diff --git a/clang-tools-extra/unittests/clangd/SourceCodeTests.cpp b/clang-tools-extra/unittests/clangd/SourceCodeTests.cpp
index 57276af..4a97fa0 100644
--- a/clang-tools-extra/unittests/clangd/SourceCodeTests.cpp
+++ b/clang-tools-extra/unittests/clangd/SourceCodeTests.cpp
@@ -37,6 +37,13 @@
   return Pos;
 }
 
+Range range(const std::pair<int, int> p1, const std::pair<int, int> p2) {
+  Range range;
+  range.start = position(p1.first, p1.second);
+  range.end = position(p2.first, p2.second);
+  return range;
+}
+
 TEST(SourceCodeTests, PositionToOffset) {
   // line out of bounds
   EXPECT_THAT_EXPECTED(positionToOffset(File, position(-1, 2)), Failed());
@@ -119,6 +126,14 @@
   EXPECT_THAT(offsetToPosition(File, 30), Pos(2, 9)) << "out of bounds";
 }
 
+TEST(SourceCodeTests, IsRangeConsecutive) {
+  EXPECT_TRUE(IsRangeConsecutive(range({2, 2}, {2, 3}), range({2, 3}, {2, 4})));
+  EXPECT_FALSE(
+      IsRangeConsecutive(range({0, 2}, {0, 3}), range({2, 3}, {2, 4})));
+  EXPECT_FALSE(
+      IsRangeConsecutive(range({2, 2}, {2, 3}), range({2, 4}, {2, 5})));
+}
+
 } // namespace
 } // namespace clangd
 } // namespace clang