Added Unit Tests for Output Util Function

Author: KHardik1698

package.json

@@ -58,7 +58,7 @@
     "postpack": "rm -f oclif.manifest.json",
     "posttest": "eslint . --ext .ts --config .eslintrc",
     "prepack": "rm -rf lib && tsc -b && oclif-dev manifest && oclif-dev readme",
-    "test": "jest --detectOpenHandles",
+    "test": "jest --detectOpenHandles --silent",
     "version": "oclif-dev readme && git add README.md"
   },
   "dependencies": {

test/utils/output.test.ts

@@ -0,0 +1,45 @@
+import * as path from 'path'
+import generateOutput from '../../src/utils/output'
+const invalidJsonOutput = require('../data/invalidRegex.json')
+const invalidTableOutput = require('../data/tableData.json')
+const regexMessages = require('../../messages/index.json').validateRegex
+
+jest.mock('fs')
+
+describe('Generate Output after Stack is Processed', () => {
+  beforeEach(() => {
+    jest.restoreAllMocks()
+  })
+
+  test('Filepath Flag is not set & Invalid Regex is found', async () => {
+    const resultFile = 'results.csv'
+    const storagePath = path.resolve(__dirname, '../../', resultFile)
+    const consoleSpy = jest.spyOn(console, 'log')
+    await generateOutput({}, invalidJsonOutput, invalidTableOutput)
+    expect(consoleSpy).toHaveBeenCalledTimes(4)
+    expect(consoleSpy).toHaveBeenCalledWith(regexMessages.tableOutput)
+    expect(consoleSpy).toHaveBeenCalledWith(regexMessages.csvOutput, storagePath)
+    expect(consoleSpy).toHaveBeenCalledWith(regexMessages.docsLink)
+  })
+
+  test('Filepath Flag is set & Invalid Regex is found', async () => {
+    const flags = {
+      filePath: '/path/to/output/directory/',
+    }
+    const resultFile = 'results.csv'
+    const storagePath = flags.filePath + resultFile
+    const consoleSpy = jest.spyOn(console, 'log')
+    await generateOutput(flags, invalidJsonOutput, invalidTableOutput)
+    expect(consoleSpy).toHaveBeenCalledTimes(4)
+    expect(consoleSpy).toHaveBeenCalledWith(regexMessages.tableOutput)
+    expect(consoleSpy).toHaveBeenCalledWith(regexMessages.csvOutput, storagePath)
+    expect(consoleSpy).toHaveBeenCalledWith(regexMessages.docsLink)
+  })
+
+  test('Invalid Regex is not found', async () => {
+    const consoleSpy = jest.spyOn(console, 'log')
+    await generateOutput({}, [], [])
+    expect(consoleSpy).toHaveBeenCalledTimes(1)
+    expect(consoleSpy).toHaveBeenCalledWith(regexMessages.noInvalidRegex)
+  })
+})