neotest-rust

Neotest adapter for Rust, using cargo-nextest.

Requires nvim-treesitter and the parser for Rust.

require("neotest").setup({
  adapters = {
    require("neotest-rust")
  }
})

If you wish to give additional arguments to the cargo nextest, you can specify the args when initializing the adapter.

require("neotest").setup({
  adapters = {
    require("neotest-rust") {
        args = { "--no-capture" },
    }
  }
})

Supports standard library tests, rstest, Tokio's [#tokio::test], and more. Does not support rstest's parametrized tests.

Debugging Tests

Codelldb is the default adapter used for debugging. Alternatives can be specified via the dap_adapter property during initialization.

require("neotest").setup({
  adapters = {
    require("neotest-rust") {
        args = { "--no-capture" },
        dap_adapter = "lldb",
    }
  }
})

See nvim-dap, and rust-tools#debugging if you are using rust-tools.nvim, for more information.

The following limitations apply to both running and debugging tests.

Assumes unit tests in main.rs, mod.rs, and lib.rs are in a tests module.
Does not support rstest's #[case] macro.
When running tests for a main.rs in an integration test subdirectory (e.g. tests/testsuite/main.rs), all tests in that subdirectory will be run (e.g. all tests in tests/testsuite/). This is because Cargo lacks the capability to specify a test file.

Additionally, when debugging tests, no output from failed tests will be captured in the results provided to Neotest.