1 files changed, 40 insertions, 1 deletions
diff --git a/xpcom/idl-parser/xpidl/runtests.py b/xpcom/idl-parser/xpidl/runtests.py
index 2dd269dfd9..b889d40010 100755
--- a/xpcom/idl-parser/xpidl/runtests.py
+++ b/xpcom/idl-parser/xpidl/runtests.py
@@ -5,6 +5,8 @@
 #
 # Unit tests for xpidl.py
 
+import json
+import os
 import sys
 
 # Hack: the first entry in sys.path is the directory containing the script.
@@ -16,7 +18,7 @@ import unittest
 
 import mozunit
 
-from xpidl import header, xpidl
+from xpidl import header, typescript, xpidl
 
 
 class TestParser(unittest.TestCase):
@@ -253,5 +255,42 @@ attribute long bar;
             self.assertEqual(e.args[0], ("cannot find symbol 'Y'"))
 
 
+class TestTypescript(unittest.TestCase):
+    """A few basic smoke tests for typescript generation."""
+
+    dir = os.path.dirname(__file__)
+    src = os.path.join(dir, "..", "..", "..")
+
+    # We use the xpctest.xpt *.idl files from:
+    tests_dir = os.path.join(src, "js/xpconnect/tests/idl")
+    files = [
+        "xpctest_attributes.idl",
+        "xpctest_bug809674.idl",
+        "xpctest_cenums.idl",
+        "xpctest_interfaces.idl",
+        "xpctest_params.idl",
+        "xpctest_returncode.idl",
+        "xpctest_utils.idl",
+    ]
+
+    fixtures = os.path.join(dir, "fixtures")
+    inc_dirs = [os.path.join(src, "xpcom/base")]
+
+    def setUp(self):
+        self.parser = xpidl.IDLParser()
+
+    def test_d_json(self):
+        mods = []
+        for file in self.files:
+            path = os.path.join(self.tests_dir, file)
+            idl = self.parser.parse(open(path).read(), path)
+            idl.resolve(self.inc_dirs, self.parser, {})
+            mods.append(typescript.ts_source(idl))
+
+        result = json.dumps(mods, indent=2, sort_keys=True)
+        expected = open(os.path.join(self.fixtures, "xpctest.d.json")).read()
+        self.assertEqual(result, expected, "types data json does not match")
+
+
 if __name__ == "__main__":
     mozunit.main(runwith="unittest")