Add tests for third_party/closure_compiler/compile.py

third_party/closure_compiler/compile.py

 #!/usr/bin/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.
 
 """Runs Closure compiler on JavaScript files to check for errors and produce
 minified output."""
 
 import argparse
 import os
@@ skipping 252 matching lines @@
       output_wrapper: Wraps output into this string at the place denoted by the
           marker token %output%.
 
     Returns:
       (errors, stderr) A parsed list of errors (strings) found by the compiler
           and the raw stderr (as a string).
     """
     args = ["--js=%s" % s for s in sources]
 
     if out_file:
+      out_dir = os.path.dirname(out_file)
+      if not os.path.exists(out_dir):
+        os.makedirs(out_dir)
       args += ["--js_output_file=%s" % out_file]
       args += ["--create_source_map=%s" % (self._MAP_FILE_FORMAT % out_file)]
 
     if externs:
       args += ["--externs=%s" % e for e in externs]
 
     if output_wrapper:
       args += ['--output_wrapper="%s"' % output_wrapper]
 
     args_file_content = " %s" % " ".join(self._common_args() + args)
@@ skipping 129 matching lines @@
   opts = parser.parse_args()
 
   depends = opts.depends or []
   externs = set(opts.externs or [])
 
   polymer_externs = os.path.join(os.path.dirname(_CURRENT_DIR), 'polymer',
                                  'v0_8', 'components-chromium',
                                  'polymer-externs', 'polymer.externs.js')
   externs.add(polymer_externs)
 
-  if opts.out_file:
-    out_dir = os.path.dirname(opts.out_file)
-    if not os.path.exists(out_dir):
-      os.makedirs(out_dir)
-
   checker = Checker(verbose=opts.verbose, strict=opts.strict)
   if opts.single_file:
     for source in opts.sources:
       depends, externs = build.inputs.resolve_recursive_dependencies(
           source, depends, externs)
       found_errors, _ = checker.check(source, out_file=opts.out_file,
                                       depends=depends, externs=externs,
                                       output_wrapper=opts.output_wrapper)
       if found_errors:
         sys.exit(1)
   else:
     found_errors, stderr = checker.check_multiple(
         opts.sources,
         out_file=opts.out_file,
         output_wrapper=opts.output_wrapper,
         externs=externs)
     if found_errors:
       print stderr
       sys.exit(1)
 
   if opts.success_stamp:
     with open(opts.success_stamp, "w"):
       os.utime(opts.success_stamp, None)