Lay groudwork to Closure compile JavaScript

third_party/closure_compiler/checker_test.py

+#!/usr/bin/env python
+# Copyright 2014 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 checker import FileCache, Flattener, LineNumber
+
+
+class NodeTest(unittest.TestCase):
+  def __init__(self, *args, **kwargs):
+    unittest.TestCase.__init__(self, *args, **kwargs)
+    self.maxDiff = None
+
+  def setUp(self):
+    FileCache._cache["/debug.js"] = """
+// Copyright 2002 Older Chromium Author dudes.
+function debug(msg) { if (window.DEBUG) alert(msg); }
+""".strip()
+
+    FileCache._cache["/global.js"] = """
+// Copyright 2014 Old Chromium Author dudes.
+<include src="/debug.js">
+var global = 'type checking!';
+""".strip()
+
+    FileCache._cache["/checked.js"] = """
+// Copyright 2028 Future Chromium Author dudes.
+/**
+ * @fileoverview Coolest app ever.
+ * @author Douglas Crockford (douglas@crockford.com)
+ */
+<include src="/global.js">
+debug(global);
+// Here continues checked.js, a swell file.
+""".strip()
+
+    self.flattener_ = Flattener("/checked.js")
+
+  def testInline(self):
+    self.assertMultiLineEqual("""
+// Copyright 2028 Future Chromium Author dudes.
+/**
+ * @fileoverview Coolest app ever.
+ * @author Douglas Crockford (douglas@crockford.com)
+ */
+// Copyright 2014 Old Chromium Author dudes.
+// Copyright 2002 Older Chromium Author dudes.
+function debug(msg) { if (window.DEBUG) alert(msg); }
+var global = 'type checking!';
+debug(global);
+// Here continues checked.js, a swell file.
+""".strip(), self.flattener_.contents)
+
+  def assertLineNumber(self, abs_line, expected_line):
+    actual_line = self.flattener_.get_file_from_line(abs_line)
+    self.assertEqual(expected_line.file, actual_line.file)
+    self.assertEqual(expected_line.line_number, actual_line.line_number)
+
+  def testGetFileFromLine(self):
+    self.assertLineNumber(1, LineNumber("/checked.js", 1))
+    self.assertLineNumber(5, LineNumber("/checked.js", 5))
+    self.assertLineNumber(6, LineNumber("/global.js", 1))
+    self.assertLineNumber(7, LineNumber("/debug.js", 1))
+    self.assertLineNumber(8, LineNumber("/debug.js", 2))
+    self.assertLineNumber(9, LineNumber("/global.js", 3))
+    self.assertLineNumber(10, LineNumber("/checked.js", 7))
+    self.assertLineNumber(11, LineNumber("/checked.js", 8))
+
+
+if __name__ == '__main__':
+  unittest.main()