diff --git a/src/clang_utils.cc b/src/clang_utils.cc
index 278e6d22..cddd2ffc 100644
--- a/src/clang_utils.cc
+++ b/src/clang_utils.cc
@@ -2,6 +2,8 @@
 
 #include "platform.h"
 
+#include <doctest/doctest.h>
+
 namespace {
 
 lsRange GetLsRangeForFixIt(const CXSourceRange& range) {
@@ -126,6 +128,7 @@ std::vector<lsTextEdit> ConvertClangReplacementsIntoTextEdits(
   }
   return text_edits_result;
 }
+
 #endif
 
 std::string FileName(CXFile file) {
@@ -146,3 +149,52 @@ std::string ToString(CXString cx_string) {
 std::string ToString(CXCursorKind kind) {
   return ToString(clang_getCursorKindSpelling(kind));
 }
+
+#if USE_CLANG_CXX
+TEST_SUITE("ClangUtils") {
+  TEST_CASE("replacements") {
+    const std::string sample_document =
+        "int \n"
+        "main() { int *i = 0; return 0; \n"
+        "}";
+    const std::vector<clang::tooling::Replacement> clang_replacements = {
+        {"foo.cc", 3, 2, " "},     {"foo.cc", 13, 1, "\n  "},
+        {"foo.cc", 17, 1, ""},     {"foo.cc", 19, 0, " "},
+        {"foo.cc", 25, 1, "\n  "}, {"foo.cc", 35, 2, "\n"}};
+
+    // Expected format:
+    //
+    // int main() {
+    //   int *i = 0;
+    //   return 0;
+    // }
+
+    const auto text_edits = ConvertClangReplacementsIntoTextEdits(
+        sample_document, clang_replacements);
+    REQUIRE(text_edits.size() == 6);
+    REQUIRE(text_edits[0].range.start.line == 0);
+    REQUIRE(text_edits[0].range.start.character == 3);
+    REQUIRE(text_edits[0].newText == " ");
+
+    REQUIRE(text_edits[1].range.start.line == 1);
+    REQUIRE(text_edits[1].range.start.character == 8);
+    REQUIRE(text_edits[1].newText == "\n  ");
+
+    REQUIRE(text_edits[2].range.start.line == 1);
+    REQUIRE(text_edits[2].range.start.character == 12);
+    REQUIRE(text_edits[2].newText == "");
+
+    REQUIRE(text_edits[3].range.start.line == 1);
+    REQUIRE(text_edits[3].range.start.character == 14);
+    REQUIRE(text_edits[3].newText == " ");
+
+    REQUIRE(text_edits[4].range.start.line == 1);
+    REQUIRE(text_edits[4].range.start.character == 20);
+    REQUIRE(text_edits[4].newText == "\n  ");
+
+    REQUIRE(text_edits[5].range.start.line == 1);
+    REQUIRE(text_edits[5].range.start.character == 30);
+    REQUIRE(text_edits[5].newText == "\n");
+  }
+}
+#endif