support: add ability to name hooks

CHANGELOG.md

@@ -8,6 +8,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 Please see [CONTRIBUTING.md](https://github.com/cucumber/cucumber/blob/master/CONTRIBUTING.md) on how to contribute to Cucumber.
 
 ## [Unreleased]
+### Added
+- Add support for named hooks (see [documentation](./docs/support_files/hooks.md#named-hooks)) ([#1994](https://github.com/cucumber/cucumber-js/pull/1994))
+
 ### Changed
 - Rename the `cucumber-js` binary's underlying file to be `cucumber.js`, so it doesn't fall foul of Node.js module conventions and plays nicely with ESM loaders (see [documentation](./docs/esm.md#transpiling)) ([#1993](https://github.com/cucumber/cucumber-js/pull/1993))
 

compatibility/features/hooks/hooks.ts

@@ -6,6 +6,10 @@ Before(function () {
   // no-op
 })
 
+Before({ name: 'A named hook' }, function () {
+  // no-op
+})
+
 When('a step passes', function () {
   // no-op
 })

docs/support_files/hooks.md

@@ -6,7 +6,7 @@ Note that your hook functions cannot reference the [world](./world.md) as `this`
 arrow functions. See [FAQ](../faq.md) for details.
 
 ```javascript
-var {After, Before} = require('@cucumber/cucumber');
+const {After, Before} = require('@cucumber/cucumber');
 
 // Synchronous
 Before(function () {
@@ -33,12 +33,28 @@ After(function () {
 });
 ```
 
+## Named hooks
+
+ℹ️ Added in v8.1.0
+
+Hooks can optionally be named:
+
+```javascript
+const {Before} = require('@cucumber/cucumber');
+
+Before({name: "Set up some test state"}, function () {
+// do stuff here
+});
+```
+
+Such hooks will then be referenced by name in [formatter](../formatters.md) output, which can be useful to help you understand what's happening with your tests.
+
 ## Tagged hooks
 
 Hooks can be conditionally selected for execution based on the tags of the scenario.
 
 ```javascript
-var {After, Before} = require('@cucumber/cucumber');
+const {After, Before} = require('@cucumber/cucumber');
 
 Before(function () {
   // This hook will be executed before all scenarios
@@ -85,7 +101,7 @@ If you have some setup / teardown that needs to be done before or after all scen
 Unlike `Before` / `After` these methods will not have a world instance as `this`. This is because each scenario gets its own world instance and these hooks run before / after **all** scenarios.
 
 ```javascript
-var {AfterAll, BeforeAll} = require('@cucumber/cucumber');
+const {AfterAll, BeforeAll} = require('@cucumber/cucumber');
 
 // Synchronous
 BeforeAll(function () {
@@ -111,7 +127,7 @@ AfterAll(function () {
 If you have some code execution that needs to be done before or after all steps, use `BeforeStep` / `AfterStep`. Like the `Before` / `After` hooks, these also have a world instance as 'this', and can be conditionally selected for execution based on the tags of the scenario.
 
 ```javascript
-var {AfterStep, BeforeStep} = require('@cucumber/cucumber');
+const {AfterStep, BeforeStep} = require('@cucumber/cucumber');
 
 BeforeStep({tags: "@foo"}, function () {
   // This hook will be executed before all steps in a scenario with tag @foo

features/named_hooks.feature

@@ -0,0 +1,35 @@
+Feature: Named hooks
+
+  As a developer
+  I want to name a `Before` or `After` hook
+  So that I can easily identify which hooks are run when reporting
+
+  Scenario: Hook is named and then referenced by its name in formatter output
+    Given a file named "features/a.feature" with:
+      """
+      Feature: some feature
+        Scenario: some scenario
+          Given a step
+      """
+    And a file named "features/step_definitions/hooks.js" with:
+      """
+      const {After, Before} = require('@cucumber/cucumber')
+
+      Before({name: 'hook 1'}, function() {})
+      Before({name: 'hook 2'}, function() {})
+      After({name: 'hook 3'}, function() {})
+      """
+    And a file named "features/step_definitions/steps.js" with:
+      """
+      const {Given} = require('@cucumber/cucumber')
+
+      Given('a step', function() {
+        throw 'nope'
+      })
+      """
+    When I run cucumber-js
+    Then it fails
+    And the output contains the text:
+    """
+    Before (hook 2) #
+    """

package.json

@@ -200,7 +200,7 @@
     "@cucumber/gherkin": "23.0.1",
     "@cucumber/gherkin-streams": "5.0.1",
     "@cucumber/gherkin-utils": "^7.0.0",
-    "@cucumber/html-formatter": "19.0.0",
+    "@cucumber/html-formatter": "19.1.0",
     "@cucumber/messages": "18.0.0",
     "@cucumber/tag-expressions": "4.1.0",
     "assertion-error-formatter": "^3.0.0",
@@ -230,7 +230,7 @@
     "yup": "^0.32.11"
   },
   "devDependencies": {
-    "@cucumber/compatibility-kit": "9.1.2",
+    "@cucumber/compatibility-kit": "9.2.0",
     "@cucumber/message-streams": "4.0.1",
     "@cucumber/query": "11.0.0",
     "@microsoft/api-documenter": "7.17.0",

src/cli/helpers.ts

@@ -195,6 +195,7 @@ function emitTestCaseHooks(
       const envelope: messages.Envelope = {
         hook: {
           id: testCaseHookDefinition.id,
+          name: testCaseHookDefinition.name,
           tagExpression: testCaseHookDefinition.tagExpression,
           sourceReference: {
             uri: testCaseHookDefinition.uri,

src/cli/helpers_spec.ts

@@ -220,6 +220,7 @@ describe('helpers', () => {
             id: '0',
             line: 3,
             options: {
+              name: 'before hook',
               tags: '@hooks-tho',
             },
             uri: 'features/support/hooks.js',
@@ -231,7 +232,9 @@ describe('helpers', () => {
             unwrappedCode: noopFunction,
             id: '1',
             line: 7,
-            options: {},
+            options: {
+              name: 'after hook',
+            },
             uri: 'features/support/hooks.js',
           }),
           new TestCaseHookDefinition({
@@ -249,6 +252,7 @@ describe('helpers', () => {
         {
           hook: {
             id: '0',
+            name: 'before hook',
             tagExpression: '@hooks-tho',
             sourceReference: {
               uri: 'features/support/hooks.js',
@@ -261,6 +265,7 @@ describe('helpers', () => {
         {
           hook: {
             id: '1',
+            name: 'after hook',
             tagExpression: undefined,
             sourceReference: {
               uri: 'features/support/hooks.js',
@@ -273,6 +278,7 @@ describe('helpers', () => {
         {
           hook: {
             id: '2',
+            name: undefined,
             tagExpression: undefined,
             sourceReference: {
               uri: 'features/support/hooks.js',

src/formatter/helpers/test_case_attempt_formatter.ts

@@ -49,13 +49,17 @@ function formatStep({
   printAttachments,
 }: IFormatStepRequest): string {
   const {
+    name,
     result: { status },
     actionLocation,
     attachments,
   } = testStep
   const colorFn = colorFns.forStatus(status)
   const identifier = testStep.keyword + valueOrDefault(testStep.text, '')
   let text = colorFn(`${CHARACTERS.get(status)} ${identifier}`)
+  if (doesHaveValue(name)) {
+    text += colorFn(` (${name})`)
+  }
   if (doesHaveValue(actionLocation)) {
     text += ` # ${colorFns.location(formatLocation(actionLocation))}`
   }

src/formatter/helpers/test_case_attempt_parser.ts

@@ -18,6 +18,7 @@ export interface IParsedTestStep {
   argument?: messages.PickleStepArgument
   attachments: messages.Attachment[]
   keyword: string
+  name?: string
   result: messages.TestStepResult
   snippet?: string
   sourceLocation?: ILineAndUri
@@ -87,6 +88,7 @@ function parseStep({
       uri: hookDefinition.uri,
       line: hookDefinition.line,
     }
+    out.name = hookDefinition.name
   }
   if (
     doesHaveValue(testStep.stepDefinitionIds) &&

src/models/definition.ts

@@ -20,6 +20,7 @@ export interface IDefinitionOptions {
 }
 
 export interface IHookDefinitionOptions extends IDefinitionOptions {
+  name?: string
   tags?: string
 }
 

src/models/test_case_hook_definition.ts

@@ -12,11 +12,13 @@ export default class TestCaseHookDefinition
   extends Definition
   implements IDefinition
 {
+  public readonly name: string
   public readonly tagExpression: string
   private readonly pickleTagFilter: PickleTagFilter
 
   constructor(data: IDefinitionParameters<IHookDefinitionOptions>) {
     super(data)
+    this.name = data.options.name
     this.tagExpression = data.options.tags
     this.pickleTagFilter = new PickleTagFilter(data.options.tags)
   }

src/support_code_library_builder/types.ts

@@ -48,6 +48,7 @@ export interface IDefineStepOptions {
 }
 
 export interface IDefineTestCaseHookOptions {
+  name?: string
   tags?: string
   timeout?: number
 }

test-d/hooks.ts

@@ -23,6 +23,10 @@ After(function (param: ITestCaseHookParameter) {})
 BeforeStep(function (param: ITestStepHookParameter) {})
 AfterStep(function (param: ITestStepHookParameter) {})
 
+// should allow an object with tags and/or name in hooks
+Before({ tags: '@foo', name: 'before hook' }, function () {})
+After({ tags: '@foo', name: 'after hook' }, function () {})
+
 // should allow us to return 'skipped' from a test case hook
 Before(async function () {
   return 'skipped'