${change.named.map((t) => t.after).join(`,${EOL}${innerExports}`)},${EOL}`;
 		}
+
+		newValue += `${exportsLevel}},${EOL}` + `${indentLevel}}`;
+
+		edits.push(change.node.replace(newValue));
 	}
 
 	let sourceCode = rootNode.commitEdits(edits);
diff --git a/recipes/mock-module-exports/tests/option-as-variable/expected.mjs b/recipes/mock-module-exports/tests/option-as-variable/expected.mjs
new file mode 100644
index 00000000..572a2e7b
--- /dev/null
+++ b/recipes/mock-module-exports/tests/option-as-variable/expected.mjs
@@ -0,0 +1,10 @@
+import { mock } from 'node:test';
+
+const mockValues = {
+	exports: {
+		default: 'bar',
+		foo: 'foo',
+	},
+}
+
+mock.module('example', mockValues);
diff --git a/recipes/mock-module-exports/tests/option-as-variable/input.mjs b/recipes/mock-module-exports/tests/option-as-variable/input.mjs
new file mode 100644
index 00000000..bb2f95ad
--- /dev/null
+++ b/recipes/mock-module-exports/tests/option-as-variable/input.mjs
@@ -0,0 +1,10 @@
+import { mock } from 'node:test';
+
+const mockValues = {
+	defaultExport: 'bar',
+	namedExports: {
+		foo: 'foo',
+	},
+}
+
+mock.module('example', mockValues);

From 472a0d44e99b5e9d19d71627e72a644f8bd8f817 Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Sat, 14 Mar 2026 14:56:53 +0000
Subject: [PATCH 04/15] feat: add destructuring basic support

---
 recipes/mock-module-exports/package.json      |  2 +-
 recipes/mock-module-exports/src/workflow.ts   | 25 ++++++++++++++++++-
 .../tests/basic/expected.mjs                  |  1 +
 .../mock-module-exports/tests/basic/input.mjs |  1 +
 .../tests/destructuring-example/expected.mjs  | 16 ++++++++++++
 .../tests/destructuring-example/input.mjs     | 16 ++++++++++++
 .../tests/esm-default-import/expected.mjs     |  7 ++++--
 .../tests/esm-default-import/input.mjs        |  7 ++++--
 8 files changed, 69 insertions(+), 6 deletions(-)
 create mode 100644 recipes/mock-module-exports/tests/destructuring-example/expected.mjs
 create mode 100644 recipes/mock-module-exports/tests/destructuring-example/input.mjs

diff --git a/recipes/mock-module-exports/package.json b/recipes/mock-module-exports/package.json
index bcbccc09..0726da07 100644
--- a/recipes/mock-module-exports/package.json
+++ b/recipes/mock-module-exports/package.json
@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "test": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/",
-    "testu": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/ --filter \"option-as-variable\""
+    "testu": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/ --filter \"destru\""
   },
   "repository": {
     "type": "git",
diff --git a/recipes/mock-module-exports/src/workflow.ts b/recipes/mock-module-exports/src/workflow.ts
index 825b89c8..fa7c0cb8 100644
--- a/recipes/mock-module-exports/src/workflow.ts
+++ b/recipes/mock-module-exports/src/workflow.ts
@@ -16,7 +16,7 @@ type QueueEvent = {
 const queue: QueueEvent[] = [];
 
 type Pair = {
-	before: SgNode<JS, 'pair'>;
+	before: SgNode<JS, 'pair'> | SgNode<JS, 'spread_element'>;
 	after: string;
 };
 
@@ -32,6 +32,7 @@ type Parsers = {
 	defaultExport: (node: SgNode<JS, Kinds<JS>>) => Edit[];
 	resolveVariables: (node: SgNode<JS, Kinds<JS>>) => undefined;
 	namedExports: (optionsNode: SgNode<JS, Kinds<JS>>) => Edit[];
+	spreadElements: (node: SgNode<JS, Kinds<JS>>) => undefined;
 };
 
 const parsers: Parsers = {
@@ -46,6 +47,10 @@ const parsers: Parsers = {
 					event: 'namedExports',
 					handler: () => parsers.namedExports(optionsNode),
 				});
+				queue.unshift({
+					event: 'spreadElements',
+					handler: () => parsers.spreadElements(optionsNode),
+				});
 			case 'identifier':
 				queue.unshift({
 					event: 'resolveVariables',
@@ -136,6 +141,24 @@ const parsers: Parsers = {
 		}
 		return edits;
 	},
+	spreadElements: (node: SgNode<JS, Kinds<JS>>): undefined => {
+		const spreadElements = node.findAll<'spread_element'>({
+			rule: {
+				kind: 'spread_element',
+			},
+		});
+
+		if (spreadElements) {
+			const pairs = exportedValues.get(node.id()).named;
+
+			for (const spread of spreadElements) {
+				pairs.push({
+					before: spread,
+					after: spread.text(),
+				});
+			}
+		}
+	},
 };
 
 export default function transform(root: SgRoot<JS>): string | null {
diff --git a/recipes/mock-module-exports/tests/basic/expected.mjs b/recipes/mock-module-exports/tests/basic/expected.mjs
index 5eaa856f..4dda4559 100644
--- a/recipes/mock-module-exports/tests/basic/expected.mjs
+++ b/recipes/mock-module-exports/tests/basic/expected.mjs
@@ -4,5 +4,6 @@ mock.module('example', {
 	exports: {
 		default: 'bar',
 		foo: 'foo',
+		baz: 'baz',
 	},
 });
diff --git a/recipes/mock-module-exports/tests/basic/input.mjs b/recipes/mock-module-exports/tests/basic/input.mjs
index 74a3d627..8e6b9df8 100644
--- a/recipes/mock-module-exports/tests/basic/input.mjs
+++ b/recipes/mock-module-exports/tests/basic/input.mjs
@@ -4,5 +4,6 @@ mock.module('example', {
 	defaultExport: 'bar',
 	namedExports: {
 		foo: 'foo',
+		baz: 'baz',
 	},
 });
diff --git a/recipes/mock-module-exports/tests/destructuring-example/expected.mjs b/recipes/mock-module-exports/tests/destructuring-example/expected.mjs
new file mode 100644
index 00000000..6ada2ee8
--- /dev/null
+++ b/recipes/mock-module-exports/tests/destructuring-example/expected.mjs
@@ -0,0 +1,16 @@
+import { mock } from 'node:test';
+
+const foo = {
+	a: 'a',
+	b: 'b',
+	c: 'c'
+}
+
+const mockValues = {
+	exports: {
+		default: 'bar',
+		...foo,
+	},
+}
+
+mock.module('example', mockValues);
diff --git a/recipes/mock-module-exports/tests/destructuring-example/input.mjs b/recipes/mock-module-exports/tests/destructuring-example/input.mjs
new file mode 100644
index 00000000..63d1ccd1
--- /dev/null
+++ b/recipes/mock-module-exports/tests/destructuring-example/input.mjs
@@ -0,0 +1,16 @@
+import { mock } from 'node:test';
+
+const foo = {
+	a: 'a',
+	b: 'b',
+	c: 'c'
+}
+
+const mockValues = {
+	defaultExport: 'bar',
+	namedExports: {
+		...foo
+	},
+}
+
+mock.module('example', mockValues);
diff --git a/recipes/mock-module-exports/tests/esm-default-import/expected.mjs b/recipes/mock-module-exports/tests/esm-default-import/expected.mjs
index c46c9f9d..0fb52d3b 100644
--- a/recipes/mock-module-exports/tests/esm-default-import/expected.mjs
+++ b/recipes/mock-module-exports/tests/esm-default-import/expected.mjs
@@ -1,8 +1,11 @@
 import test from 'node:test';
 
+const bar = 'bar'
+const foo = 'foo'
+
 test.mock.module('example', {
 	exports: {
-		default: 'bar',
-		foo: 'foo',
+		default: bar,
+		foo: foo,
 	},
 });
diff --git a/recipes/mock-module-exports/tests/esm-default-import/input.mjs b/recipes/mock-module-exports/tests/esm-default-import/input.mjs
index 74149ec9..827272e2 100644
--- a/recipes/mock-module-exports/tests/esm-default-import/input.mjs
+++ b/recipes/mock-module-exports/tests/esm-default-import/input.mjs
@@ -1,8 +1,11 @@
 import test from 'node:test';
 
+const bar = 'bar'
+const foo = 'foo'
+
 test.mock.module('example', {
-	defaultExport: 'bar',
+	defaultExport: bar,
 	namedExports: {
-		foo: 'foo',
+		foo: foo,
 	},
 });

From 1c6c0eff6a5c699dcf0bc65f0701c9f5cd85d315 Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Sat, 14 Mar 2026 16:09:18 +0000
Subject: [PATCH 05/15] feat: support namedExports as a variable

---
 recipes/mock-module-exports/src/workflow.ts   | 12 ++++++---
 .../tests/basic/expected.mjs                  | 27 +++++++++++++++++++
 .../mock-module-exports/tests/basic/input.mjs | 27 +++++++++++++++++++
 3 files changed, 63 insertions(+), 3 deletions(-)

diff --git a/recipes/mock-module-exports/src/workflow.ts b/recipes/mock-module-exports/src/workflow.ts
index fa7c0cb8..5caf3234 100644
--- a/recipes/mock-module-exports/src/workflow.ts
+++ b/recipes/mock-module-exports/src/workflow.ts
@@ -107,7 +107,6 @@ const parsers: Parsers = {
 		return edits;
 	},
 	namedExports: (node: SgNode<JS, Kinds<JS>>): Edit[] => {
-		const edits: Edit[] = [];
 		const namedExport = node.find<'pair'>({
 			rule: {
 				kind: 'pair',
@@ -130,7 +129,15 @@ const parsers: Parsers = {
 
 			const pairs = exportedValues.get(node.id()).named;
 
-			for (const namedPair of namedExport.field('value').children()) {
+			const fieldValueNode = namedExport.field('value');
+
+			if (fieldValueNode.is('identifier')) {
+				pairs.push({
+					before: namedExport,
+					after: `...(${fieldValueNode.text()} || {})`,
+				});
+			}
+			for (const namedPair of fieldValueNode.children()) {
 				if (!namedPair.is('pair')) continue;
 
 				pairs.push({
@@ -139,7 +146,6 @@ const parsers: Parsers = {
 				});
 			}
 		}
-		return edits;
 	},
 	spreadElements: (node: SgNode<JS, Kinds<JS>>): undefined => {
 		const spreadElements = node.findAll<'spread_element'>({
diff --git a/recipes/mock-module-exports/tests/basic/expected.mjs b/recipes/mock-module-exports/tests/basic/expected.mjs
index 4dda4559..b734377e 100644
--- a/recipes/mock-module-exports/tests/basic/expected.mjs
+++ b/recipes/mock-module-exports/tests/basic/expected.mjs
@@ -7,3 +7,30 @@ mock.module('example', {
 		baz: 'baz',
 	},
 });
+
+const namedExports = {
+	foo: 'foo',
+	baz: 'baz',
+}
+
+mock.module('example2', {
+	exports: {
+		default: 'bar',
+		...(namedExports || {}),
+	},
+});
+
+function getDefault() {
+	return 'bar'
+}
+
+function getBar() {
+	return 'bar'
+}
+
+mock.module('example3', {
+	exports: {
+		default: getDefault(),
+		bar: getBar(),
+	},
+});
diff --git a/recipes/mock-module-exports/tests/basic/input.mjs b/recipes/mock-module-exports/tests/basic/input.mjs
index 8e6b9df8..88f17d08 100644
--- a/recipes/mock-module-exports/tests/basic/input.mjs
+++ b/recipes/mock-module-exports/tests/basic/input.mjs
@@ -7,3 +7,30 @@ mock.module('example', {
 		baz: 'baz',
 	},
 });
+
+const namedExports = {
+	foo: 'foo',
+	baz: 'baz',
+}
+
+mock.module('example2', {
+	defaultExport: 'bar',
+	namedExports: namedExports,
+});
+
+function getDefault() {
+	return 'bar'
+}
+
+function getBar() {
+	return 'bar'
+}
+
+mock.module('example3', {
+	exports: {
+		defaultExport: getDefault(),
+		namedExports: {
+			bar: getBar(),
+		}
+	},
+});

From d419a0a36fc88757c65d9225b4ee2cbe651752fa Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Sat, 14 Mar 2026 16:22:10 +0000
Subject: [PATCH 06/15] feat: empty examples

---
 recipes/mock-module-exports/src/workflow.ts   |  8 ++++++++
 .../tests/basic/expected.mjs                  | 17 +++++++++++++++++
 .../mock-module-exports/tests/basic/input.mjs | 19 +++++++++++++++++++
 3 files changed, 44 insertions(+)

diff --git a/recipes/mock-module-exports/src/workflow.ts b/recipes/mock-module-exports/src/workflow.ts
index 5caf3234..df22066c 100644
--- a/recipes/mock-module-exports/src/workflow.ts
+++ b/recipes/mock-module-exports/src/workflow.ts
@@ -155,6 +155,14 @@ const parsers: Parsers = {
 		});
 
 		if (spreadElements) {
+			if (!exportedValues.has(node.id())) {
+				exportedValues.set(node.id(), {
+					node,
+					default: undefined,
+					named: [],
+				});
+			}
+
 			const pairs = exportedValues.get(node.id()).named;
 
 			for (const spread of spreadElements) {
diff --git a/recipes/mock-module-exports/tests/basic/expected.mjs b/recipes/mock-module-exports/tests/basic/expected.mjs
index b734377e..4361f0d5 100644
--- a/recipes/mock-module-exports/tests/basic/expected.mjs
+++ b/recipes/mock-module-exports/tests/basic/expected.mjs
@@ -34,3 +34,20 @@ mock.module('example3', {
 		bar: getBar(),
 	},
 });
+
+mock.module('example-no-named', {
+	exports: {
+		default: getDefault(),
+	},
+});
+
+mock.module('example-no-fault', {
+	exports: {
+		bar: 'bar',
+	},
+});
+
+mock.module('example-empty', {
+	exports: {
+	},
+});
diff --git a/recipes/mock-module-exports/tests/basic/input.mjs b/recipes/mock-module-exports/tests/basic/input.mjs
index 88f17d08..2f4c1d5f 100644
--- a/recipes/mock-module-exports/tests/basic/input.mjs
+++ b/recipes/mock-module-exports/tests/basic/input.mjs
@@ -34,3 +34,22 @@ mock.module('example3', {
 		}
 	},
 });
+
+mock.module('example-no-named', {
+	exports: {
+		defaultExport: getDefault(),
+	},
+});
+
+mock.module('example-no-fault', {
+	exports: {
+		namedExports: {
+			bar: 'bar',
+		}
+	},
+});
+
+mock.module('example-empty', {
+	exports: {
+	},
+});

From 2ea22ebf82a8a9f00f152b2e9796ebc42452c7d3 Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Sat, 14 Mar 2026 22:35:00 +0000
Subject: [PATCH 07/15] feat: add support when a fn return values

---
 recipes/mock-module-exports/package.json      |  2 +-
 recipes/mock-module-exports/src/workflow.ts   | 45 +++++++++++++++----
 .../tests/fn-return-example/expected.mjs      | 18 ++++++++
 .../tests/fn-return-example/input.mjs         | 18 ++++++++
 4 files changed, 74 insertions(+), 9 deletions(-)
 create mode 100644 recipes/mock-module-exports/tests/fn-return-example/expected.mjs
 create mode 100644 recipes/mock-module-exports/tests/fn-return-example/input.mjs

diff --git a/recipes/mock-module-exports/package.json b/recipes/mock-module-exports/package.json
index 0726da07..fbdb0800 100644
--- a/recipes/mock-module-exports/package.json
+++ b/recipes/mock-module-exports/package.json
@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "test": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/",
-    "testu": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/ --filter \"destru\""
+    "testu": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/ --filter \"variable\""
   },
   "repository": {
     "type": "git",
diff --git a/recipes/mock-module-exports/src/workflow.ts b/recipes/mock-module-exports/src/workflow.ts
index df22066c..1887ab4c 100644
--- a/recipes/mock-module-exports/src/workflow.ts
+++ b/recipes/mock-module-exports/src/workflow.ts
@@ -10,7 +10,7 @@ import { EOL } from 'node:os';
 
 type QueueEvent = {
 	event: keyof typeof parsers;
-	handler: () => Edit[];
+	handler: () => void;
 };
 
 const queue: QueueEvent[] = [];
@@ -28,15 +28,15 @@ type ExportedValue = {
 const exportedValues: Map<number, ExportedValue> = new Map();
 
 type Parsers = {
-	parseOptions: (optionsNode: SgNode<JS, Kinds<JS>>) => undefined;
-	defaultExport: (node: SgNode<JS, Kinds<JS>>) => Edit[];
-	resolveVariables: (node: SgNode<JS, Kinds<JS>>) => undefined;
-	namedExports: (optionsNode: SgNode<JS, Kinds<JS>>) => Edit[];
-	spreadElements: (node: SgNode<JS, Kinds<JS>>) => undefined;
+	parseOptions: (optionsNode: SgNode<JS, Kinds<JS>>) => void;
+	defaultExport: (node: SgNode<JS, Kinds<JS>>) => void;
+	resolveVariables: (node: SgNode<JS, Kinds<JS>>) => void;
+	namedExports: (optionsNode: SgNode<JS, Kinds<JS>>) => void;
+	spreadElements: (node: SgNode<JS, Kinds<JS>>) => void;
 };
 
 const parsers: Parsers = {
-	parseOptions: (optionsNode: SgNode<JS, Kinds<JS>>): undefined => {
+	parseOptions: (optionsNode: SgNode<JS, Kinds<JS>>) => {
 		switch (optionsNode.kind()) {
 			case 'object':
 				queue.unshift({
@@ -51,11 +51,20 @@ const parsers: Parsers = {
 					event: 'spreadElements',
 					handler: () => parsers.spreadElements(optionsNode),
 				});
+				break;
 			case 'identifier':
 				queue.unshift({
 					event: 'resolveVariables',
 					handler: () => parsers.resolveVariables(optionsNode),
 				});
+				break;
+			case 'call_expression':
+				queue.unshift({
+					event: 'resolveVariables',
+					handler: () =>
+						parsers.resolveVariables(optionsNode.field('function')),
+				});
+				break;
 		}
 	},
 	resolveVariables: (node: SgNode<JS, Kinds<JS>>) => {
@@ -70,6 +79,26 @@ const parsers: Parsers = {
 					handler: () => parsers.parseOptions(parent.field('value')),
 				});
 				break;
+			case 'function_declaration':
+				const fnDeclaration = definition.node.parent<'variable_declarator'>();
+
+				const returns = fnDeclaration
+					.findAll<'return_statement'>({
+						rule: {
+							kind: 'return_statement',
+						},
+					})
+					.map((n) => n.child(1));
+
+				for (const ret of returns) {
+					if (!ret) continue;
+
+					queue.unshift({
+						event: 'parseOptions',
+						handler: () => parsers.parseOptions(ret),
+					});
+				}
+				break;
 			default:
 				throw new Error('unhandled scenario');
 		}
@@ -106,7 +135,7 @@ const parsers: Parsers = {
 		}
 		return edits;
 	},
-	namedExports: (node: SgNode<JS, Kinds<JS>>): Edit[] => {
+	namedExports: (node: SgNode<JS, Kinds<JS>>) => {
 		const namedExport = node.find<'pair'>({
 			rule: {
 				kind: 'pair',
diff --git a/recipes/mock-module-exports/tests/fn-return-example/expected.mjs b/recipes/mock-module-exports/tests/fn-return-example/expected.mjs
new file mode 100644
index 00000000..abf124a1
--- /dev/null
+++ b/recipes/mock-module-exports/tests/fn-return-example/expected.mjs
@@ -0,0 +1,18 @@
+import { mock } from 'node:test';
+
+const foo = {
+	a: 'a',
+	b: 'b',
+	c: 'c'
+}
+
+function mockValues() {
+	return {
+		exports: {
+			default: 'bar',
+			...foo,
+		},
+	}
+}
+
+mock.module('example', mockValues());
diff --git a/recipes/mock-module-exports/tests/fn-return-example/input.mjs b/recipes/mock-module-exports/tests/fn-return-example/input.mjs
new file mode 100644
index 00000000..0ad9e863
--- /dev/null
+++ b/recipes/mock-module-exports/tests/fn-return-example/input.mjs
@@ -0,0 +1,18 @@
+import { mock } from 'node:test';
+
+const foo = {
+	a: 'a',
+	b: 'b',
+	c: 'c'
+}
+
+function mockValues() {
+	return {
+		defaultExport: 'bar',
+		namedExports: {
+			...foo,
+		},
+	}
+}
+
+mock.module('example', mockValues());

From 4298c5a8a74a948855cbaf8bacf87edde50e5387 Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Sat, 14 Mar 2026 22:46:26 +0000
Subject: [PATCH 08/15] docs

---
 recipes/mock-module-exports/README.md     | 17 ++++++++++++++++-
 recipes/mock-module-exports/codemod.yaml  |  2 +-
 recipes/mock-module-exports/package.json  |  5 ++---
 recipes/mock-module-exports/workflow.yaml |  2 +-
 4 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/recipes/mock-module-exports/README.md b/recipes/mock-module-exports/README.md
index 69208808..633e9e5f 100644
--- a/recipes/mock-module-exports/README.md
+++ b/recipes/mock-module-exports/README.md
@@ -1,4 +1,19 @@
 # Mock Module Exports
 
-This codemod helps migrate code that uses mock.module.
+This migration trasforming use of deprecated `options.defaultExport` and `options.namedExports` on
+`node:test.mock`
 
+## Example
+
+```diff
+mock.module('…', {
+-   defaultExport: …,
+-   namedExports: {
+-   	foo: …
+-   },
++   exports: {
++   	default: …,
++   	foo: …,
++   },
+});
+```
diff --git a/recipes/mock-module-exports/codemod.yaml b/recipes/mock-module-exports/codemod.yaml
index e062f733..5643f3b6 100644
--- a/recipes/mock-module-exports/codemod.yaml
+++ b/recipes/mock-module-exports/codemod.yaml
@@ -1,7 +1,7 @@
 schema_version: "1.0"
 name: "@nodejs/mock-module-exports"
 version: 1.0.0
-description: ""
+description: "Handle mock.module exports deprecation"
 author: Bruno Rodrigues
 license: MIT
 workflow: workflow.yaml
diff --git a/recipes/mock-module-exports/package.json b/recipes/mock-module-exports/package.json
index fbdb0800..9c2424dd 100644
--- a/recipes/mock-module-exports/package.json
+++ b/recipes/mock-module-exports/package.json
@@ -1,11 +1,10 @@
 {
   "name": "@nodejs/mock-module-exports",
-  "version": "1.0.1",
-  "description": "",
+  "version": "1.0.0",
+  "description": "Handle mock.module exports deprecation",
   "type": "module",
   "scripts": {
     "test": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/",
-    "testu": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/ --filter \"variable\""
   },
   "repository": {
     "type": "git",
diff --git a/recipes/mock-module-exports/workflow.yaml b/recipes/mock-module-exports/workflow.yaml
index 61c35e95..80809110 100644
--- a/recipes/mock-module-exports/workflow.yaml
+++ b/recipes/mock-module-exports/workflow.yaml
@@ -7,7 +7,7 @@ nodes:
     runtime:
       type: direct
     steps:
-      - name: ""
+      - name: Handle mock.module exports deprecation
         js-ast-grep:
           js_file: src/workflow.ts
           base_path: .

From 5b15a7909f5f350d59683d04353f236541edcc9d Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Sat, 14 Mar 2026 22:47:48 +0000
Subject: [PATCH 09/15] docs

---
 recipes/mock-module-exports/package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/recipes/mock-module-exports/package.json b/recipes/mock-module-exports/package.json
index 9c2424dd..a75a220b 100644
--- a/recipes/mock-module-exports/package.json
+++ b/recipes/mock-module-exports/package.json
@@ -4,7 +4,7 @@
   "description": "Handle mock.module exports deprecation",
   "type": "module",
   "scripts": {
-    "test": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/",
+    "test": "npx codemod jssg test -l typescript ./src/workflow.ts ./tests/"
   },
   "repository": {
     "type": "git",

From 462774723d37cc34e5176597155191f71bfea22b Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Sat, 14 Mar 2026 22:50:35 +0000
Subject: [PATCH 10/15] npm install

---
 package-lock.json | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/package-lock.json b/package-lock.json
index bce2a02a..b9372ec4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1527,6 +1527,10 @@
       "resolved": "recipes/import-assertions-to-attributes",
       "link": true
     },
+    "node_modules/@nodejs/mock-module-exports": {
+      "resolved": "recipes/mock-module-exports",
+      "link": true
+    },
     "node_modules/@nodejs/node-url-to-whatwg-url": {
       "resolved": "recipes/node-url-to-whatwg-url",
       "link": true
@@ -4438,6 +4442,17 @@
         "@codemod.com/jssg-types": "^1.5.0"
       }
     },
+    "recipes/mock-module-exports": {
+      "name": "@nodejs/mock-module-exports",
+      "version": "1.0.0",
+      "license": "MIT",
+      "dependencies": {
+        "@nodejs/codemod-utils": "0.0.0"
+      },
+      "devDependencies": {
+        "@codemod.com/jssg-types": "^1.3.1"
+      }
+    },
     "recipes/node-url-to-whatwg-url": {
       "name": "@nodejs/node-url-to-whatwg-url",
       "version": "1.0.1",

From 21f69b28f32890e21b71f7c91c749d0d872caac0 Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Sat, 14 Mar 2026 22:52:29 +0000
Subject: [PATCH 11/15] lint

---
 recipes/mock-module-exports/src/workflow.ts | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/recipes/mock-module-exports/src/workflow.ts b/recipes/mock-module-exports/src/workflow.ts
index 1887ab4c..cfdef0ae 100644
--- a/recipes/mock-module-exports/src/workflow.ts
+++ b/recipes/mock-module-exports/src/workflow.ts
@@ -72,14 +72,15 @@ const parsers: Parsers = {
 		if (!definition) return;
 
 		switch (definition.node.parent().kind()) {
-			case 'variable_declarator':
+			case 'variable_declarator': {
 				const parent = definition.node.parent<'variable_declarator'>();
 				queue.unshift({
 					event: 'parseOptions',
 					handler: () => parsers.parseOptions(parent.field('value')),
 				});
 				break;
-			case 'function_declaration':
+			}
+			case 'function_declaration': {
 				const fnDeclaration = definition.node.parent<'variable_declarator'>();
 
 				const returns = fnDeclaration
@@ -99,6 +100,7 @@ const parsers: Parsers = {
 					});
 				}
 				break;
+			}
 			default:
 				throw new Error('unhandled scenario');
 		}
@@ -274,7 +276,7 @@ export default function transform(root: SgRoot<JS>): string | null {
 		edits.push(change.node.replace(newValue));
 	}
 
-	let sourceCode = rootNode.commitEdits(edits);
+	const sourceCode = rootNode.commitEdits(edits);
 
 	return sourceCode;
 }

From 2267171224d91b3f0e242d530dbd783d126ce890 Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Sun, 15 Mar 2026 21:33:54 +0000
Subject: [PATCH 12/15] Group unshift on queue, and make ifs more readable

Co-authored-by: Jacob Smith <3012099+JakobJingleheimer@users.noreply.github.com>
---
 recipes/mock-module-exports/src/workflow.ts | 63 ++++++++++-----------
 1 file changed, 29 insertions(+), 34 deletions(-)

diff --git a/recipes/mock-module-exports/src/workflow.ts b/recipes/mock-module-exports/src/workflow.ts
index cfdef0ae..bb49a610 100644
--- a/recipes/mock-module-exports/src/workflow.ts
+++ b/recipes/mock-module-exports/src/workflow.ts
@@ -27,30 +27,24 @@ type ExportedValue = {
 };
 const exportedValues: Map<number, ExportedValue> = new Map();
 
-type Parsers = {
-	parseOptions: (optionsNode: SgNode<JS, Kinds<JS>>) => void;
-	defaultExport: (node: SgNode<JS, Kinds<JS>>) => void;
-	resolveVariables: (node: SgNode<JS, Kinds<JS>>) => void;
-	namedExports: (optionsNode: SgNode<JS, Kinds<JS>>) => void;
-	spreadElements: (node: SgNode<JS, Kinds<JS>>) => void;
-};
-
-const parsers: Parsers = {
+const parsers = {
 	parseOptions: (optionsNode: SgNode<JS, Kinds<JS>>) => {
 		switch (optionsNode.kind()) {
 			case 'object':
-				queue.unshift({
-					event: 'defaultExport',
-					handler: () => parsers.defaultExport(optionsNode),
-				});
-				queue.unshift({
-					event: 'namedExports',
-					handler: () => parsers.namedExports(optionsNode),
-				});
-				queue.unshift({
-					event: 'spreadElements',
-					handler: () => parsers.spreadElements(optionsNode),
-				});
+				queue.unshift(
+					{
+						event: 'defaultExport',
+						handler: () => parsers.defaultExport(optionsNode),
+					},
+					{
+						event: 'namedExports',
+						handler: () => parsers.namedExports(optionsNode),
+					},
+					{
+						event: 'spreadElements',
+						handler: () => parsers.spreadElements(optionsNode),
+					},
+				);
 				break;
 			case 'identifier':
 				queue.unshift({
@@ -92,13 +86,14 @@ const parsers: Parsers = {
 					.map((n) => n.child(1));
 
 				for (const ret of returns) {
-					if (!ret) continue;
-
-					queue.unshift({
-						event: 'parseOptions',
-						handler: () => parsers.parseOptions(ret),
-					});
+					if (ret) {
+						queue.unshift({
+							event: 'parseOptions',
+							handler: () => parsers.parseOptions(ret),
+						});
+					}
 				}
+
 				break;
 			}
 			default:
@@ -169,12 +164,12 @@ const parsers: Parsers = {
 				});
 			}
 			for (const namedPair of fieldValueNode.children()) {
-				if (!namedPair.is('pair')) continue;
-
-				pairs.push({
-					before: namedPair,
-					after: namedPair.text(),
-				});
+				if (namedPair.is('pair')) {
+					pairs.push({
+						before: namedPair,
+						after: namedPair.text(),
+					});
+				}
 			}
 		}
 	},
@@ -204,7 +199,7 @@ const parsers: Parsers = {
 			}
 		}
 	},
-};
+} as const satisfies Record<string, (node: SgNode<JS, Kinds<JS>>) => void>;
 
 export default function transform(root: SgRoot<JS>): string | null {
 	const rootNode = root.root();

From 4d1baab0080660681c4643fbd00cc7d6a0af8120 Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Mon, 16 Mar 2026 10:01:21 +0000
Subject: [PATCH 13/15] Skip processing when needed and fix typos in
 package.json

Co-authored-by: Augustin Mauroy <97875033+AugustinMauroy@users.noreply.github.com>
---
 recipes/mock-module-exports/package.json    | 4 ++--
 recipes/mock-module-exports/src/workflow.ts | 6 ++++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/recipes/mock-module-exports/package.json b/recipes/mock-module-exports/package.json
index a75a220b..8f0055e0 100644
--- a/recipes/mock-module-exports/package.json
+++ b/recipes/mock-module-exports/package.json
@@ -9,7 +9,7 @@
   "repository": {
     "type": "git",
     "url": "git+https://github.com/nodejs/userland-migrations.git",
-    "directory": "recipes/util-is",
+    "directory": "recipes/mock-module-exports",
     "bugs": "https://github.com/nodejs/userland-migrations/issues"
   },
   "author": "Bruno Rodrigues",
@@ -19,6 +19,6 @@
     "@codemod.com/jssg-types": "^1.3.1"
   },
   "dependencies": {
-    "@nodejs/codemod-utils": "0.0.0"
+    "@nodejs/codemod-utils": "*"
   }
 }
diff --git a/recipes/mock-module-exports/src/workflow.ts b/recipes/mock-module-exports/src/workflow.ts
index bb49a610..2a7b7c7f 100644
--- a/recipes/mock-module-exports/src/workflow.ts
+++ b/recipes/mock-module-exports/src/workflow.ts
@@ -208,6 +208,8 @@ export default function transform(root: SgRoot<JS>): string | null {
 	const deps = getModuleDependencies(root, 'test');
 	let moduleFnCalls: SgNode<JS, 'call_expression'>[] = [];
 
+	if (!deps.length) return null;
+
 	for (const dep of deps) {
 		const moduleFn = resolveBindingPath(dep, '$.mock.module');
 
@@ -271,7 +273,7 @@ export default function transform(root: SgRoot<JS>): string | null {
 		edits.push(change.node.replace(newValue));
 	}
 
-	const sourceCode = rootNode.commitEdits(edits);
+	if (!edits.length) return null;
 
-	return sourceCode;
+	return rootNode.commitEdits(edits);
 }

From efc756a08cfcf01a30a49e0d844b647a43d975c9 Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Wed, 18 Mar 2026 13:27:55 +0000
Subject: [PATCH 14/15] replace unshift with push

---
 recipes/mock-module-exports/src/workflow.ts | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/recipes/mock-module-exports/src/workflow.ts b/recipes/mock-module-exports/src/workflow.ts
index 2a7b7c7f..ab41be46 100644
--- a/recipes/mock-module-exports/src/workflow.ts
+++ b/recipes/mock-module-exports/src/workflow.ts
@@ -31,7 +31,7 @@ const parsers = {
 	parseOptions: (optionsNode: SgNode<JS, Kinds<JS>>) => {
 		switch (optionsNode.kind()) {
 			case 'object':
-				queue.unshift(
+				queue.push(
 					{
 						event: 'defaultExport',
 						handler: () => parsers.defaultExport(optionsNode),
@@ -47,13 +47,13 @@ const parsers = {
 				);
 				break;
 			case 'identifier':
-				queue.unshift({
+				queue.push({
 					event: 'resolveVariables',
 					handler: () => parsers.resolveVariables(optionsNode),
 				});
 				break;
 			case 'call_expression':
-				queue.unshift({
+				queue.push({
 					event: 'resolveVariables',
 					handler: () =>
 						parsers.resolveVariables(optionsNode.field('function')),
@@ -68,7 +68,7 @@ const parsers = {
 		switch (definition.node.parent().kind()) {
 			case 'variable_declarator': {
 				const parent = definition.node.parent<'variable_declarator'>();
-				queue.unshift({
+				queue.push({
 					event: 'parseOptions',
 					handler: () => parsers.parseOptions(parent.field('value')),
 				});
@@ -87,7 +87,7 @@ const parsers = {
 
 				for (const ret of returns) {
 					if (ret) {
-						queue.unshift({
+						queue.push({
 							event: 'parseOptions',
 							handler: () => parsers.parseOptions(ret),
 						});
@@ -236,17 +236,19 @@ export default function transform(root: SgRoot<JS>): string | null {
 
 		if (args.length < 2) continue;
 		const optionsArg = args[1];
-		queue.unshift({
+		queue.push({
 			event: 'parseOptions',
 			handler: () => parsers.parseOptions(optionsArg),
 		});
 	}
 
 	const indentUnit = detectIndentUnit(rootNode.text());
-	while (queue.length) {
-		const event = queue.at(-1);
+
+	let i = 0;
+	while (queue.length > i) {
+		const event = queue.at(i);
 		event.handler();
-		queue.pop();
+		i += 1;
 	}
 
 	for (const [_nodeId, change] of Array.from(exportedValues)) {

From 1631f969ca9dd1379949dd91dba249dc86b2e93a Mon Sep 17 00:00:00 2001
From: Bruno Rodrigues <swe@brunocroh.com>
Date: Thu, 19 Mar 2026 22:21:16 +0000
Subject: [PATCH 15/15] chore: use increment operator

Co-authored-by: Jacob Smith <3012099+JakobJingleheimer@users.noreply.github.com>
---
 recipes/mock-module-exports/src/workflow.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/recipes/mock-module-exports/src/workflow.ts b/recipes/mock-module-exports/src/workflow.ts
index ab41be46..76105183 100644
--- a/recipes/mock-module-exports/src/workflow.ts
+++ b/recipes/mock-module-exports/src/workflow.ts
@@ -248,7 +248,7 @@ export default function transform(root: SgRoot<JS>): string | null {
 	while (queue.length > i) {
 		const event = queue.at(i);
 		event.handler();
-		i += 1;
+		i++;
 	}
 
 	for (const [_nodeId, change] of Array.from(exportedValues)) {