Fix the remaining error message asserting tests

Author: byroot

ext/json/ext/parser/parser.c

@@ -891,15 +891,15 @@ static VALUE json_parse_any(JSON_ParserState *state)
                 return PUSH(Qnil);
             }
 
-            raise_parse_error("unexpected character: %s", state->cursor);
+            raise_parse_error("unexpected token at '%s'", state->cursor);
             break;
         case 't':
             if ((state->end - state->cursor >= 4) && (memcmp(state->cursor, "true", 4) == 0)) {
                 state->cursor += 4;
                 return PUSH(Qtrue);
             }
 
-            raise_parse_error("unexpected character: %s", state->cursor);
+            raise_parse_error("unexpected token at '%s'", state->cursor);
             break;
         case 'f':
             // Note: memcmp with a small power of two compile to an integer comparison
@@ -908,7 +908,7 @@ static VALUE json_parse_any(JSON_ParserState *state)
                 return PUSH(Qfalse);
             }
 
-            raise_parse_error("unexpected character", state->cursor);
+            raise_parse_error("unexpected token at '%s'", state->cursor);
             break;
         case 'N':
             // Note: memcmp with a small power of two compile to an integer comparison
@@ -917,21 +917,25 @@ static VALUE json_parse_any(JSON_ParserState *state)
                 return PUSH(CNaN);
             }
 
-            raise_parse_error("unexpected character: %s", state->cursor);
+            raise_parse_error("unexpected token at '%s'", state->cursor);
             break;
         case 'I':
             if (state->config->allow_nan && (state->end - state->cursor >= 8) && (memcmp(state->cursor, "Infinity", 8) == 0)) {
                 state->cursor += 8;
                 return PUSH(CInfinity);
             }
 
-            raise_parse_error("unexpected character", state->cursor);
+            raise_parse_error("unexpected token at '%s'", state->cursor);
             break;
         case '-':
             // Note: memcmp with a small power of two compile to an integer comparison
-            if (state->config->allow_nan && (state->end - state->cursor >= 9) && (memcmp(state->cursor + 1, "Infinity", 8) == 0)) {
-                state->cursor += 9;
-                return PUSH(CMinusInfinity);
+            if ((state->end - state->cursor >= 9) && (memcmp(state->cursor + 1, "Infinity", 8) == 0)) {
+                if (state->config->allow_nan) {
+                    state->cursor += 9;
+                    return PUSH(CMinusInfinity);
+                } else {
+                    raise_parse_error("unexpected token at '%s'", state->cursor);
+                }
             }
             // Fallthrough
         case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': {

test/json/json_parser_test.rb

@@ -625,7 +625,7 @@ def test_parse_error_incomplete_hash
       JSON.parse('{"input":{"firstName":"Bob","lastName":"Mob","email":"[email protected]"}')
     end
     if RUBY_ENGINE == "ruby"
-      assert_equal %(unexpected token at '{"input":{"firstName":"Bob","las'), error.message
+      assert_equal %(expected ',' or '}' after object value, got: ''), error.message
     end
   end