adding monkeytype

packages/util/__test__/arrays.spec.ts

@@ -0,0 +1,49 @@
+import { describe, it, expect } from "vitest";
+import * as Arrays from "../src/arrays";
+
+describe("arrays", () => {
+  it("intersect", () => {
+    const testCases = [
+      {
+        a: [1],
+        b: [2],
+        removeDuplicates: false,
+        expected: [],
+      },
+      {
+        a: [1],
+        b: [1],
+        removeDuplicates: false,
+        expected: [1],
+      },
+      {
+        a: [1, 1],
+        b: [1],
+        removeDuplicates: true,
+        expected: [1],
+      },
+      {
+        a: [1, 1],
+        b: [1],
+        removeDuplicates: false,
+        expected: [1, 1],
+      },
+      {
+        a: [1],
+        b: [1, 2, 3],
+        removeDuplicates: false,
+        expected: [1],
+      },
+      {
+        a: [1, 1],
+        b: [1, 2, 3],
+        removeDuplicates: true,
+        expected: [1],
+      },
+    ];
+
+    testCases.forEach(({ a, b, removeDuplicates, expected }) => {
+      expect(Arrays.intersect(a, b, removeDuplicates)).toEqual(expected);
+    });
+  });
+});