4 files changed, 62 insertions, 0 deletions
diff --git a/clangd/test/Inputs/background-index/compile_commands.json b/clangd/test/Inputs/background-index/compile_commands.json
new file mode 100644
index 00000000..1bb835f6
--- /dev/null
+++ b/clangd/test/Inputs/background-index/compile_commands.json
@@ -0,0 +1,5 @@
+[{
+  "directory": "DIRECTORY",
+  "command": "clang foo.cpp",
+  "file": "DIRECTORY/foo.cpp"
+}]
diff --git a/clangd/test/Inputs/background-index/definition.jsonrpc b/clangd/test/Inputs/background-index/definition.jsonrpc
new file mode 100644
index 00000000..933e7791
--- /dev/null
+++ b/clangd/test/Inputs/background-index/definition.jsonrpc
@@ -0,0 +1,51 @@
+{
+  "jsonrpc": "2.0",
+  "id": 0,
+  "method": "initialize",
+  "params": {
+    "processId": 123,
+    "rootPath": "clangd",
+    "capabilities": {},
+    "trace": "off"
+  }
+}
+---
+{
+  "jsonrpc": "2.0",
+  "method": "textDocument/didOpen",
+  "params": {
+    "textDocument": {
+      "uri": "file://DIRECTORY/bar.cpp",
+      "languageId": "cpp",
+      "version": 1,
+      "text": "#include \"foo.h\"\nint main(){\nreturn foo();\n}"
+    }
+  }
+}
+---
+{
+  "jsonrpc": "2.0",
+  "id": 1,
+  "method": "sync",
+  "params": null
+}
+---
+{
+  "jsonrpc": "2.0",
+  "id": 2,
+  "method": "textDocument/definition",
+  "params": {
+    "textDocument": {
+      "uri": "file://DIRECTORY/bar.cpp"
+    },
+    "position": {
+      "line": 2,
+      "character": 8
+    }
+  }
+}
+# CHECK: "uri": "file://{{.*}}/foo.cpp"
+---
+{"jsonrpc":"2.0","id":3,"method":"shutdown"}
+---
+{"jsonrpc":"2.0","method":"exit"}
diff --git a/clangd/test/Inputs/background-index/foo.cpp b/clangd/test/Inputs/background-index/foo.cpp
new file mode 100644
index 00000000..c42ca4d0
--- /dev/null
+++ b/clangd/test/Inputs/background-index/foo.cpp
@@ -0,0 +1,2 @@
+#include "foo.h"
+int foo() { return 42; }
diff --git a/clangd/test/Inputs/background-index/foo.h b/clangd/test/Inputs/background-index/foo.h
new file mode 100644
index 00000000..9539f1d7
--- /dev/null
+++ b/clangd/test/Inputs/background-index/foo.h
@@ -0,0 +1,4 @@
+#ifndef FOO_H
+#define FOO_H
+int foo();
+#endif