Async Clipboard: Update tests to use async/await syntax

Bug: 896479
Change-Id: I95b4c57b2643883f2ea7f0ebbea4f50d7bc7111a
Reviewed-on: https://chromium-review.googlesource.com/c/1371016Reviewed-by: Gary Kacmarcik <garykac@chromium.org>
Commit-Queue: Darwin Huang <huangdarwin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#615686}

third_party/blink/web_tests/external/wpt/clipboard-apis/async-write-dttext-read-dttext-manual.https.html

@@ -4,25 +4,20 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script>
-async_test(function(t) {
-  var test_data = "Clipboard write (dt/text) -> read (dt/text) test data";
-  var cb = navigator.clipboard;
-  var dt = new DataTransfer();
-  dt.items.add(test_data, "text/plain");
+promise_test(async (t) => {
+  const input = "Clipboard write (dt/text) -> read (dt/text) test data";
+  const dt = new DataTransfer();
+  dt.items.add(input, "text/plain");
 
-  cb.write(dt).then(t.step_func(() => {
-    cb.read().then(t.step_func((data) => {
-      assert_equals(data.items.length, 1);
-      data.items[0].getAsString(t.step_func((s) => {
-        assert_equals(s, test_data);
-        t.done();
-      }));
-    }), function() {
-      t.unreached_func("clipboard.read() fail");
-    });
-  }), function() {
-    t.unreached_func("clipboard.write() fail");
+  await navigator.clipboard.write(dt);
+  const output = await navigator.clipboard.read();
+
+  assert_equals(output.items.length, 1);
+  const result_promise = new Promise(resolve => {
+    output.items[0].getAsString(resolve);
   });
+  const string_output = await result_promise;
+  assert_equals(string_output, input);
 }, "Verify write and read clipboard (DataTransfer/text)");
 </script>
 Note: This is a manual test because it writes/reads to the shared system

third_party/blink/web_tests/external/wpt/clipboard-apis/async-write-dttext-read-text-manual.https.html

@@ -4,22 +4,15 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script>
-async_test(function(t) {
-  var test_data = "Clipboard write (dt/text) -> readText test data";
-  var cb = navigator.clipboard;
-  var dt = new DataTransfer();
-  dt.items.add(test_data, "text/plain");
+promise_test(async (t) => {
+  const input = "Clipboard write (dt/text) -> readText test data";
+  const dt = new DataTransfer();
+  dt.items.add(input, "text/plain");
 
-  cb.write(dt).then(t.step_func(() => {
-    cb.readText().then(t.step_func((data) => {
-      assert_equals(data, test_data);
-      t.done();
-    }), function() {
-      t.unreached_func("clipboard.read() fail");
-    });
-  }), function() {
-    t.unreached_func("clipboard.write() fail");
-  });
+  await navigator.clipboard.write(dt);
+  const output = await navigator.clipboard.readText();
+
+  assert_equals(output, input);
 }, "Verify write and read clipboard (DataTransfer/text)");
 </script>
 Note: This is a manual test because it writes/reads to the shared system

third_party/blink/web_tests/external/wpt/clipboard-apis/async-write-text-read-dttext-manual.https.html

@@ -4,22 +4,18 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script>
-async_test(function(t) {
-  var test_data = "Clipboard writeText -> read(dt/text) test data";
-  var cb = navigator.clipboard;
-  cb.writeText(test_data).then(t.step_func(() => {
-    cb.read().then(t.step_func((data) => {
-      assert_equals(data.items.length, 1);
-      data.items[0].getAsString(t.step_func((s) => {
-        assert_equals(s, test_data);
-        t.done();
-      }));
-    }), function() {
-      t.unreached_func("clipboard.read() fail");
-    });
-  }), function() {
-    t.unreached_func("clipboard.writeText() fail");
+promise_test(async (t) => {
+  const input = "Clipboard writeText -> read (dt/text) test data";
+
+  await navigator.clipboard.writeText(input);
+  const output = await navigator.clipboard.read();
+
+  assert_equals(output.items.length, 1);
+  const result_promise = new Promise(resolve => {
+    output.items[0].getAsString(resolve);
   });
+  const string_output = await result_promise;
+  assert_equals(string_output, input);
 }, "Verify write and read clipboard (DOMString)");
 </script>
 Note: This is a manual test because it writes/reads to the shared system

third_party/blink/web_tests/external/wpt/clipboard-apis/async-write-text-read-text-manual.https.html

@@ -4,19 +4,13 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script>
-async_test(function(t) {
-  var test_data = "Clipboard writeText -> readText test data";
-  var cb = navigator.clipboard;
-  cb.writeText(test_data).then(t.step_func(() => {
-    cb.readText().then(t.step_func((data) => {
-      assert_equals(data, test_data);
-      t.done();
-    }), function() {
-      t.unreached_func("clipboard.readText() fail");
-    });
-  }), function() {
-    t.unreached_func("clipboard.writeText() fail");
-  });
+promise_test(async (t) => {
+  const input = "Clipboard writeText -> readText test data";
+
+  await navigator.clipboard.writeText(input);
+  const output = await navigator.clipboard.readText();
+
+  assert_equals(output, input);
 }, "Verify write and read clipboard (DOMString)");
 </script>
 Note: This is a manual test because it writes/reads to the shared system