clang-tools-extra/clangd/test/modules.test

# A smoke test to check the modules can work basically.
#
# Windows have different escaping modes.
# FIXME: We should add one for windows.
# UNSUPPORTED: system-windows
#
# RUN: rm -fr %t
# RUN: mkdir -p %t
# RUN: split-file %s %t
#
# RUN: sed -e "s|DIR|%/t|g" %t/compile_commands.json.tmpl > %t/compile_commands.json.tmp
# RUN: sed -e "s|CLANG_CC|%clang|g" %t/compile_commands.json.tmp > %t/compile_commands.json
# RUN: sed -e "s|DIR|%/t|g" %t/definition.jsonrpc.tmpl > %t/definition.jsonrpc
#
# RUN: clangd -experimental-modules-support -lit-test < %t/definition.jsonrpc \
# RUN:      | FileCheck -strict-whitespace %t/definition.jsonrpc

#--- A.cppm
export module A;
export void printA() {}

#--- Use.cpp
import A;
void foo() {
    print
}

#--- compile_commands.json.tmpl
[
    {
      "directory": "DIR",
      "command": "CLANG_CC -fprebuilt-module-path=DIR -std=c++20 -o DIR/main.cpp.o -c DIR/Use.cpp",
      "file": "DIR/Use.cpp"
    },
    {
      "directory": "DIR",
      "command": "CLANG_CC -std=c++20 DIR/A.cppm --precompile -o DIR/A.pcm",
      "file": "DIR/A.cppm"
    }
]

#--- definition.jsonrpc.tmpl
{
  "jsonrpc": "2.0",
  "id": 0,
  "method": "initialize",
  "params": {
    "processId": 123,
    "rootPath": "clangd",
    "capabilities": {
      "textDocument": {
        "completion": {
          "completionItem": {
            "snippetSupport": true
          }
        }
      }
    },
    "trace": "off"
  }
}
---
{
  "jsonrpc": "2.0",
  "method": "textDocument/didOpen",
  "params": {
    "textDocument": {
      "uri": "file://DIR/Use.cpp",
      "languageId": "cpp",
      "version": 1,
      "text": "import A;\nvoid foo() {\n    print\n}\n"
    }
  }
}

# CHECK: "message"{{.*}}printA{{.*}}(fix available)

---
{"jsonrpc":"2.0","id":1,"method":"textDocument/completion","params":{"textDocument":{"uri":"file://DIR/Use.cpp"},"context":{"triggerKind":1},"position":{"line":2,"character":6}}}
---
{"jsonrpc":"2.0","id":2,"method":"shutdown"}
---
{"jsonrpc":"2.0","method":"exit"}