Merge pull request #202 from mikemoritz/mikemoritz-empty-patternprops

Check for empty patternProperties

Author: horejsek

fastjsonschema/draft04.py

@@ -530,7 +530,10 @@ def generate_pattern_properties(self):
         self.create_variable_is_dict()
         with self.l('if {variable}_is_dict:'):
             self.create_variable_keys()
-            for pattern, definition in self._definition['patternProperties'].items():
+            pattern_prop_definition = self._definition['patternProperties']
+            if pattern_prop_definition == {}:
+                return
+            for pattern, definition in pattern_prop_definition.items():
                 self._compile_regexps[pattern] = re.compile(pattern)
             with self.l('for {variable}_key, {variable}_val in {variable}.items():'):
                 for pattern, definition in self._definition['patternProperties'].items():

tests/test_pattern_properties.py

@@ -69,3 +69,10 @@ def test_pattern_with_escape_no_warnings(asserter):
                 '\\w+': {'type': 'object'}
             }
         }, value, value)
+
+def test_empty_pattern(asserter):
+    value = {}
+    asserter({
+        'type': 'object',
+        'patternProperties': {}
+    }, value, value)