Add tests

tests/cases/compiler/contextualIntersectionTypes.ts

@@ -0,0 +1,46 @@
+// @strict: true
+// @noemit: true
+
+// https://github.com/microsoft/TypeScript/issues/59473
+
+const a: [any] & [1] = [1];
+const b: { ml: any } & { ml: 'edge' } = { ml: 'edge' };
+
+// https://github.com/microsoft/TypeScript/issues/48812
+
+type Action<TEvent extends { type: string }> = (ev: TEvent) => void;
+
+interface MachineConfig<TEvent extends { type: string }> {
+  schema: {
+    events: TEvent;
+  };
+  on?: {
+    [K in TEvent["type"]]?: Action<TEvent extends { type: K } ? TEvent : never>;
+  } & {
+    "*"?: Action<TEvent>;
+  };
+}
+
+declare function createMachine<TEvent extends { type: string }>(
+  config: MachineConfig<TEvent>
+): void;
+
+createMachine({
+  schema: {
+    events: {} as { type: "FOO" } | { type: "BAR" },
+  },
+  on: {
+    FOO: (ev) => {
+      ev.type;
+    },
+  },
+});
+
+// https://github.com/microsoft/TypeScript/issues/49307#issuecomment-1196014488
+
+type Validate<T> = T & { [K in keyof T]: object }
+declare function f<S, T extends Record<string, (state: S) => any>>(s: S, x: Validate<T>): void;
+
+f(0, {
+  foo: s => s + 1,
+})