horejsek#29 Fix string in const

Author: horejsek

CHANGELOG.txt

@@ -1,6 +1,7 @@
 === 2.4 (unreleased)
 
 * Fix overriding variables (in pattern properties, property names, unique items and contains)
+* Fix string in const
 
 
 === 2.3 (2018-09-14) ===

fastjsonschema/draft06.py

@@ -170,5 +170,8 @@ def generate_const(self):
 
         Only valid value is 42 in this example.
         """
-        with self.l('if {variable} != {}:', self._definition['const']):
+        const = self._definition['const']
+        if isinstance(const, str):
+            const = '"{}"'.format(const)
+        with self.l('if {variable} != {}:', const):
             self.l('raise JsonSchemaException("{name} must be same as const definition")')

tests/test_const.py

@@ -0,0 +1,14 @@
+import pytest
+
+
+@pytest.mark.parametrize('value', (
+    'foo',
+    42,
+    False,
+    [1, 2, 3]
+))
+def test_const(asserter, value):
+    asserter({
+        '$schema': 'http://json-schema.org/draft-06/schema',
+        'const': value,
+    }, value, value)