fix: Read from STDIN

Fixes ietf-tools#36

Author: kesara

svgcheck/run.py

@@ -107,7 +107,7 @@ def main():
         wp.color_threshold = options.grey_level
 
     if len(args) < 1:
-        source = os.getcwd() + "/stdin"
+        source = "/dev/stdin"
     else:
         source = args[0]
         if not os.path.exists(source):

svgcheck/test.py

@@ -67,6 +67,14 @@ def test_clear_cache(self):
                       None, None)
         self.assertFalse(os.path.exists('Temp/cache/reference.RFC.1847.xml'))
 
+    def test_stdin(self):
+        process = subprocess.Popen([sys.executable, test_program],
+                                   stdin=subprocess.PIPE,
+                                   stderr=subprocess.PIPE)
+        _, stderr_data = process.communicate(input=b"<svvvvvg/>")
+        self.assertEqual(stderr_data.decode("utf-8").strip(),
+                         'INFO: File conforms to SVG requirements.')
+
 
 class TestParserMethods(unittest.TestCase):