compdb: escape control characters in JSON strings

1 files changed, 40 insertions, 0 deletions

diff --git a/src/json_test.cc b/src/json_test.cc
new file mode 100644
index 0000000..b4afc73
--- /dev/null
+++ b/src/json_test.cc
@@ -0,0 +1,40 @@
+// Copyright 2021 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "json.h"
+
+#include "test.h"
+
+TEST(JSONTest, RegularAscii) {
+  EXPECT_EQ(EncodeJSONString("foo bar"), "foo bar");
+}
+
+TEST(JSONTest, EscapedChars) {
+  EXPECT_EQ(EncodeJSONString("\"\\\b\f\n\r\t"),
+            "\\\""
+            "\\\\"
+            "\\b\\f\\n\\r\\t");
+}
+
+// codepoints between 0 and 0x1f should be escaped
+TEST(JSONTest, ControlChars) {
+  EXPECT_EQ(EncodeJSONString("\x01\x1f"), "\\u0001\\u001f");
+}
+
+// Leave them alone as JSON accepts unicode literals
+// out of control character range
+TEST(JSONTest, UTF8) {
+  const char* utf8str = "\xe4\xbd\xa0\xe5\xa5\xbd";
+  EXPECT_EQ(EncodeJSONString(utf8str), utf8str);
+}