add tests for ArgumentConverter class

Author: patinthehat

tests/ArgumentConverter.test.ts

@@ -0,0 +1,35 @@
+/* eslint-disable no-undef */
+import { ArgumentConverter } from '@/ArgumentConverter';
+
+// Tests that convertToPrimitive method returns the same string value and isHtml property is false when string argument is passed.
+it('converts to primitive with a string argument', () => {
+    const str = 'test string';
+    const result = ArgumentConverter.convertToPrimitive(str);
+    expect(result.value).toBe(str);
+    expect(result.isHtml).toBe(false);
+});
+
+// Tests that convertToPrimitive method returns the same number value and isHtml property is false when number argument is passed.
+it('converts to primitive with a number argument', () => {
+    const num = 123;
+    const result = ArgumentConverter.convertToPrimitive(num);
+    expect(result.value).toBe(num);
+    expect(result.isHtml).toBe(false);
+});
+
+// Tests that convertToPrimitive method returns the same boolean value and isHtml property is false when boolean argument is passed.
+it('convert to primitive with a boolean argument', () => {
+    const bool = true;
+    const result = ArgumentConverter.convertToPrimitive(bool);
+    expect(result.value).toBe(bool);
+    expect(result.isHtml).toBe(false);
+});
+
+// Tests that convertToPrimitive returns null value and isHtml=false when argument is null.
+it('convert to primitive with a null argument', () => {
+    const arg = null;
+    const result = ArgumentConverter.convertToPrimitive(arg);
+
+    expect(result.value).toBeNull();
+    expect(result.isHtml).toBe(false);
+});