test: check if key exists in locals as text, issue #102

Author: Scrum

test/fixtures/conditional_if_key_not_exists.html

@@ -1,3 +1,8 @@
 <if condition="key_not_exists">
   it works!
 </if>
+
+<if condition="key_not_exists">
+  {{ key_not_exists.foo }}
+  it works!
+</if>