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

{
    "jsonrpc": "2.0",
    "method": "textDocument/didOpen",
    "params": {
        "textDocument": {
            "uri": "file:///home/cobia/test_lsp/1.tsl",
            "languageId": "tsl",
            "version": 1,
            "text": "function aaa();\nbegin\nend;"
        }
    }
}