This changes variable expansion so that it is recursive

tests/run_tests.py

Index: tests/run_tests.py
===================================================================
--- tests/run_tests.py	(revision 0)
+++ tests/run_tests.py	(revision 0)
@@ -0,0 +1,83 @@
+#!/usr/bin/env python
+
+import difflib
+import os
+import subprocess
+import sys
+
+# Returns file contents as a list of lines.
+def GetFileContents(filename, test_name):
+  try:
+    fd = open(filename, "r")
+  except IOError:
+    print "Unable to open %s for test %s" % (filename, test_name)
+    return False
+  output = fd.read().splitlines()
+  fd.close()
+  return output
+
+def RunTest(test_name, golden_file):
+  gyp_script = os.path.normpath(
+    os.path.join(os.path.dirname(sys.argv[0]), '../gyp'))
+
+  p = subprocess.Popen(['python', gyp_script, '--depth', '..', test_name,
+                        '--debug', 'variables', '--debug', 'general',
+                        '--format', 'gypd'],
+                       shell=(sys.platform == 'win32'), stdin=subprocess.PIPE,
+                       stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
+  (p_stdout, p_stderr) = p.communicate('')
+  if p_stderr:
+    print "Test %s FAILED to execute: with error output" % (test_name)
+    print "Error output was:\n%s" % p_stdout
+    print "Output was:\n%s" % p_stdout
+    return False
+
+  p_stdout = p_stdout.splitlines()
+
+  golden = GetFileContents(golden_file, test_name)
+
+  if golden != p_stdout:
+    print "Test %s FAILED: output doesn't match golden file %s" % (test_name,
+                                                                   golden_file)
+    print "Difference is:"
+    for d in difflib.context_diff(p_stdout, golden):
+      print d
+    return False
+
+  # Now we check to see that the gypd output matches the golden file.
+  golden = GetFileContents(test_name + 'd.golden', test_name)
+  gypd = GetFileContents(test_name + 'd', test_name)
+
+  if golden != gypd:
+    print 'Test %s FAILED: GYPD output ' \
+          'does not match golden file (%s)' % (test_name, golden_file)
+    print "Difference is:"
+    for d in difflib.context_diff(gypd, golden):
+      print d
+    return False
+
+  return True
+
+if __name__ == '__main__':
+  tests = [
+    ('test1/test1.gyp', 'test1.golden'),
+    ]
+  failures = 0
+  for test in tests:
+    if not RunTest(test[0], test[1]):
+      failures = failures + 1
+  if failures > 0:
+    fail_plural = ""
+    if failures != 1:
+      fail_plural = "s"
+    print "%d test%s FAILED" % (failures, fail_plural)
+    successes = len(tests) - failures
+    success_plural = ""
+    if successes != 1:
+      success_plural = "s"
+    print "%d test%s SUCCEEDED" % (successes, success_plural)
+    sys.exit(2)
+  else:
+    print "ALL %d tests SUCCEEDED" % len(tests)
+    sys.exit(0)