chore: add tests

unional · Sep 12, 2022 · a51362a · a51362a
1 parent a688567
commit a51362a
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/ts/PrimitiveTypes.spec.ts b/ts/PrimitiveTypes.spec.ts
@@ -0,0 +1,10 @@
+import { IsNever, isType } from './index.js'
+
+describe('IsNever<T>', () => {
+  it('checks if type is never', () => {
+    isType.equal<true, true, IsNever<never>>()
+    isType.equal<true, false, IsNever<number>>()
+    isType.equal<true, false, IsNever<{ a: number }>>()
+    isType.equal<true, false, IsNever<[]>>()
+  })
+})