add tests and fix test running command

Author: VitaliiBedletskyi

package.json

@@ -105,7 +105,7 @@
     },
     "scripts": {
         "lint": "eslint . --max-warnings=0",
-		"test:unit": "node --experimental-test-module-mocks --test ./test/**/*.spec.js",
+		"test:unit": "node --experimental-test-module-mocks --test-reporter dot --test ./test",
         "package": "node esbuild.package.js",
 		"postinstall": "npx simple-git-hooks"
     },

test/forward_engineering/helpers/generateIdToNameMap.spec.js

@@ -0,0 +1,81 @@
+const { describe, it } = require('node:test');
+const { deepStrictEqual } = require('node:assert');
+const { generateIdToNameMap } = require('../../../forward_engineering/helpers/generateIdToNameMap');
+
+describe('generateIdToNameMap', () => {
+	it('should return an empty map for an empty or undefined schema', () => {
+		const result = generateIdToNameMap({});
+		deepStrictEqual(result, {});
+	});
+
+	it('should return an empty map for an undefined schema', () => {
+		const result = generateIdToNameMap();
+		deepStrictEqual(result, {});
+	});
+
+	it('should map GUIDs to names for a simple schema', () => {
+		const schema = {
+			Entity1: { GUID: '123' },
+			Entity2: { GUID: '456' },
+		};
+		const expected = {
+			'123': 'Entity1',
+			'456': 'Entity2',
+		};
+		const result = generateIdToNameMap(schema);
+		deepStrictEqual(result, expected);
+	});
+
+	it('should ignore system names', () => {
+		const schema = {
+			Scalars: { GUID: '123', properties: {} },
+			Entity1: { GUID: '456', properties: {} },
+		};
+		const expected = {
+			'456': 'Entity1',
+		};
+		const result = generateIdToNameMap(schema);
+		deepStrictEqual(result, expected);
+	});
+
+	it('should handle nested properties', () => {
+		const schema = {
+			Entity1: {
+				GUID: '123',
+				properties: {
+					SubEntity1: {
+						GUID: '456',
+					},
+				},
+			},
+		};
+		const expected = {
+			'123': 'Entity1',
+			'456': 'SubEntity1',
+		};
+		const result = generateIdToNameMap(schema);
+		deepStrictEqual(result, expected);
+	});
+
+	it('should handle complex nested properties inside system name', () => {
+		const schema = {
+			Scalars: {
+				GUID: '123',
+				properties: {
+					SubEntity1: {
+						GUID: '456',
+						properties: {
+							SubSubEntity1: { GUID: '789', properties: {} },
+						},
+					},
+				},
+			},
+		};
+		const expected = {
+			'456': 'SubEntity1',
+			'789': 'SubSubEntity1',
+		};
+		const result = generateIdToNameMap(schema);
+		deepStrictEqual(result, expected);
+	});
+});