Require TypeScript 4.7

.c8rc.json

@@ -1,7 +1,7 @@
 {
 	"all": true,
 	"exclude": [
-		"{coverage,examples,media,test,test-d,test-tap,types}/**",
+		"{coverage,examples,media,test,test-types,test-tap,types}/**",
 		"*.config.cjs",
 		"*.d.*(c|m)ts"
 	],

.github/workflows/ci.yml

@@ -42,7 +42,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ts-version: [~4.4, ~4.5, ~4.6, ~4.7]
+        ts-version: [~4.7]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
@@ -55,9 +55,8 @@ jobs:
       - run: npm i typescript@${TS_VERSION}
         env:
           TS_VERSION: ${{ matrix.ts-version }}
-      - run: npm ls typescript
-        continue-on-error: true
-      - run: npx tsd
+      - run: ./node_modules/typescript/bin/tsc --version
+      - run: ./node_modules/typescript/bin/tsc --noEmit
 
   lockfile_churn:
     name: Test package-lock for unexpected modifications

.xo-config.cjs

@@ -49,6 +49,15 @@ module.exports = {
 				'unicorn/no-empty-file': 'off',
 			},
 		},
+		{
+			files: 'test-types/**',
+			rules: {
+				'ava/assertion-arguments': 'off',
+				'ava/no-ignored-test-files': 'off',
+				'ava/no-skip-assert': 'off',
+				'ava/use-t': 'off',
+			},
+		},
 		{
 			// TODO: Update tests.
 			files: 'test/**',

ava.config.js

@@ -1,6 +1,6 @@
 export default { // eslint-disable-line import/no-anonymous-default-export
 	files: ['test/**', '!test/**/{fixtures,helpers}/**'],
-	ignoredByWatcher: ['{coverage,docs,media,test-d,test-tap}/**'],
+	ignoredByWatcher: ['{coverage,docs,media,test-types,test-tap}/**'],
 	environmentVariables: {
 		AVA_FAKE_SCM_ROOT: '.fake-root', // This is an internal test flag.
 	},

docs/recipes/typescript.md

@@ -4,7 +4,7 @@ Translations: [Español](https://github.com/avajs/ava-docs/blob/main/es_ES/docs/
 
 AVA comes bundled with a TypeScript definition file. This allows developers to leverage TypeScript for writing tests.
 
-This guide assumes you've already set up TypeScript for your project. Note that AVA's definition expects at least version 4.4.
+This guide assumes you've already set up TypeScript for your project. Note that AVA's definition expects at least version 4.7.
 
 ## Enabling AVA's support for TypeScript test files
 

entrypoints/main.d.cts

@@ -0,0 +1,2 @@
+export {default} from './main.js';
+export * from './main.js';

entrypoints/main.d.ts

@@ -0,0 +1,12 @@
+import type {TestFn} from '../types/test-fn.js';
+
+export * from '../types/assertions.js';
+export * from '../types/try-fn.js';
+export * from '../types/test-fn.js';
+export * from '../types/subscribable.js';
+
+/** Call to declare a test, or chain to declare hooks or test modifiers */
+declare const test: TestFn;
+
+/** Call to declare a test, or chain to declare hooks or test modifiers */
+export default test;

entrypoints/plugin.d.cts

@@ -1 +1 @@
-export * from '../plugin.js'
+export * from './plugin.js'

package.json

@@ -11,18 +11,18 @@
 	"exports": {
 		".": {
 			"import": {
-				"types": "./index.d.ts",
+				"types": "./entrypoints/main.d.ts",
 				"default": "./entrypoints/main.mjs"
 			},
 			"require": {
-				"types": "./entrypoints/index.d.cts",
+				"types": "./entrypoints/main.d.cts",
 				"default": "./entrypoints/main.cjs"
 			}
 		},
 		"./eslint-plugin-helper": "./entrypoints/eslint-plugin-helper.cjs",
 		"./plugin": {
 			"import": {
-				"types": "./plugin.d.ts",
+				"types": "./entrypoints/plugin.d.ts",
 				"default": "./entrypoints/plugin.mjs"
 			},
 			"require": {
@@ -37,14 +37,12 @@
 	},
 	"scripts": {
 		"cover": "c8 --report=none test-ava && c8 --report=none --no-clean tap && c8 report",
-		"test": "xo && tsd && npm run -s cover"
+		"test": "xo && tsc --noEmit && npm run -s cover"
 	},
 	"files": [
 		"entrypoints",
 		"lib",
-		"types",
-		"index.d.ts",
-		"plugin.d.ts"
+		"types"
 	],
 	"keywords": [
 		"🦄",
@@ -131,6 +129,7 @@
 	"devDependencies": {
 		"@ava/test": "github:avajs/test",
 		"@ava/typescript": "^3.0.1",
+		"@sindresorhus/tsconfig": "^3.0.1",
 		"@sinonjs/fake-timers": "^9.1.2",
 		"ansi-escapes": "^5.0.0",
 		"c8": "^7.11.3",
@@ -145,7 +144,7 @@
 		"tempy": "^2.0.0",
 		"touch": "^3.1.0",
 		"tsd": "^0.20.0",
-		"typescript": "^4.7.2",
+		"typescript": "^4.7.3",
 		"xo": "^0.49.0",
 		"zen-observable": "^0.8.15"
 	},

test-tap/fixture/snapshots/test-sourcemaps/src/feature/__tests__/test.ts

@@ -1,4 +1,3 @@
-/* eslint-disable @typescript-eslint/no-unsafe-call */
 import test from '../../../../../../../entrypoints/main.cjs';
 
 test('feature test title', t => {

test-tap/fixture/snapshots/test-sourcemaps/src/test.ts

@@ -1,4 +1,3 @@
-/* eslint-disable @typescript-eslint/no-unsafe-call */
 import test from '../../../../../entrypoints/main.cjs';
 
 test('top level test title', t => {

test-tap/fixture/snapshots/test-sourcemaps/src/test/test.ts

@@ -1,4 +1,3 @@
-/* eslint-disable @typescript-eslint/no-unsafe-call */
 import test from '../../../../../../entrypoints/main.cjs';
 
 test('test title', t => {

test-types/import-in-cts/assertions-as-type-guards.cts

@@ -0,0 +1,40 @@
+import test from 'ava';
+import {expectType} from 'tsd';
+
+type Expected = {foo: 'bar'};
+const expected: Expected = {foo: 'bar'};
+
+test('deepEqual', t => {
+	const actual: unknown = {};
+	if (t.deepEqual(actual, expected)) {
+		expectType<Expected>(actual);
+	}
+});
+
+test('like', t => {
+	const actual: unknown = {};
+	if (t.like(actual, expected)) {
+		expectType<Expected>(actual);
+	}
+});
+
+test('is', t => {
+	const actual: unknown = 2;
+	if (t.is(actual, 3 as const)) {
+		expectType<3>(actual);
+	}
+});
+
+test('false', t => {
+	const actual: unknown = true;
+	if (t.false(actual)) {
+		expectType<false>(actual);
+	}
+});
+
+test('true', t => {
+	const actual: unknown = false;
+	if (t.true(actual)) {
+		expectType<true>(actual);
+	}
+});

test-types/import-in-cts/context.cts

@@ -0,0 +1,33 @@
+/* eslint-disable @typescript-eslint/no-empty-function */
+import anyTest, {ExecutionContext, TestFn} from 'ava';
+import {expectError, expectType} from 'tsd';
+
+interface Context {
+	foo: string;
+}
+
+const test = anyTest as TestFn<Context>;
+
+const macro = test.macro((t, _expected: number) => {
+	expectType<string>(t.context.foo);
+});
+
+test.beforeEach(t => {
+	expectType<Context>(t.context);
+});
+
+// @ts-expect-error TS2769
+expectError(test('foo is bar', macro, 'bar')); // eslint-disable-line @typescript-eslint/no-confusing-void-expression
+
+anyTest('default context is unknown', t => {
+	expectType<unknown>(t.context);
+});
+
+// See https://github.com/avajs/ava/issues/2253
+interface Covariant extends Context {
+	bar: number;
+}
+
+const test2 = anyTest as TestFn<Covariant>;
+const hook = (_t: ExecutionContext<Context>) => {};
+test2.beforeEach(hook);

test-types/import-in-cts/deep-equal.cts

@@ -0,0 +1,29 @@
+import test from 'ava';
+import {expectType} from 'tsd';
+
+test('actual extends expected', t => {
+	type Expected = {foo: [1, 2, 3]};
+	const expected: Expected = {foo: [1, 2, 3]};
+	const actual = {foo: [1, 2, 3]};
+	if (t.deepEqual(actual, expected)) {
+		expectType<Expected>(actual);
+	}
+});
+
+test('expected extends actual', t => {
+	type Expected = {foo: Array<number | string>};
+	type Actual = {foo: number[]};
+	const expected: Expected = {foo: [1, 2, 3]};
+	const actual: Actual = {foo: [1, 2, 3]};
+	if (t.deepEqual(actual, expected)) {
+		expectType<Actual>(expected);
+	}
+});
+
+test('neither extends the each other', t => {
+	type Expected = {readonly foo: readonly [1, 2, 3]};
+	type Actual = {foo: number[]};
+	const expected: Expected = {foo: [1, 2, 3]};
+	const actual: Actual = {foo: [1, 2, 3]};
+	t.deepEqual(actual, expected);
+});

test-types/import-in-cts/implementation-result.cts

@@ -0,0 +1,20 @@
+/* eslint-disable @typescript-eslint/no-empty-function */
+import test from 'ava';
+
+test.after('return anything else', _t => ({
+	foo: 'bar',
+	subscribe() {},
+	then() {}, // eslint-disable-line unicorn/no-thenable
+}));
+
+test('return a promise-like', _t => ({
+	then(resolve) { // eslint-disable-line unicorn/no-thenable
+		resolve?.(); // eslint-disable-line @typescript-eslint/no-floating-promises
+	},
+}));
+
+test('return a subscribable', _t => ({
+	subscribe({complete}) {
+		complete();
+	},
+}));

test-types/import-in-cts/like.cts

@@ -0,0 +1,25 @@
+import test from 'ava';
+
+test('like', t => {
+	t.like({
+		map: new Map([['foo', 'bar']]),
+		nested: {
+			baz: 'thud',
+			qux: 'quux',
+		},
+	}, {
+		map: new Map([['foo', 'bar']]),
+		nested: {
+			baz: 'thud',
+		},
+	});
+
+	type Foo = {
+		foo?: 'foo';
+		bar?: 'bar';
+	};
+
+	const foo: Foo = {bar: 'bar'};
+	const {foo: _, ...expected} = foo;
+	t.like(expected, {bar: 'bar'});
+});