servo: Merge #10590 - Package tidy (from edunham:package-tidy); r=larsbergstrom

This fixes https://github.com/servo/servo/issues/861.

@askeing, I've copied your work from https://github.com/askeing/servo_tidy and attributed the commit to you. My commit in this PR is Git housekeeping to preserve `tidy`'s history. If you'd like to make additional changes, I've given you and @shinglyu push access to my fork of Servo. Apologies if this is already familiar, but the workflow for pushing to my branch is:

```
$ git remote add edunham git@github.com:edunham/servo.git
$ git checkout -b package-tidy
$ git pull edunham package-tidy
$ git push edunham package-tidy
```

Once this lands, I'll look at how to publish it to PyPI and automate that process.

Please don't merge this yet; we still need to discuss how the change should work around https://github.com/servo/servo/blob/master/python/servo/testing_commands.py#L33 , as I've yet to figure out how to get the egg to actually expose its tests.

Source-Repo: https://github.com/servo/servo
Source-Revision: bfe54539d290cb287e59e8ba106a54a3fab6201a

servo/python/tidy/servo_tidy_tests/__init__.py

@@ -0,0 +1,8 @@
+# Copyright 2013 The Servo Project Developers. See the COPYRIGHT
+# file at the top-level directory of this distribution.
+#
+# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+# option. This file may not be copied, modified, or distributed
+# except according to those terms.

servo/python/tidy/servo_tidy_tests/incorrect_license.rs

@@ -0,0 +1 @@
+/* Incorrect license here */

servo/python/tidy/servo_tidy_tests/long_line.rs

@@ -0,0 +1,5 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+println!("really really loooooooooooooooooooooooooooooooooooooooooooong  lineeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee");

servo/python/tidy/servo_tidy_tests/rust_tidy.rs

@@ -0,0 +1,37 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use    app_units::Au;
+use azure::azure_hl::{AntialiasMode, Color,
+ColorPattern, CompositionOp};
+use euclid::size::Size2D;
+use azure::azure::AzIntSize;
+
+use std;
+
+mod paint_context;
+pub mod display_list;
+mod test::{
+};
+
+extern crate webrender_traits;
+extern crate style_traits;
+
+impl test {
+
+    fn test_fun(y:f32)->f32{
+        let x=5;
+        x = x-1;
+        x = x*x;
+        let z = match y {
+            1 =>2,
+            2 => 1,
+        };
+        let z = &Vec<T>;
+    }
+
+    fn test_fun2(y : &String, z : &Vec<f32>) -> f32 {
+        1
+    }
+}

servo/python/tidy/servo_tidy_tests/spec.webidl

@@ -0,0 +1,10 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+interface Test {
+  [SameObject ]
+  readonly attribute Node root;
+};

servo/python/tidy/servo_tidy_tests/speclink.rs

@@ -0,0 +1,9 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+impl SpecLinkMethods for SpecLink {
+    fn Test(&self) -> f32 {
+        0
+    }
+}

servo/python/tidy/servo_tidy_tests/test.toml

@@ -0,0 +1,5 @@
+[package]
+name = "test"
+version = "*"
+authors = ["The Servo Project Developers"]
+publish = false

servo/python/tidy/servo_tidy_tests/test_tidy.py

@@ -0,0 +1,75 @@
+# Copyright 2013 The Servo Project Developers. See the COPYRIGHT
+# file at the top-level directory of this distribution.
+#
+# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+# option. This file may not be copied, modified, or distributed
+# except according to those terms.
+
+import os
+import unittest
+from servo_tidy import tidy
+
+
+def iterFile(name):
+    path = 'servo_tidy_tests/' if os.path.exists('servo_tidy_tests/') else 'python/tidy/servo_tidy_tests/'
+    return iter([os.path.join(path, name)])
+
+
+class CheckTidiness(unittest.TestCase):
+    def test_spaces_correctnes(self):
+        errors = tidy.collect_errors_for_files(iterFile('wrong_space.rs'), [], [tidy.check_by_line])
+        self.assertEqual('trailing whitespace', errors.next()[2])
+        self.assertEqual('no newline at EOF', errors.next()[2])
+        self.assertEqual('tab on line', errors.next()[2])
+        self.assertEqual('CR on line', errors.next()[2])
+
+    def test_long_line(self):
+        errors = tidy.collect_errors_for_files(iterFile('long_line.rs'), [], [tidy.check_by_line])
+        self.assertEqual('Line is longer than 120 characters', errors.next()[2])
+
+    def test_whatwg_link(self):
+        errors = tidy.collect_errors_for_files(iterFile('whatwg_link.rs'), [], [tidy.check_by_line])
+        self.assertTrue('link to WHATWG may break in the future, use this format instead:' in errors.next()[2])
+        self.assertTrue('links to WHATWG single-page url, change to multi page:' in errors.next()[2])
+
+    def test_licence(self):
+        errors = tidy.collect_errors_for_files(iterFile('incorrect_license.rs'), [], [tidy.check_license])
+        self.assertEqual('incorrect license', errors.next()[2])
+
+    def test_rust(self):
+        errors = tidy.collect_errors_for_files(iterFile('rust_tidy.rs'), [], [tidy.check_rust])
+        self.assertEqual('use statement spans multiple lines', errors.next()[2])
+        self.assertEqual('missing space before }', errors.next()[2])
+        self.assertTrue('use statement is not in alphabetical order' in errors.next()[2])
+        self.assertEqual('encountered whitespace following a use statement', errors.next()[2])
+        self.assertTrue('mod declaration is not in alphabetical order' in errors.next()[2])
+        self.assertEqual('mod declaration spans multiple lines', errors.next()[2])
+        self.assertTrue('extern crate declaration is not in alphabetical order' in errors.next()[2])
+        self.assertEqual('missing space before ->', errors.next()[2])
+        self.assertEqual('missing space after ->', errors.next()[2])
+        self.assertEqual('missing space after :', errors.next()[2])
+        self.assertEqual('missing space before {', errors.next()[2])
+        self.assertEqual('missing space before =', errors.next()[2])
+        self.assertEqual('missing space after =', errors.next()[2])
+        self.assertEqual('missing space before -', errors.next()[2])
+        self.assertEqual('missing space before *', errors.next()[2])
+        self.assertEqual('missing space after =>', errors.next()[2])
+        self.assertEqual('extra space before :', errors.next()[2])
+        self.assertEqual('extra space before :', errors.next()[2])
+        self.assertEqual('use &[T] instead of &Vec<T>', errors.next()[2])
+        self.assertEqual('use &str instead of &String', errors.next()[2])
+
+    def test_webidl(self):
+        errors = tidy.collect_errors_for_files(iterFile('spec.webidl'), [tidy.check_webidl_spec], [])
+        self.assertEqual('No specification link found.', errors.next()[2])
+
+    def test_toml(self):
+        errors = tidy.collect_errors_for_files(iterFile('test.toml'), [tidy.check_toml], [])
+        self.assertEqual('found asterisk instead of minimum version number', errors.next()[2])
+
+
+def do_tests():
+    suite = unittest.TestLoader().loadTestsFromTestCase(CheckTidiness)
+    unittest.TextTestRunner(verbosity=2).run(suite)

servo/python/tidy/servo_tidy_tests/tidy_self_test.py

@@ -0,0 +1,78 @@
+# Copyright 2013 The Servo Project Developers. See the COPYRIGHT
+# file at the top-level directory of this distribution.
+#
+# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+# option. This file may not be copied, modified, or distributed
+# except according to those terms.
+
+import unittest
+import tidy
+
+
+def iterFile(name):
+    return iter(['python/tidy_self_test/' + name])
+
+
+class CheckTidiness(unittest.TestCase):
+    def test_spaces_correctnes(self):
+        errors = tidy.collect_errors_for_files(iterFile('wrong_space.rs'), [], [tidy.check_by_line])
+        self.assertEqual('trailing whitespace', errors.next()[2])
+        self.assertEqual('no newline at EOF', errors.next()[2])
+        self.assertEqual('tab on line', errors.next()[2])
+        self.assertEqual('CR on line', errors.next()[2])
+
+    def test_long_line(self):
+        errors = tidy.collect_errors_for_files(iterFile('long_line.rs'), [], [tidy.check_by_line])
+        self.assertEqual('Line is longer than 120 characters', errors.next()[2])
+
+    def test_whatwg_link(self):
+        errors = tidy.collect_errors_for_files(iterFile('whatwg_link.rs'), [], [tidy.check_by_line])
+        self.assertTrue('link to WHATWG may break in the future, use this format instead:' in errors.next()[2])
+        self.assertTrue('links to WHATWG single-page url, change to multi page:' in errors.next()[2])
+
+    def test_licence(self):
+        errors = tidy.collect_errors_for_files(iterFile('incorrect_license.rs'), [], [tidy.check_license])
+        self.assertEqual('incorrect license', errors.next()[2])
+
+    def test_rust(self):
+        errors = tidy.collect_errors_for_files(iterFile('rust_tidy.rs'), [], [tidy.check_rust])
+        self.assertEqual('use statement spans multiple lines', errors.next()[2])
+        self.assertEqual('missing space before }', errors.next()[2])
+        self.assertTrue('use statement is not in alphabetical order' in errors.next()[2])
+        self.assertEqual('encountered whitespace following a use statement', errors.next()[2])
+        self.assertTrue('mod declaration is not in alphabetical order' in errors.next()[2])
+        self.assertEqual('mod declaration spans multiple lines', errors.next()[2])
+        self.assertTrue('extern crate declaration is not in alphabetical order' in errors.next()[2])
+        self.assertEqual('missing space before ->', errors.next()[2])
+        self.assertEqual('missing space after ->', errors.next()[2])
+        self.assertEqual('missing space after :', errors.next()[2])
+        self.assertEqual('missing space before {', errors.next()[2])
+        self.assertEqual('missing space before =', errors.next()[2])
+        self.assertEqual('missing space after =', errors.next()[2])
+        self.assertEqual('missing space before -', errors.next()[2])
+        self.assertEqual('missing space before *', errors.next()[2])
+        self.assertEqual('missing space after =>', errors.next()[2])
+        self.assertEqual('extra space before :', errors.next()[2])
+        self.assertEqual('extra space before :', errors.next()[2])
+        self.assertEqual('use &[T] instead of &Vec<T>', errors.next()[2])
+        self.assertEqual('use &str instead of &String', errors.next()[2])
+
+    def test_spec_link(self):
+        tidy.spec_base_path = "python/tidy_self_test/"
+        errors = tidy.collect_errors_for_files(iterFile('speclink.rs'), [], [tidy.check_spec])
+        self.assertEqual('method declared in webidl is missing a comment with a specification link', errors.next()[2])
+
+    def test_webidl(self):
+        errors = tidy.collect_errors_for_files(iterFile('spec.webidl'), [tidy.check_webidl_spec], [])
+        self.assertEqual('No specification link found.', errors.next()[2])
+
+    def test_toml(self):
+        errors = tidy.collect_errors_for_files(iterFile('test.toml'), [tidy.check_toml], [])
+        self.assertEqual('found asterisk instead of minimum version number', errors.next()[2])
+
+
+def do_tests():
+    suite = unittest.TestLoader().loadTestsFromTestCase(CheckTidiness)
+    unittest.TextTestRunner(verbosity=2).run(suite)

servo/python/tidy/servo_tidy_tests/whatwg_link.rs

@@ -0,0 +1,6 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// https://html.spec.whatwg.org/multipage/scripting.html#dom-context-2d-putimagedata
+// https://html.spec.whatwg.org/#typographic-conventions

servo/python/tidy/servo_tidy_tests/wrong_space.rs

@@ -0,0 +1,7 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+pub struct TestStruct( 
+    pub testMember1: usize,
+	pub testMember2: bool,