feat(test): dag builder custom params

packages/ipfs-unixfs-importer/test/custom-dag-builder-params.spec.ts

@@ -0,0 +1,48 @@
+import { chai } from 'aegir/chai'
+import { MemoryBlockstore } from 'blockstore-core'
+import { defaultDirBuilder, type DirBuilder } from '../src/dag-builder/dir.js'
+import {
+  defaultFileBuilder,
+  type FileBuilder
+} from '../src/dag-builder/file.js'
+import { importer } from '../src/index.js'
+
+describe('CustomParamsDagBuilder', () => {
+  it('should build a dag with custom dir builder', async () => {
+    const counter = { dirCounter: 0, fileCounter: 0 }
+    const customDirBuilder: DirBuilder = async (...args) => {
+      counter.dirCounter++
+      return defaultDirBuilder(...args)
+    }
+
+    const customFileBuilder: FileBuilder = async (...args) => {
+      counter.fileCounter++
+      return defaultFileBuilder(...args)
+    }
+
+    const blockstore = new MemoryBlockstore()
+    const files = []
+    for await (const file of importer(
+      [
+        {
+          path: './src/file.txt',
+          content: new Uint8Array(
+            'hello world'.split('').map((char) => char.charCodeAt(0))
+          )
+        },
+        {
+          path: './src'
+        }
+      ],
+      blockstore,
+      {
+        dirBuilder: customDirBuilder,
+        fileBuilder: customFileBuilder
+      }
+    )) {
+      files.push(file)
+    }
+
+    chai.expect(counter.dirCounter).to.equal(1)
+  })
+})