Add non-erroring version of bclas'subClassThisTypeAssignable01.ts'

Author: DanielRosenwasser

tests/cases/compiler/subclassThisTypeAssignable02.ts

@@ -0,0 +1,37 @@
+// @allowJs: true
+// @checkJs: true
+// @strict: true
+// @outDir: ./out
+
+// @filename: tile1.ts
+interface Lifecycle<Attrs, State extends Lifecycle<Attrs, State>> {
+	oninit?(vnode: Vnode<Attrs, State>): number;
+	[_: number]: any;
+}
+
+interface Vnode<Attrs, State extends Lifecycle<Attrs, State>> {
+	tag: Component<Attrs, State>;
+}
+
+interface Component<Attrs, State extends Lifecycle<Attrs, State>> {
+	view(this: State, vnode: Vnode<Attrs, State>): number;
+}
+
+interface ClassComponent<A> extends Lifecycle<A, ClassComponent<A>> {
+	oninit?(vnode: Vnode<A, this>): number;
+	view(vnode: Vnode<A, this>): number;
+}
+
+interface MyAttrs { id: number }
+class C implements ClassComponent<MyAttrs> {
+	view(v: Vnode<MyAttrs, C>) { return 0; }
+
+	// Must declare a compatible-ish index signature or else
+	// we won't correctly implement ClassComponent.
+	[_: number]: unknown;
+}
+
+const test8: ClassComponent<any> = new C();
+// @filename: file1.js
+/** @type {ClassComponent<any>} */
+const test9 = new C();