1 files changed, 70 insertions, 0 deletions
diff --git a/testing/web-platform/tests/FileAPI/support/Blob.js b/testing/web-platform/tests/FileAPI/support/Blob.js
new file mode 100644
index 0000000000..2c24974685
--- /dev/null
+++ b/testing/web-platform/tests/FileAPI/support/Blob.js
@@ -0,0 +1,70 @@
+'use strict'
+
+self.test_blob = (fn, expectations) => {
+  var expected = expectations.expected,
+      type = expectations.type,
+      desc = expectations.desc;
+
+  var t = async_test(desc);
+  t.step(function() {
+    var blob = fn();
+    assert_true(blob instanceof Blob);
+    assert_false(blob instanceof File);
+    assert_equals(blob.type, type);
+    assert_equals(blob.size, expected.length);
+
+    var fr = new FileReader();
+    fr.onload = t.step_func_done(function(event) {
+      assert_equals(this.result, expected);
+    }, fr);
+    fr.onerror = t.step_func(function(e) {
+      assert_unreached("got error event on FileReader");
+    });
+    fr.readAsText(blob, "UTF-8");
+  });
+}
+
+self.test_blob_binary = (fn, expectations) => {
+  var expected = expectations.expected,
+      type = expectations.type,
+      desc = expectations.desc;
+
+  var t = async_test(desc);
+  t.step(function() {
+    var blob = fn();
+    assert_true(blob instanceof Blob);
+    assert_false(blob instanceof File);
+    assert_equals(blob.type, type);
+    assert_equals(blob.size, expected.length);
+
+    var fr = new FileReader();
+    fr.onload = t.step_func_done(function(event) {
+      assert_true(this.result instanceof ArrayBuffer,
+                  "Result should be an ArrayBuffer");
+      assert_array_equals(new Uint8Array(this.result), expected);
+    }, fr);
+    fr.onerror = t.step_func(function(e) {
+      assert_unreached("got error event on FileReader");
+    });
+    fr.readAsArrayBuffer(blob);
+  });
+}
+
+// Assert that two TypedArray objects have the same byte values
+self.assert_equals_typed_array = (array1, array2) => {
+  const [view1, view2] = [array1, array2].map((array) => {
+    assert_true(array.buffer instanceof ArrayBuffer,
+      'Expect input ArrayBuffers to contain field `buffer`');
+    return new DataView(array.buffer, array.byteOffset, array.byteLength);
+  });
+
+  assert_equals(view1.byteLength, view2.byteLength,
+    'Expect both arrays to be of the same byte length');
+
+  const byteLength = view1.byteLength;
+
+  for (let i = 0; i < byteLength; ++i) {
+    assert_equals(view1.getUint8(i), view2.getUint8(i),
+      `Expect byte at buffer position ${i} to be equal`);
+  }
+}