tsl-devkit/lsp-server/test/request_json/didOpen.json

{
    "jsonrpc": "2.0",
    "method": "textDocument/didOpen",
    "params": {
        "textDocument": {
            "uri": "{{MAIN_UNIT_URI}}",
            "languageId": "tsl",
            "version": 1,
            "text": {{MAIN_UNIT_TEXT}}
        }
    }
}