Import CSSWG Shapes tests

LayoutTests/imported/web-platform-tests/subresource-integrity/support/generate_javascript.py

+from os import path, listdir
+from hashlib import sha256, md5
+from base64 import urlsafe_b64encode
+import re
+
+JS_DIR = path.normpath(path.join(__file__, "..", ".."))
+
+
+def js_files():
+    '''
+    Yield each file in the javascript directory
+    '''
+    for f in listdir(JS_DIR):
+        if path.isfile(f) and f.endswith(".js"):
+            yield f
+
+
+def format_digest(digest):
+    '''
+    URL-safe base64 encode a binary digest and strip any padding.
+    '''
+    return urlsafe_b64encode(digest).rstrip("=")
+
+
+def sha256_uri(content):
+    '''
+    Generate an encoded sha256 URI.
+    '''
+    return "ni:///sha-256;%s" % format_digest(sha256(content).digest())
+
+
+def md5_uri(content):
+    '''
+    Generate an encoded md5 digest URI.
+    '''
+    return "ni:///md5;%s" % format_digest(md5(content).digest())
+
+
+def main():
+    for file in js_files():
+        base = path.splitext(path.basename(file))[0]
+        var_name = re.sub(r"[^a-z]", "_", base)
+        content = "%s=true;" % var_name
+        with open(file, "w") as f:
+            f.write(content)
+
+
+if __name__ == "__main__":
+    main()