Ensure manifest exists in Port._wpt_manifest.

third_party/WebKit/Tools/Scripts/webkitpy/w3c/wpt_manifest_unittest.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/w3c/wpt_manifest_unittest.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/wpt_manifest_unittest.py b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/wpt_manifest_unittest.py
new file mode 100644
index 0000000000000000000000000000000000000000..a1681f199ef486e58cef087b14a9a1cbfe5b3e99
--- /dev/null
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/wpt_manifest_unittest.py
@@ -0,0 +1,57 @@
+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import unittest
+
+from webkitpy.common.host_mock import MockHost
+from webkitpy.w3c.wpt_manifest import WPTManifest
+
+
+class WPTManifestUnitTest(unittest.TestCase):
+
+    def test_ensure_manifest_copies_new_manifest(self):
+        host = MockHost()
+        manifest_path = '/mock-checkout/third_party/WebKit/LayoutTests/external/wpt/MANIFEST.json'
+
+        self.assertFalse(host.filesystem.exists(manifest_path))
+        WPTManifest.ensure_manifest(host)
+        self.assertTrue(host.filesystem.exists(manifest_path))
+
+        webkit_base = '/mock-checkout/third_party/WebKit'
+        self.assertEqual(
+            host.executive.calls,
+            [
+                [
+                    'python',
+                    webkit_base + '/Tools/Scripts/webkitpy/thirdparty/wpt/wpt/manifest',
+                    '--work',
+                    '--tests-root',
+                    webkit_base + '/LayoutTests/external/wpt',
+                ]
+            ]
+        )
+
+    def test_ensure_manifest_updates_manifest_if_it_exists(self):
+        host = MockHost()
+        manifest_path = '/mock-checkout/third_party/WebKit/LayoutTests/external/wpt/MANIFEST.json'
+
+        host.filesystem.write_binary_file(manifest_path, '{}')
+        self.assertTrue(host.filesystem.exists(manifest_path))
+
+        WPTManifest.ensure_manifest(host)
+        self.assertTrue(host.filesystem.exists(manifest_path))
+
+        webkit_base = '/mock-checkout/third_party/WebKit'
+        self.assertEqual(
+            host.executive.calls,
+            [
+                [
+                    'python',
+                    webkit_base + '/Tools/Scripts/webkitpy/thirdparty/wpt/wpt/manifest',
+                    '--work',
+                    '--tests-root',
+                    webkit_base + '/LayoutTests/external/wpt',
+                ]
+            ]
+        )