chore: remove tsd

TSD has weird regressions with vue-next 3.0.9, maybe due to TS 4.2.
Instead of figthing it, let's adopt what the other Vue project did and replace TSD with a plain `tsc` check.

See vuejs/core@97dedeb for example for a similar commit on vue-next

package.json

@@ -35,7 +35,6 @@
     "rollup": "^2.44.0",
     "rollup-plugin-typescript2": "^0.30.0",
     "ts-jest": "25.3.1",
-    "tsd": "0.14.0",
     "typescript": "^4.2.3",
     "vitepress": "^0.12.2",
     "vue": "3.0.7",
@@ -54,7 +53,7 @@
   "scripts": {
     "test": "yarn jest --runInBand tests",
     "test:build": "yarn jest --runInBand tests -use-build",
-    "tsd": "tsd",
+    "tsd": "tsc -p test-dts/tsconfig.tsd.json",
     "build": "yarn rollup -c rollup.config.js",
     "lint": "prettier -c --parser typescript \"(src|tests)/**/*.ts?(x)\"",
     "lint:fix": "yarn lint --write",

test-dts/getComponent.d-test.ts

@@ -1,4 +1,4 @@
-import { expectType } from 'tsd'
+import { expectType } from './index'
 import { defineComponent, ComponentPublicInstance } from 'vue'
 import { mount } from '../src'
 

test-dts/index.d.ts

@@ -0,0 +1,17 @@
+// This directory contains a number of d.ts assertions using tsd:
+// https://github.com/SamVerschueren/tsd
+// The tests checks type errors and will probably show up red in VSCode, and
+// it's intended. We cannot use directives like @ts-ignore or @ts-nocheck since
+// that would suppress the errors that should be caught.
+
+export function describe(_name: string, _fn: () => void): void
+
+export function expectType<T>(value: T): void
+export function expectError<T>(value: T): void
+export function expectAssignable<T, T2 extends T = T>(value: T2): void
+
+export type IsUnion<T, U extends T = T> = (T extends any
+  ? (U extends T ? false : true)
+  : never) extends false
+  ? false
+  : true

test-dts/mount.d-test.ts

@@ -1,9 +1,8 @@
-import { expectError, expectType } from 'tsd'
+import { expectError, expectType } from './index'
 import {
   DefineComponent,
   defineComponent,
-  FunctionalComponent,
-  reactive
+  FunctionalComponent
 } from 'vue'
 import { Options, Vue } from 'vue-class-component'
 import { mount } from '../src'
@@ -49,8 +48,8 @@ mount(AppWithDefine, {
   props: { a: 'Hello', c: 2 }
 })
 
-// wrong prop type should not compile
 expectError(
+  // @ts-expect-error wrong prop type should not compile
   mount(AppWithDefine, {
     props: { a: 2 }
   })
@@ -77,9 +76,9 @@ mount(AppWithProps, {
   props: { a: 'Hello', b: 2 }
 })
 
-// wrong prop type should not compile
 expectError(
   mount(AppWithProps, {
+    // @ts-expect-error wrong prop type should not compile
     props: { a: 2 }
   })
 )
@@ -127,7 +126,7 @@ mount(AppWithoutProps, {
 
 // Functional tests
 
-// wrong props
+// @ts-expect-error wrong props
 expectError((props: { a: 1 }) => {}, {
   props: {
     a: '222'
@@ -208,6 +207,7 @@ class ClassComponent extends Vue {
   }
 }
 
+// @ts-expect-error changeMessage expects an argument
 expectError(mount(ClassComponent, {}).vm.changeMessage())
 mount(ClassComponent, {}).vm.changeMessage('')
 
@@ -234,6 +234,7 @@ mount(Foo, {
 
 expectError(
   mount(
+    // @ts-expect-error
     defineComponent({
       props: {
         baz: String,

test-dts/plugins.d-test.ts

@@ -1,4 +1,4 @@
-import { expectError, expectType } from 'tsd'
+import { expectError } from './index'
 import { ComponentPublicInstance } from 'vue'
 import { config, VueWrapper } from '../src'
 
@@ -40,7 +40,11 @@ config.plugins.VueWrapper.install(PluginWithOptionalOptions2, { msg: 'hello' })
 
 // uncertain if it is possible to forbid this usage
 // expectError(config.plugins.VueWrapper.install(PluginWithoutOptions, {}))
+// @ts-expect-error option has the wrong type
 expectError(config.plugins.VueWrapper.install(PluginWithOptions, { msg: true }))
+// @ts-expect-error option is mandatory
 expectError(config.plugins.VueWrapper.install(PluginWithOptions, {}))
+// @ts-expect-error option is mandatory
 expectError(config.plugins.VueWrapper.install(PluginWithOptionalOptions, {}))
+// @ts-expect-error option is mandatory
 expectError(config.plugins.VueWrapper.install(PluginWithOptionalOptions2, {}))

test-dts/shallowMount.d-test.ts

@@ -1,4 +1,4 @@
-import { expectError, expectType } from 'tsd'
+import { expectError, expectType } from './index'
 import { defineComponent } from 'vue'
 import { Options, Vue } from 'vue-class-component'
 import { shallowMount } from '../src'
@@ -26,8 +26,8 @@ shallowMount(AppWithDefine, {
   props: { a: 'Hello', c: 2 }
 })
 
-// wrong prop type should not compile
 expectError(
+  // @ts-expect-error wrong prop type should not compile
   shallowMount(AppWithDefine, {
     props: { a: 2 }
   })
@@ -56,9 +56,9 @@ shallowMount(AppWithProps, {
   props: { a: 'Hello', b: 2 }
 })
 
-// wrong prop type should not compile
 expectError(
   shallowMount(AppWithProps, {
+    // @ts-expect-error wrong prop type should not compile
     props: { a: 2 }
   })
 )
@@ -107,5 +107,6 @@ class ClassComponent extends Vue {
   }
 }
 
+// @ts-expect-error changeMessage expects an argument
 expectError(shallowMount(ClassComponent, {}).vm.changeMessage())
 shallowMount(ClassComponent, {}).vm.changeMessage('')

test-dts/tsconfig.tsd.json

@@ -0,0 +1,16 @@
+{
+  "extends": "../tsconfig.json",
+  "compilerOptions": {
+    "noEmit": false,
+    "skipLibCheck": true,
+    "experimentalDecorators": true,
+    "strictNullChecks": false
+  },
+  "exclude": [
+    "../src",
+  ],
+  "include": [
+    "../dist",
+    "../test-dts"
+  ]
+}

test-dts/wrapper.d-test.ts

@@ -1,4 +1,4 @@
-import { expectType } from 'tsd'
+import { expectType } from './index'
 import { defineComponent } from 'vue'
 import { mount } from '../src'