Add a test with ReadableStream

Author: octet-stream

lib/Encoder.test.ts

@@ -3,6 +3,7 @@ import {Readable} from "stream"
 
 import test from "ava"
 
+import {ReadableStream} from "web-streams-polyfill/ponyfill/es2018"
 import {FormData, File, fileFromPath} from "formdata-node"
 
 import readStream from "./__helper__/readStream"
@@ -173,6 +174,32 @@ test("Yields File's content", async t => {
   t.is<string>(chunks.join("\n"), expected)
 })
 
+test("Can be used with ReadableStream", async t => {
+  const fd = new FormData()
+
+  fd.set("field", "Some field value")
+
+  const encoder = new Encoder(fd)
+  const iterable = encoder.encode()
+
+  const readable = new ReadableStream<Uint8Array>({
+    async pull(controller) {
+      const {value, done} = await iterable.next()
+
+      if (done) {
+        return controller.close()
+      }
+
+      controller.enqueue(value as Uint8Array)
+    }
+  })
+
+  const expected = await readStream(encoder)
+  const actual = await readStream(readable)
+
+  t.true(actual.equals(expected))
+})
+
 test(
   "Throws TypeError when the first argument is not a FormData instance",
   t => {

lib/__helper__/readStream.ts

@@ -1,6 +1,8 @@
 import {Readable} from "stream"
 
-type Input = Readable | {
+import {ReadableStream} from "web-streams-polyfill/ponyfill/es2018"
+
+type Input = Readable | ReadableStream | {
   [Symbol.asyncIterator](): AsyncIterableIterator<any>
 }
 

package.json

@@ -56,7 +56,8 @@
     "pinst": "2.1.6",
     "ts-node": "9.1.1",
     "ttypescript": "1.5.12",
-    "typescript": "4.2.4"
+    "typescript": "4.2.4",
+    "web-streams-polyfill": "^3.0.3"
   },
   "dependencies": {
     "mime-types": "2.1.30"