Reland "[test] Fix cctest path separators on Windows"

test/mozilla/testcfg.py

Index: test/mozilla/testcfg.py
diff --git a/test/mozilla/testcfg.py b/test/mozilla/testcfg.py
index 70a7ac663cde287e87f73808dd1fed2d96f41139..c6bfc1fda8546bc917f8f9851e845d18ab89f6d7 100644
--- a/test/mozilla/testcfg.py
+++ b/test/mozilla/testcfg.py
@@ -81,8 +81,9 @@ class MozillaTestSuite(testsuite.TestSuite):
         files.sort()
         for filename in files:
           if filename.endswith(".js") and not filename in FRAMEWORK:
-            testname = os.path.join(dirname[len(self.testroot) + 1:],
-                                    filename[:-3])
+            fullpath = os.path.join(dirname, filename)
+            relpath = fullpath[len(self.testroot) + 1 : -3]
+            testname = relpath.replace(os.path.sep, "/")
             case = testcase.TestCase(self, testname)
             tests.append(case)
     return tests
@@ -93,7 +94,7 @@ class MozillaTestSuite(testsuite.TestSuite):
     result += ["--expose-gc"]
     result += [os.path.join(self.root, "mozilla-shell-emulation.js")]
     testfilename = testcase.path + ".js"
-    testfilepath = testfilename.split(os.path.sep)
+    testfilepath = testfilename.split("/")
     for i in xrange(len(testfilepath)):
       script = os.path.join(self.testroot,
                             reduce(os.path.join, testfilepath[:i], ""),

[Michael Achenbach, 2015/09/17 12:49:19]

Fly-by code spottin:
reduce(os.path.join, testfilepath[:i], "")
should be the same as
os.path.join(*testfilepath[:i])