TestErrorHandler_PicksRightOne() — fiber Function Reference

Architecture documentation for the TestErrorHandler_PicksRightOne() function in app_test.go from the fiber codebase.

Function go FiberCore Context

Entity Profile

FiberCore→ Context→ TestErrorHandler_PicksRightOne() — fiber Function Reference

Dependency Diagram

graph TD
  6757bd88_2e31_2a55_02cb_3f8ce02cc80f["TestErrorHandler_PicksRightOne()"]
  e728fdd2_242f_706b_c1d2_041b3d6badb5["app_test.go"]
  6757bd88_2e31_2a55_02cb_3f8ce02cc80f -->|defined in| e728fdd2_242f_706b_c1d2_041b3d6badb5
  style 6757bd88_2e31_2a55_02cb_3f8ce02cc80f fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

app_test.go lines 2941–3010

func TestErrorHandler_PicksRightOne(t *testing.T) {
	t.Parallel()
	// common handler to be used by all routes,
	// it will always fail by returning an error since
	// we need to test that the right ErrorHandler is invoked
	handler := func(_ Ctx) error {
		return errors.New("random error")
	}

	// subapp /api/v1/users [no custom error handler]
	appAPIV1Users := New()
	appAPIV1Users.Get("/", handler)

	// subapp /api/v1/use [with custom error handler]
	appAPIV1UseEH := func(c Ctx, _ error) error {
		return c.SendString("/api/v1/use error handler")
	}
	appAPIV1Use := New(Config{ErrorHandler: appAPIV1UseEH})
	appAPIV1Use.Get("/", handler)

	// subapp: /api/v1 [with custom error handler]
	appV1EH := func(c Ctx, _ error) error {
		return c.SendString("/api/v1 error handler")
	}
	appV1 := New(Config{ErrorHandler: appV1EH})
	appV1.Get("/", handler)
	appV1.Use("/users", appAPIV1Users)
	appV1.Use("/use", appAPIV1Use)

	// root app [no custom error handler]
	app := New()
	app.Get("/", handler)
	app.Use("/api/v1", appV1)

	testCases := []struct {
		path     string // the endpoint url to test
		expected string // the expected error response
	}{
		// /api/v1/users mount doesn't have custom ErrorHandler
		// so it should use the upper-nearest one (/api/v1)
		{"/api/v1/users", "/api/v1 error handler"},

		// /api/v1/use mount has a custom ErrorHandler
		{"/api/v1/use", "/api/v1/use error handler"},

		// /api/v1 mount has a custom ErrorHandler
		{"/api/v1", "/api/v1 error handler"},

		// / mount doesn't have custom ErrorHandler, since is
		// the root path i will use Fiber's default Error Handler
		{"/", "random error"},
	}

	for _, testCase := range testCases {
		t.Run(testCase.path, func(t *testing.T) {
			t.Parallel()
			resp, err := app.Test(httptest.NewRequest(MethodGet, testCase.path, http.NoBody))
			if err != nil {
				t.Fatal(err)
			}

			body, err := io.ReadAll(resp.Body)
			if err != nil {
				t.Fatal(err)
			}

			require.Equal(t, testCase.expected, string(body))
		})
	}
}