Migrate type tests to TSTyche

.prettierignore

@@ -1,5 +1,8 @@
 dist
 pages/generated
 pages/out
-type-definitions/ts-tests/
-type-definitions/flow-tests/
+type-definitions/ts-tests/*.ts
+type-definitions/flow-tests/
+
+!type-definitions/ts-tests/covariance.ts
+!type-definitions/ts-tests/deepCopy.ts

package.json

@@ -55,7 +55,9 @@
     "npm": ">=7.0.0"
   },
   "scripts": {
-    "test": "run-s format lint type-check build unit-test",
+    "test": "run-s format lint type-check build test:*",
+    "test:unit": "jest",
+    "test:types": "tstyche",
     "format": "npm run lint:format -- --write",
     "lint": "run-s lint:*",
     "lint:format": "prettier --check \"{__tests__,src,type-definitions,website/src,perf,resources}/**/*{.js,.ts,.tsx,.flow,.css}\"",
@@ -69,7 +71,6 @@
     "build:types": "cpy ./type-definitions/immutable.* dist",
     "build:prepare": "./resources/prepare-dist.sh",
     "build:stats": "node ./resources/dist-stats.mjs",
-    "unit-test": "jest",
     "website:build": "cd website && next build && next-sitemap",
     "website:dev": "cd website && next dev",
     "check-git-clean": "./resources/check-git-clean.sh",
@@ -127,6 +128,7 @@
     "rollup": "3.28.1",
     "size-limit": "^8.2.6",
     "transducers-js": "0.4.174",
+    "tstyche": "^1.0.0",
     "typescript": "5.1"
   },
   "size-limit": [

tstyche.config.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "https://tstyche.org/schemas/config.json",
+  "target": ["4.5", "5.0", "current"],
+  "testFileMatch": [
+    "**/type-definitions/ts-tests/covariance.ts",
+    "**/type-definitions/ts-tests/deepCopy.ts"
+  ]
+}

type-definitions/ts-tests/covariance.ts

@@ -1,4 +1,13 @@
-import { List, Map, OrderedMap, OrderedSet, Set, Stack } from 'immutable';
+import { expect, test } from 'tstyche';
+import {
+  List,
+  Map,
+  MapOf,
+  OrderedMap,
+  OrderedSet,
+  Set,
+  Stack,
+} from 'immutable';
 
 class A {
   x: number;
@@ -7,6 +16,7 @@ class A {
     this.x = 1;
   }
 }
+
 class B extends A {
   y: string;
 
@@ -15,6 +25,7 @@ class B extends A {
     this.y = 'B';
   }
 }
+
 class C {
   z: string;
 
@@ -23,55 +34,52 @@ class C {
   }
 }
 
-// List covariance
-let listOfB: List<B> = List<B>();
-let listOfA: List<A> = listOfB;
-
-// $ExpectType List<B>
-listOfA = List([new B()]);
-
-// $ExpectError
-let listOfC: List<C> = listOfB;
-
-// Map covariance
-declare let mapOfB: Map<string, B>;
-let mapOfA: Map<string, A> = mapOfB;
-
-// $ExpectType MapOf<{ b: B; }>
-mapOfA = Map({ b: new B() });
-
-// $ExpectError
-let mapOfC: Map<string, C> = mapOfB;
-
-// Set covariance
-declare let setOfB: Set<B>;
-let setOfA: Set<A> = setOfB;
-
-// $ExpectType Set<B>
-setOfA = Set([new B()]);
-// $ExpectError
-let setOfC: Set<C> = setOfB;
-
-// Stack covariance
-declare let stackOfB: Stack<B>;
-let stackOfA: Stack<A> = stackOfB;
-// $ExpectType Stack<B>
-stackOfA = Stack([new B()]);
-// $ExpectError
-let stackOfC: Stack<C> = stackOfB;
-
-// OrderedMap covariance
-declare let orderedMapOfB: OrderedMap<string, B>;
-let orderedMapOfA: OrderedMap<string, A> = orderedMapOfB;
-// $ExpectType OrderedMap<string, B>
-orderedMapOfA = OrderedMap({ b: new B() });
-// $ExpectError
-let orderedMapOfC: OrderedMap<string, C> = orderedMapOfB;
-
-// OrderedSet covariance
-declare let orderedSetOfB: OrderedSet<B>;
-let orderedSetOfA: OrderedSet<A> = orderedSetOfB;
-// $ExpectType OrderedSet<B>
-orderedSetOfA = OrderedSet([new B()]);
-// $ExpectError
-let orderedSetOfC: OrderedSet<C> = orderedSetOfB;
+test('List covariance', () => {
+  expect<List<A>>().type.toBeAssignable(List<B>());
+
+  expect(List([new B()])).type.toEqual<List<B>>();
+
+  expect<List<C>>().type.not.toBeAssignable(List<B>());
+});
+
+test('Map covariance', () => {
+  expect<Map<string, A>>().type.toBeAssignable<Map<string, B>>();
+
+  expect(Map({ b: new B() })).type.toEqual<MapOf<{ b: B }>>();
+
+  expect<Map<string, C>>().type.not.toBeAssignable<Map<string, B>>();
+});
+
+test('Set covariance', () => {
+  expect<Set<A>>().type.toBeAssignable<Set<B>>();
+
+  expect(Set([new B()])).type.toEqual<Set<B>>();
+
+  expect<Set<C>>().type.not.toBeAssignable<Set<B>>();
+});
+
+test('Stack covariance', () => {
+  expect<Stack<A>>().type.toBeAssignable<Stack<B>>();
+
+  expect(Stack([new B()])).type.toEqual<Stack<B>>();
+
+  expect<Stack<C>>().type.not.toBeAssignable<Stack<B>>();
+});
+
+test('OrderedMap covariance', () => {
+  expect<OrderedMap<string, A>>().type.toBeAssignable<OrderedMap<string, B>>();
+
+  expect(OrderedMap({ b: new B() })).type.toEqual<OrderedMap<string, B>>();
+
+  expect<OrderedMap<string, C>>().type.not.toBeAssignable<
+    OrderedMap<string, B>
+  >();
+});
+
+test('OrderedSet covariance', () => {
+  expect<OrderedSet<A>>().type.toBeAssignable<OrderedSet<B>>();
+
+  expect(OrderedSet([new B()])).type.toEqual<OrderedSet<B>>();
+
+  expect<OrderedSet<C>>().type.not.toBeAssignable<OrderedSet<B>>();
+});