Update

test/weakMap.test.ts

@@ -0,0 +1,43 @@
+import { describe, it } from "mocha";
+import { expect } from "chai";
+
+import { WeakValueMap } from "../src/weakMap";
+
+declare const gc: () => void;
+
+describe("WeakValueMap", () => {
+  interface Value {
+    value: number;
+  }
+
+  it("covers base use cases", () => {
+    const map = new WeakValueMap<string, Value>();
+    const object = { value: 1 };
+    map.set("key", object);
+    expect(map.get("key")!.value).to.equal(1);
+    expect(map.delete("key")).to.be.true;
+    expect(!map.delete("key")).to.be.true;
+  });
+
+  it("overrides previous value", () => {
+    const map = new WeakValueMap<string, Value>();
+    map.set("key", { value: 2 });
+    map.set("key", { value: 3 });
+    expect(map.get("key")!.value).to.equal(3);
+  });
+
+  it("deletes garbage collected values", (done) => {
+    const map = new WeakValueMap<string, Value>();
+    map.set("key", { value: 1 });
+    setTimeout(() => {
+      gc();
+      expect(map.has("key")).to.be.false;
+      map.set("key", { value: 2 });
+
+      setTimeout(() => {
+        gc();
+        done();
+      });
+    });
+  });
+});