refactor: use only low-level APIs in dag.get test

Implements the same change as #2987 but using the unixfs-importer
because go-ipfs does not support specifying CID versions to /block/put
so the client has to create the CID and supply it.

Author: achingbrain

packages/interface-ipfs-core/src/dag/get.js

@@ -4,6 +4,7 @@
 const dagPB = require('ipld-dag-pb')
 const DAGNode = dagPB.DAGNode
 const dagCBOR = require('ipld-dag-cbor')
+const importer = require('ipfs-unixfs-importer')
 const Unixfs = require('ipfs-unixfs')
 const all = require('it-all')
 const { getDescribe, getIt, expect } = require('../utils/mocha')
@@ -154,7 +155,10 @@ module.exports = (common, options) => {
     it('should get a node added as CIDv1 with a CIDv0', async () => {
       const input = Buffer.from(`TEST${Math.random()}`)
 
-      const res = await all(ipfs.add(input, { cidVersion: 1, rawLeaves: false }))
+      const res = await all(importer([{ content: input }], ipfs.block, {
+        cidVersion: 1,
+        rawLeaves: false
+      }))
 
       const cidv1 = res[0].cid
       expect(cidv1.version).to.equal(1)