servo: Merge #9459 - Add mach test-webidl command (from shinglyu:testwebidl); r=Wafflespeanut

I updated the `WebIDL.py` from latest mozilla-central. And add a `./mach test-webidl` command. For #9397

Source-Repo: https://github.com/servo/servo
Source-Revision: 0ada7f9c8eda9879b5536cea3266c94214f9ce9b

servo/components/script/dom/bindings/codegen/parser/WebIDL.py

@@ -501,6 +501,10 @@ class IDLExposureMixins():
     def isExposedInWindow(self):
         return 'Window' in self.exposureSet
 
+    def isExposedOnMainThread(self):
+        return (self.isExposedInWindow() or
+                self.isExposedInSystemGlobals())
+
     def isExposedInAnyWorker(self):
         return len(self.getWorkerExposureSet()) > 0
 
@@ -564,6 +568,9 @@ class IDLExternalInterface(IDLObjectWithIdentifier, IDLExposureMixins):
     def isJSImplemented(self):
         return False
 
+    def isProbablyShortLivingObject(self):
+        return False
+
     def getNavigatorProperty(self):
         return None
 
@@ -1409,6 +1416,7 @@ class IDLInterface(IDLObjectWithScope, IDLExposureMixins):
                   identifier == "Unforgeable" or
                   identifier == "UnsafeInPrerendering" or
                   identifier == "LegacyEventInit" or
+                  identifier == "ProbablyShortLivingObject" or
                   identifier == "Abstract"):
                 # Known extended attributes that do not take values
                 if not attr.noArguments():
@@ -1523,6 +1531,14 @@ class IDLInterface(IDLObjectWithScope, IDLExposureMixins):
     def isJSImplemented(self):
         return bool(self.getJSImplementation())
 
+    def isProbablyShortLivingObject(self):
+        current = self
+        while current:
+            if current.getExtendedAttribute("ProbablyShortLivingObject"):
+                return True
+            current = current.parent
+        return False
+
     def getNavigatorProperty(self):
         naviProp = self.getExtendedAttribute("NavigatorProperty")
         if not naviProp:

servo/components/script/dom/bindings/codegen/parser/abstract.patch

@@ -1,11 +1,11 @@
 --- WebIDL.py
 +++ WebIDL.py
-@@ -1357,7 +1357,8 @@ class IDLInterface(IDLObjectWithScope, IDLExposureMixins):
-                   identifier == "ChromeOnly" or
+@@ -1416,7 +1416,8 @@
                    identifier == "Unforgeable" or
                    identifier == "UnsafeInPrerendering" or
--                  identifier == "LegacyEventInit"):
-+                  identifier == "LegacyEventInit" or
+                   identifier == "LegacyEventInit" or
+-                  identifier == "ProbablyShortLivingObject"):
++                  identifier == "ProbablyShortLivingObject" or
 +                  identifier == "Abstract"):
                  # Known extended attributes that do not take values
                  if not attr.noArguments():

servo/components/script/dom/bindings/codegen/parser/runtests.py

@@ -20,20 +20,20 @@ class TestHarness(object):
 
     def finish(self):
         if self.verbose or self.printed_intro:
-            print "Finished test %s" % self.test
+            print("Finished test %s" % self.test)
 
     def maybe_print_intro(self):
         if not self.printed_intro:
-            print "Starting test %s" % self.test
+            print("Starting test %s" % self.test)
             self.printed_intro = True
 
     def test_pass(self, msg):
         if self.verbose:
-            print "TEST-PASS | %s" % msg
+            print("TEST-PASS | %s" % msg)
 
     def test_fail(self, msg):
         self.maybe_print_intro()
-        print "TEST-UNEXPECTED-FAIL | %s" % msg
+        print("TEST-UNEXPECTED-FAIL | %s" % msg)
 
     def ok(self, condition, msg):
         if condition:
@@ -46,7 +46,7 @@ class TestHarness(object):
             self.test_pass(msg)
         else:
             self.test_fail(msg)
-            print "\tGot %s expected %s" % (a, b)
+            print("\tGot %s expected %s" % (a, b))
 
 def run_tests(tests, verbose):
     testdir = os.path.join(os.path.dirname(__file__), 'tests')
@@ -63,7 +63,7 @@ def run_tests(tests, verbose):
         try:
             _test.WebIDLTest.__call__(WebIDL.Parser(), harness)
         except Exception, ex:
-            print "TEST-UNEXPECTED-FAIL | Unhandled exception in test %s: %s" % (testpath, ex)
+            print("TEST-UNEXPECTED-FAIL | Unhandled exception in test %s: %s" % (testpath, ex))
             traceback.print_exc()
         finally:
             harness.finish()

servo/components/script/dom/bindings/codegen/parser/update.sh

@@ -1,2 +1,4 @@
 wget https://mxr.mozilla.org/mozilla-central/source/dom/bindings/parser/WebIDL.py?raw=1 -O WebIDL.py
 patch < abstract.patch
+
+# TODO: update test files from https://dxr.mozilla.org/mozilla-central/source/dom/bindings/parser/tests

servo/python/requirements.txt

@@ -10,3 +10,6 @@ toml == 0.9.1
 flake8 == 2.4.1
 pep8 == 1.5.7
 pyflakes == 0.8.0
+
+# For test-webidl
+ply == 3.8

servo/python/servo/testing_commands.py

@@ -232,6 +232,28 @@ class MachCommands(CommandBase):
     def test_tidy(self, faster):
         return tidy.scan(faster)
 
+    @Command('test-webidl',
+             description='Run the WebIDL parser tests',
+             category='testing')
+    @CommandArgument('--quiet', '-q', default=False, action="store_true",
+                     help="Don't print passing tests.")
+    @CommandArgument('tests', default=None, nargs="...",
+                     help="Specific tests to run, relative to the tests directory")
+    def test_webidl(self, quiet, tests):
+        self.ensure_bootstrapped()
+
+        test_file_dir = path.abspath(path.join(PROJECT_TOPLEVEL_PATH, "components", "script",
+                                               "dom", "bindings", "codegen", "parser"))
+        # For the `import WebIDL` in runtests.py
+        sys.path.insert(0, test_file_dir)
+
+        run_file = path.abspath(path.join(test_file_dir, "runtests.py"))
+        run_globals = {"__file__": run_file}
+        execfile(run_file, run_globals)
+
+        verbose = not quiet
+        return run_globals["run_tests"](tests, verbose)
+
     @Command('test-wpt-failure',
              description='Run the web platform tests',
              category='testing')