utest.nvim @ 13e8b100b160e29a3f8cf2a89970d8a6f9e84dc8

local golang = {}

golang.ft = "go"

golang.query = [[

; func TestXxx(t *testing.T)

((function_declaration

  name: (identifier) @test.name)

  (#match? @test.name "^Test")

  (#not-match? @test.name "^TestMain$")) @test.definition

; t.Run("subtest name", func(t *testing.T) {...})

(call_expression

  function: (selector_expression

    operand: (identifier) @_operand

    (#match? @_operand "^(t|s|suite)$")

    field: (field_identifier) @_method)

  (#match? @_method "^Run$")

  arguments: (argument_list . (interpreted_string_literal) @test.name)) @test.definition

; ============================================================================

; Table-driven tests with named slice variable and keyed fields

; Detects table tests with struct fields using keys (e.g., {name: "test1"}).

; Pattern:

;   tt := []struct{ name string }{

;     {name: "test1"},  // @test.name = "test1"

;     {name: "test2"},  // @test.name = "test2"

;   }

;   for _, tc := range tt {

;     t.Run(tc.name, func(t *testing.T) { ... })

;   }

(block

  (statement_list

    (short_var_declaration

      left: (expression_list (identifier) @test.cases)

      right: (expression_list

        (composite_literal

          (literal_value

            (literal_element

              (literal_value

                (keyed_element

                  (literal_element (identifier) @test.field.name)

                  (literal_element (interpreted_string_literal) @test.name)))) @test.definition))))

    (for_statement

      (range_clause

        left: (expression_list (identifier) @test.case)

        right: (identifier) @test.cases1

        (#eq? @test.cases @test.cases1))

      body: (block

        (statement_list

          (expression_statement

            (call_expression

              function: (selector_expression

                operand: (identifier) @test.operand

                (#match? @test.operand "^[t]$")

                field: (field_identifier) @test.method

                (#match? @test.method "^Run$"))

              arguments: (argument_list

                (selector_expression

                  operand: (identifier) @test.case1

                  (#eq? @test.case @test.case1)

                  field: (field_identifier) @test.field.name1

                  (#eq? @test.field.name @test.field.name1))))))))))

; ============================================================================

; Map-based table-driven tests

; Detects table tests where test cases are defined in a map with string keys.

; Pattern:

;   testCases := map[string]struct{ want int }{

;     "test1": {want: 1},  // @test.name = "test1"

;     "test2": {want: 2},  // @test.name = "test2"

;   }

;   for name, tc := range testCases {

;     t.Run(name, func(t *testing.T) { ... })

;   }

(block

  (statement_list

    (short_var_declaration

      left: (expression_list (identifier) @test.cases)

      right: (expression_list

        (composite_literal

          (literal_value

            (keyed_element

              (literal_element (interpreted_string_literal) @test.name)

              (literal_element (literal_value) @test.definition))))))

    (for_statement

      (range_clause

        left: (expression_list

          (identifier) @test.key.name

          (identifier) @test.case)

        right: (identifier) @test.cases1

        (#eq? @test.cases @test.cases1))

      body: (block

        (statement_list

          (expression_statement

            (call_expression

              function: (selector_expression

                operand: (identifier) @test.operand

                (#match? @test.operand "^[t]$")

                field: (field_identifier) @test.method

                (#match? @test.method "^Run$"))

              arguments: (argument_list

                ((identifier) @test.key.name1

                  (#eq? @test.key.name @test.key.name1))))))))))

]]

---@param name string

---@return boolean

function golang.is_subtest(name)

  return not name:match "^Test"

end

---@param file string

---@return string

function golang.get_cwd(file)

  return vim.fn.fnamemodify(file, ":h")

end

---@param file string

---@return string[]

function golang.test_file_command(file)

  local pkg_dir = golang.get_cwd(file)

  return { "go", "test", "-vet=off", "-json", "-v", "-count=1", pkg_dir }

end

---@param test table Test info with name, parent, is_subtest fields

---@param file string File path

---@return string[] Command arguments

function golang.test_command(test, file)

  local pkg_dir = golang.get_cwd(file)

  local run_pattern = ""

  if test.is_subtest and test.parent then

    run_pattern = "^"

      .. vim.fn.escape(test.parent, "[](){}.*+?^$\\")

      .. "/"

      .. vim.fn.escape(test.name:gsub(" ", "_"), "[](){}.*+?^$\\")

      .. "$"

  else

    run_pattern = "^" .. vim.fn.escape(test.name, "[](){}.*+?^$\\") .. "$"

  end

  return { "go", "test", "-vet=off", "-json", "-v", "-count=1", "-run", run_pattern, pkg_dir }

end

function golang.parse_output(output, file)

  local results = {}

  local file_basename = vim.fn.fnamemodify(file, ":t")

  local test_outputs = {} ---@type table<string, string[]>

  local test_status = {} ---@type table<string, utest.TestStatus>

  for _, line in ipairs(output) do

    if line == "" then goto continue end

    local ok, event = pcall(vim.json.decode, line)

    if not ok or not event then goto continue end

    local test_name = event.Test

    if not test_name then goto continue end

    if event.Action == "run" then

      test_outputs[test_name] = test_outputs[test_name] or {}

    elseif event.Action == "output" then

      test_outputs[test_name] = test_outputs[test_name] or {}

      if event.Output then

        local output_line = (event.Output:gsub("\n$", ""))

        table.insert(test_outputs[test_name], output_line)

      end

    elseif event.Action == "pass" then

      test_status[test_name] = "success"

    elseif event.Action == "skip" then

      test_status[test_name] = "skipped"

    elseif event.Action == "fail" then

      test_status[test_name] = "fail"

    end

    ::continue::

  end

  -- build results

  for name, status in pairs(test_status) do

    local output_lines = test_outputs[name] or {}

    local error_line = nil

    if status == "fail" then

      for _, out_line in ipairs(output_lines) do

        local line_num = out_line:match(file_basename .. ":(%d+):")

        if line_num then

          error_line = tonumber(line_num)

          break

        end

      end

    end

    table.insert(results, {

      name = name,

      status = status,

      output = output_lines,

      error_line = error_line,

    })

  end

  return results

end

---@param output string[] output lines, json format

---@param test_name string|nil specific test name to get output for

---@return string[]

function golang.extract_test_output(output, test_name)

  local result = {}

  for _, line in ipairs(output) do

    local ok, event = pcall(vim.json.decode, line)

    if ok and event and event.Action == "output" and event.Output then

      local trimmed = vim.trim(event.Output)

      if trimmed ~= "" then

        if test_name then

          if (event.Test or "") == test_name then table.insert(result, trimmed) end

        else

          table.insert(result, trimmed)

        end

      end

    end

  end

  return result

end

---@param output string[]

---@return string|nil

function golang.extract_error_message(output)

  for _, line in ipairs(output) do

    if line:match "%.go:%d+:" then return vim.trim(line) end

  end

  return nil

end

return golang