[WebUI] Add some presubmit checks

chrome/browser/resources/test_presubmit.py

Index: chrome/browser/resources/test_presubmit.py
diff --git a/chrome/browser/resources/test_presubmit.py b/chrome/browser/resources/test_presubmit.py
new file mode 100755
index 0000000000000000000000000000000000000000..226ce73210b6c4c23aa86bb0049acb26345d9587
--- /dev/null
+++ b/chrome/browser/resources/test_presubmit.py
@@ -0,0 +1,264 @@
+#!/usr/bin/env python
+# Copyright (c) 2012 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.
+
+"""Unit tests for Web Development Style Guide checker."""
+
+import os
+import re
+import sys
+import unittest
+
+test_dir = os.path.dirname(os.path.abspath(__file__))
+sys.path.extend([
+    os.path.normpath(os.path.join(test_dir, '..', '..', '..', 'tools')),
+    os.path.join(test_dir),
+])
+
+import find_depot_tools # pylint: disable=W0611
+from testing_support.super_mox import SuperMoxTestBase
+from web_dev_style import css_checker # pylint: disable=F0401
+
+
+class WebDevStyleGuideTest(SuperMoxTestBase):
+  def setUp(self):
+    SuperMoxTestBase.setUp(self)
+
+    self.fake_file_name = 'fake.css'
+
+    self.fake_file = self.mox.CreateMockAnything()
+    self.mox.StubOutWithMock(self.fake_file, 'LocalPath')
+    self.fake_file.LocalPath().AndReturn(self.fake_file_name)
+    # Actual calls to NewContents() are defined in each test.
+    self.mox.StubOutWithMock(self.fake_file, 'NewContents')
+
+    self.input_api = self.mox.CreateMockAnything()
+    self.input_api.re = re
+    self.mox.StubOutWithMock(self.input_api, 'AffectedSourceFiles')
+    self.input_api.AffectedFiles(
+        include_deletes=False, file_filter=None).AndReturn([self.fake_file])
+
+    # Actual creations of PresubmitNotifyResult are defined in each test.
+    self.output_api = self.mox.CreateMockAnything()
+    self.mox.StubOutWithMock(self.output_api, 'PresubmitNotifyResult',
+                                  use_mock_anything=True)
+
+  def VerifyContentsProducesOutput(self, contents, output):
+    self.fake_file.NewContents().AndReturn(contents.splitlines())
+    self.output_api.PresubmitNotifyResult(
+        self.fake_file_name + ':\n' + output.strip()).AndReturn(None)
+    self.mox.ReplayAll()
+    css_checker.CSSChecker(self.input_api, self.output_api).RunChecks()
+
+  def testCssAlphaWithAtBlock(self):
+    self.VerifyContentsProducesOutput("""
+/* A hopefully safely ignored comment and @media statement. /**/
+@media print {
+  div {
+    display: block;
+    color: red;
+  }
+}""", """
+- Alphabetize properties and list vendor specific (i.e. -webkit) above standard.
+    display: block;
+    color: red;""")
+
+  def testCssAlphaWithNonStandard(self):
+    self.VerifyContentsProducesOutput("""
+div {
+  /* A hopefully safely ignored comment and @media statement. /**/
+  color: red;
+  -webkit-margin-start: 5px;
+}""", """
+- Alphabetize properties and list vendor specific (i.e. -webkit) above standard.
+    color: red;
+    -webkit-margin-start: 5px;""")
+
+  def testCssAlphaWithLongerDashedProps(self):
+    self.VerifyContentsProducesOutput("""
+div {
+  border-left: 5px;  /* A hopefully removed comment. */
+  border: 5px solid red;
+}""", """
+- Alphabetize properties and list vendor specific (i.e. -webkit) above standard.
+    border-left: 5px;
+    border: 5px solid red;""")
+
+  def testCssBracesHaveSpaceBeforeAndNothingAfter(self):
+    self.VerifyContentsProducesOutput("""
+/* Hello! */div/* Comment here*/{
+  display: block;
+}
+
+blah /* hey! */
+{
+  rule: value;
+}
+
+.this.is { /* allowed */
+  rule: value;
+}""", """
+- Start braces ({) end a selector, have a space before them and no rules after.
+    div{
+    {""")
+
+  def testCssClassesUseDashes(self):
+    self.VerifyContentsProducesOutput("""
+.className,
+.ClassName,
+.class-name /* We should not catch this. */,
+.class_name {
+  display: block;
+}""", """
+ - Classes use .dash-form.
+    .className,
+    .ClassName,
+    .class_name {""")
+
+  def testCssCloseBraceOnNewLine(self):
+    self.VerifyContentsProducesOutput("""
+@media { /* TODO(dbeam) Fix this case.
+  .rule {
+    display: block;
+  }}
+
+#rule {
+  rule: value; }""", """
+- Always put a rule closing brace (}) on a new line.
+    rule: value; }""")
+
+  def testCssColonsHaveSpaceAfter(self):
+    self.VerifyContentsProducesOutput("""
+div:not(.class):not([attr]) /* We should not catch this. */ {
+  display:block;
+}""", """
+- Colons (:) should have a space after them.
+    display:block;""")
+
+  def testCssFavorSingleQuotes(self):
+    self.VerifyContentsProducesOutput("""
+html[dir="rtl"] body,
+html[dir=ltr] body /* TODO(dbeam): Require '' around rtl in future? */ {
+  background: url("chrome://resources/BLAH");
+  font-family: "Open Sans";
+}""", """
+- Use single quotes (') instead of double quotes (") in strings.
+    html[dir="rtl"] body,
+    background: url("chrome://resources/BLAH");
+    font-family: "Open Sans";""")
+
+  def testCssHexCouldBeShorter(self):
+    self.VerifyContentsProducesOutput("""
+#abc,
+#abc-,
+#abc-ghij,
+#abcdef-,
+#abcdef-ghij,
+#aaaaaa,
+#bbaacc {
+  color: #999999;
+  color: #666;
+}""", """
+- Use abbreviated hex (#rgb) when in form #rrggbb.
+    color: #999999; (replace with #999)""")
+
+  def testCssUseMillisecondsForSmallTimes(self):
+    self.VerifyContentsProducesOutput("""
+.transition-0s /* This is gross but may happen. */ {
+  transform: one 0.2s;
+  transform: two .1s;
+  transform: tree 1s;
+  transform: four 300ms;
+}""", """
+- Use milliseconds for time measurements under 1 second.
+    transform: one 0.2s; (replace with 200ms)
+    transform: two .1s; (replace with 100ms)""")
+
+  def testCssOneRulePerLine(self):
+    self.VerifyContentsProducesOutput("""
+div {
+  rule: value; /* rule: value; */
+  rule: value; rule: value;
+}""", """
+- One rule per line (what not to do: color: red; margin: 0;).
+    rule: value; rule: value;""")
+
+  def testCssOneSelectorPerLine(self):
+    self.VerifyContentsProducesOutput("""
+a,
+div,a,
+div,/* Hello! */ span,
+#id.class([dir=rtl):not(.class):any(a, b, d) {
+  rule: value;
+}""", """
+- One selector per line (what not to do: a, b {}).
+    div,a,
+    div, span,""")
+
+
+  def testCssRgbIfNotGray(self):
+    self.VerifyContentsProducesOutput("""
+#abc,
+#aaa,
+#aabbcc {
+  background: -webkit-linear-gradient(left, from(#abc), to(#def));
+  color: #bad;
+  color: #bada55;
+}""", """
+- Use rgb() over #hex when not a shade of gray (like #333).
+    background: -webkit-linear-gradient(left, from(#abc), to(#def)); """
+"""(replace with rgb(170, 187, 204), rgb(221, 238, 255))
+    color: #bad; (replace with rgb(187, 170, 221))
+    color: #bada55; (replace with rgb(186, 218, 85))""")
+
+  def testCssZeroLengthTerms(self):
+    self.VerifyContentsProducesOutput("""
+@-webkit-keyframe anim {
+  0% { /* Ignore key frames */
+    width: 0px;
+  }
+  10% {
+    width: 10px;
+  }
+  100% {
+    width: 100px;
+  }
+}
+.animating {
+  -webkit-animation: anim 0s;
+  -webkit-animation-duration: anim 0ms;
+  -webkit-transform: scale(0%),
+                     translateX(0deg),
+                     translateY(0rad),
+                     translateZ(0grad);
+  background-position-x: 0em;
+  background-position-y: 0ex;
+  border-width: 0em;
+  color: hsl(0, 0%, 85%); /* Shouldn't trigger error. */
+}
+
+@page {
+  border-width: 0mm;
+  height: 0cm;
+  width: 0in;
+}""", """
+- Make all zero length terms (i.e. 0px) 0 unless inside of hsl() or part of"""
+""" @keyframe.
+    width: 0px;
+    -webkit-animation: anim 0s;
+    -webkit-animation-duration: anim 0ms;
+    -webkit-transform: scale(0%),
+    translateX(0deg),
+    translateY(0rad),
+    translateZ(0grad);
+    background-position-x: 0em;
+    background-position-y: 0ex;
+    border-width: 0em;
+    border-width: 0mm;
+    height: 0cm;
+    width: 0in;
+""")
+
+if __name__ == '__main__':
+  unittest.main()