Fixed bug in parser when "null", "true" or "false" is mispelled

test/JsonParser_Array_Tests.cpp

@@ -143,6 +143,21 @@ TEST_F(JsonParser_Array_Tests, TwoNulls) {
   secondElementMustBe(nullCharPtr);
 }
 
+TEST_F(JsonParser_Array_Tests, IncompleteNull) {
+  whenInputIs("[nul!]");
+  parseMustFail();
+}
+
+TEST_F(JsonParser_Array_Tests, IncompleteTrue) {
+  whenInputIs("[tru!]");
+  parseMustFail();
+}
+
+TEST_F(JsonParser_Array_Tests, IncompleteFalse) {
+  whenInputIs("[fals!]");
+  parseMustFail();
+}
+
 TEST_F(JsonParser_Array_Tests, TwoStrings) {
   whenInputIs("[\"hello\",\"world\"]");