🧪 add test for pending count dropping below zero

src/__tests__/Squawk.pending.test.ts

@@ -0,0 +1,30 @@
+import createStore from "../Squawk";
+
+describe("Squawk pending", () => {
+  it("throws error when pending count drops below zero", () => {
+    const store = createStore({
+      testProp: "initial"
+    });
+
+    // Calling pending with false when count is 0 should throw
+    expect(() => {
+      store.pending("testProp", false);
+    }).toThrowError('Too many calls to pending("testProp", false)');
+  });
+
+  it("handles happy path of pending correctly", () => {
+    const store = createStore({
+      testProp: "initial"
+    });
+
+    // Initially setting to true should not throw
+    expect(() => {
+      store.pending("testProp", true);
+    }).not.toThrow();
+
+    // Setting back to false should also not throw (count returns to 0)
+    expect(() => {
+      store.pending("testProp", false);
+    }).not.toThrow();
+  });
+});