test: add unit tests for setReadonlyConstantToGlobalThis

tests/object.test.ts

@@ -0,0 +1,32 @@
+import { setReadonlyConstantToGlobalThis } from '../src/object';
+
+describe('setReadonlyConstantToGlobalThis', () => {
+	const constantValue = 'testValue';
+	it('should define a readonly constant on globalThis', () => {
+		const constantName = Math.random().toString(36).substring(2, 15);
+		setReadonlyConstantToGlobalThis(constantName, constantValue);
+		expect((globalThis as any)[constantName]).toBe(constantValue);
+		expect(() => ((globalThis as any)[constantName] = 'newValue')).toThrow(TypeError);
+		expect((globalThis as any)[constantName]).toBe(constantValue);
+	});
+
+	it('should not be configurable', () => {
+		const constantName = Math.random().toString(36).substring(2, 15);
+		setReadonlyConstantToGlobalThis(constantName, constantValue);
+		const deleteResult = delete (globalThis as any)[constantName];
+		expect(deleteResult).toBe(false);
+		expect((globalThis as any)[constantName]).toBe(constantValue);
+	});
+
+	it('should allow passing additional attributes', () => {
+		const constantName = Math.random().toString(36).substring(2, 15);
+		setReadonlyConstantToGlobalThis(constantName, constantValue, { enumerable: true });
+		expect(Object.getOwnPropertyDescriptor(globalThis, constantName)?.enumerable).toBe(true);
+	});
+
+	it('should not be writable', () => {
+		const constantName = Math.random().toString(36).substring(2, 15);
+		setReadonlyConstantToGlobalThis(constantName, constantValue);
+		expect(Object.getOwnPropertyDescriptor(globalThis, constantName)?.writable).toBe(false);
+	});
+});