First commit

test/ValueChangeDetector_spect.ts

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+import "mocha";
+import { expect } from "chai";
+import { ValueChangeDetector } from "../lib/ValueChangeDetector";
+
+describe("ValueChangeDetector", () => {
+    let instance: ValueChangeDetector;
+
+    beforeEach(() => {
+        instance = new ValueChangeDetector();
+    });
+
+    describe("isUpdated", () => {
+        it("should return true for the first time", () => {
+            const result = instance.isUpdated({ key: 1, value: 1 });
+            expect(result).to.equal(true);
+        });
+
+        it("should return false when specifying the same data", () => {
+            const data = { key: "key", value: "value" };
+            instance.update(data);
+            const result = instance.isUpdated({ ...data });
+            expect(result).to.equal(false);
+        });
+
+        it("should return true for different key", () => {
+            instance.update({ key: "key", value: "value" });
+            const result = instance.isUpdated({ key: "key2", value: "value" });
+            expect(result).to.equal(true);
+        });
+
+        it("should convert number to string for key", () => {
+            instance.update({ key: 1, value: "value" });
+            const result = instance.isUpdated({ key: "1", value: "value" });
+            expect(result).to.equal(false);
+        });
+
+        it("should convert object to string for key", () => {
+            instance.update({ key: { obj: 1 }, value: "value" });
+            const result = instance.isUpdated({ key: { obj: 1 }, value: "value" });
+            expect(result).to.equal(false);
+        });
+    });
+});