Import //fetch from Web Platform Tests.

third_party/WebKit/LayoutTests/external/wpt/fetch/api/basic/request-upload.js

+if (this.document === undefined) {
+  importScripts("/resources/testharness.js");
+  importScripts("../resources/utils.js");
+}
+
+function testUpload(desc, url, method, createBody, expectedBody) {
+  var requestInit = {"method": method}
+  promise_test(function(test){
+    let body = createBody();
+    if (body)
+      requestInit["body"] = body;
+    return fetch(url, requestInit).then(function(resp) {
+      return resp.text().then((text)=> {
+        assert_equals(text, expectedBody);
+      });
+    });
+  }, desc);
+}
+
+function testUploadFailure(desc, url, method, createBody) {
+  const requestInit = {"method": method};
+  promise_test(test => {
+    let body = createBody();
+    if (body)
+      requestInit["body"] = body;
+    return promise_rejects(new TypeError(), fetch(url, requestInit));
+  }, desc);
+}
+
+var url = RESOURCES_DIR + "echo-content.py"
+
+testUpload("Fetch with PUT with body", url,
+  "PUT",
+  () => "Request's body",
+  "Request's body");
+testUpload("Fetch with POST with text body", url,
+  "POST",
+  () => "Request's body",
+  "Request's body");
+testUpload("Fetch with POST with URLSearchParams body", url,
+  "POST",
+  () => new URLSearchParams("name=value"),
+  "name=value");
+testUpload("Fetch with POST with Blob body", url,
+  "POST",
+  () => new Blob(["Test"]),
+  "Test");
+testUpload("Fetch with POST with ArrayBuffer body", url,
+  "POST",
+  () => new ArrayBuffer(4),
+  "\0\0\0\0");
+testUpload("Fetch with POST with Uint8Array body", url,
+  "POST",
+  () => new Uint8Array(4),
+  "\0\0\0\0");
+testUpload("Fetch with POST with Int8Array body", url,
+  "POST",
+  () => new Int8Array(4),
+  "\0\0\0\0");
+testUpload("Fetch with POST with Float32Array body", url,
+  "POST",
+  () => new Float32Array(1),
+  "\0\0\0\0");
+testUpload("Fetch with POST with Float64Array body", url,
+  "POST",
+  () => new Float64Array(1),
+  "\0\0\0\0\0\0\0\0");
+testUpload("Fetch with POST with DataView body", url,
+  "POST",
+  () => new DataView(new ArrayBuffer(8), 0, 4),
+  "\0\0\0\0");
+testUpload("Fetch with POST with Blob body with mime type", url,
+  "POST",
+  () => new Blob(["Test"], { type: "text/maybe" }),
+  "Test");
+testUpload("Fetch with POST with ReadableStream", url,
+  "POST",
+  () => {
+    new ReadableStream({start: controller => {
+      const encoder = new TextEncoder();
+      controller.enqueue(encoder.encode("Test"));
+      controller.close();
+    }})
+  },
+  "Test");
+testUploadFailure("Fetch with POST with ReadableStream containing String", url,
+  "POST",
+  () => {
+    new ReadableStream({start: controller => {
+      controller.enqueue("Test");
+      controller.close();
+    }})
+  });
+testUploadFailure("Fetch with POST with ReadableStream containing null", url,
+  "POST",
+  () => {
+    new ReadableStream({start: controller => {
+      controller.enqueue(null);
+      controller.close();
+    }})
+  });
+testUploadFailure("Fetch with POST with ReadableStream containing number", url,
+  "POST",
+  () => {
+    new ReadableStream({start: controller => {
+      controller.enqueue(99);
+      controller.close();
+    }})
+  });
+testUploadFailure("Fetch with POST with ReadableStream containing ArrayBuffer", url,
+  "POST",
+  () => {
+    new ReadableStream({start: controller => {
+      controller.enqueue(new ArrayBuffer());
+      controller.close();
+    }})
+  });
+testUploadFailure("Fetch with POST with ReadableStream containing Blob", url,
+  "POST",
+  () => {
+    new ReadableStream({start: controller => {
+      controller.enqueue(new Blob());
+      controller.close();
+    }})
+  });
+
+done();