debt: add things to main entry point that people need

src/index.ts

@@ -6,12 +6,16 @@ import * as messages from '@cucumber/messages'
 export { default as Cli } from './cli'
 export { parseGherkinMessageStream } from './cli/helpers'
 export { default as PickleFilter } from './pickle_filter'
-export { default as Runtime } from './runtime'
+export {
+  default as Runtime,
+  INewRuntimeOptions,
+  IRuntimeOptions,
+} from './runtime'
 export { default as supportCodeLibraryBuilder } from './support_code_library_builder'
 export { default as DataTable } from './models/data_table'
 
 // Formatters
-export { default as Formatter } from './formatter'
+export { default as Formatter, IFormatterOptions } from './formatter'
 export { default as FormatterBuilder } from './formatter/builder'
 export { default as JsonFormatter } from './formatter/json_formatter'
 export { default as ProgressFormatter } from './formatter/progress_formatter'
@@ -43,4 +47,8 @@ export {
   IWorld,
   IWorldOptions,
 } from './support_code_library_builder/world'
+export {
+  ITestCaseHookParameter,
+  ITestStepHookParameter,
+} from './support_code_library_builder/types'
 export const Status = messages.TestStepResultStatus

src/support_code_library_builder/types.ts

@@ -25,12 +25,12 @@ export interface ITestStepHookParameter {
 
 export type TestCaseHookFunction<WorldType> = (
   this: WorldType,
-  arg?: ITestCaseHookParameter
+  arg: ITestCaseHookParameter
 ) => any | Promise<any>
 
 export type TestStepHookFunction<WorldType> = (
   this: WorldType,
-  arg?: ITestStepHookParameter
+  arg: ITestStepHookParameter
 ) => void
 
 export type TestStepFunction<WorldType> = (

test-d/hooks.ts

@@ -1,9 +1,32 @@
-import { After, Before } from '../'
+import {
+  After,
+  AfterAll,
+  AfterStep,
+  Before,
+  BeforeAll,
+  BeforeStep,
+  ITestCaseHookParameter,
+  ITestStepHookParameter,
+} from '../'
 
+// should allow argument-less hooks
+BeforeAll(function () {})
+AfterAll(function () {})
+Before(function () {})
+After(function () {})
+BeforeStep(function () {})
+AfterStep(function () {})
+
+// should allow typed arguments in hooks
+Before(function (param: ITestCaseHookParameter) {})
+After(function (param: ITestCaseHookParameter) {})
+BeforeStep(function (param: ITestStepHookParameter) {})
+AfterStep(function (param: ITestStepHookParameter) {})
+
+// should allow us to return 'skipped' from a test case hook
 Before(async function () {
   return 'skipped'
 })
-
 After(async function () {
   return 'skipped'
 })