initialize with first MVP

tests/test_samurai_js_spec.lua

@@ -0,0 +1,53 @@
+local jest = require("test-samurai.runners.js-jest")
+
+describe("test-samurai js runner (jest)", function()
+  it("detects JS/TS test files by name and filetype", function()
+    local bufnr1 = vim.api.nvim_create_buf(false, true)
+    vim.api.nvim_buf_set_name(bufnr1, "/tmp/foo.test.ts")
+    vim.bo[bufnr1].filetype = "typescript"
+    assert.is_true(jest.is_test_file(bufnr1))
+
+    local bufnr2 = vim.api.nvim_create_buf(false, true)
+    vim.api.nvim_buf_set_name(bufnr2, "/tmp/foo.ts")
+    vim.bo[bufnr2].filetype = "typescript"
+    assert.is_false(jest.is_test_file(bufnr2))
+  end)
+
+  it("finds nearest it() call as test name", function()
+    local bufnr = vim.api.nvim_create_buf(false, true)
+    vim.api.nvim_buf_set_name(bufnr, "/tmp/foo.test.ts")
+    vim.bo[bufnr].filetype = "typescript"
+    local lines = {
+      "describe(\"outer\", function() {",
+      "  it(\"inner 1\", function() {",
+      "    -- inside 1",
+      "  })",
+      "",
+      "  it(\"inner 2\", function() {",
+      "    -- inside 2",
+      "  })",
+      "})",
+    }
+    vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, lines)
+
+    local orig_fs_find = vim.fs.find
+    vim.fs.find = function(markers, opts)
+      return { "/tmp/package.json" }
+    end
+
+    local row_inside_second = 6
+    local spec, err = jest.find_nearest(bufnr, row_inside_second, 0)
+
+    vim.fs.find = orig_fs_find
+
+    assert.is_nil(err)
+    assert.is_not_nil(spec)
+    assert.equals("inner 2", spec.test_name)
+    assert.equals("jest", spec.framework)
+    assert.equals("/tmp/foo.test.ts", spec.file)
+    assert.equals("/tmp", spec.cwd)
+
+    local cmd_spec = jest.build_command(spec)
+    assert.are.same({ "npx", "jest", "/tmp/foo.test.ts", "-t", "inner 2" }, cmd_spec.cmd)
+  end)
+end)