fix: still load dag-pb, dag-cbor and raw when specifying custom formats (#3132)

If we specify a `formats` array as part of the ipld options in in-proc
nodes, it replaces the default list of dag-pb, dag-cbor and raw.

This change allows the `loadFormat` function to still resolve those
formats even if the user has passed a `format` array that does not
contain them.

Fixes #3129

Author: achingbrain

test/dag.spec.js

@@ -5,7 +5,8 @@
 
 const { Buffer } = require('buffer')
 const { expect } = require('interface-ipfs-core/src/utils/mocha')
-const { DAGNode } = require('ipld-dag-pb')
+const ipldDagPb = require('ipld-dag-pb')
+const { DAGNode } = ipldDagPb
 const CID = require('cids')
 const f = require('./utils/factory')()
 const ipfsHttpClient = require('../src')
@@ -98,4 +99,32 @@ describe('.dag', function () {
 
     expect(askedToLoadFormat).to.be.true()
   })
+
+  it('should allow formats to be specified without overwriting others', async () => {
+    const ipfs2 = ipfsHttpClient({
+      url: `http://${ipfs.apiHost}:${ipfs.apiPort}`,
+      ipld: {
+        formats: [
+          ipldDagPb
+        ]
+      }
+    })
+
+    const dagCborNode = {
+      hello: 'world'
+    }
+    const cid1 = await ipfs2.dag.put(dagCborNode, {
+      format: 'dag-cbor',
+      hashAlg: 'sha2-256'
+    })
+
+    const dagPbNode = new DAGNode(Buffer.alloc(0), [], 0)
+    const cid2 = await ipfs2.dag.put(dagPbNode, {
+      format: 'dag-pb',
+      hashAlg: 'sha2-256'
+    })
+
+    await expect(ipfs2.dag.get(cid1)).to.eventually.have.property('value').that.deep.equals(dagCborNode)
+    await expect(ipfs2.dag.get(cid2)).to.eventually.have.property('value').that.deep.equals(dagPbNode)
+  })
 })