Add tests

Author: RobbieTheWagner

package.json

@@ -28,46 +28,46 @@
     "start-test-server": "http-server -p 9002",
     "test": "pnpm lint:js && pnpm test:ci",
     "test:ci": "pnpm test:unit:ci && pnpm test:cy:ci",
-    "test:cy:ci": "pnpm build && start-server-and-test start-test-server http://localhost:9002 cy:run",
-    "test:cy:watch": "pnpm build && start-server-and-test start-test-server http://localhost:9002 cy:open",
+    "test:cy:ci": "pnpm build && start-server-and-test start-test-server http://127.0.0.1:9002 cy:run",
+    "test:cy:watch": "pnpm build && start-server-and-test start-test-server http://127.0.0.1:9002 cy:open",
     "test:unit:ci": "jest --coverage",
     "test:unit:watch": "jest --watch",
     "watch": "pnpm clean && rollup -c --environment DEVELOPMENT --watch"
   },
   "devDependencies": {
-    "@babel/core": "^7.27.4",
-    "@babel/preset-env": "^7.27.2",
+    "@babel/core": "^7.28.5",
+    "@babel/preset-env": "^7.28.5",
     "@testing-library/jest-dom": "^5.17.0",
-    "autoprefixer": "^10.4.21",
+    "autoprefixer": "^10.4.22",
     "babel-jest": "^29.7.0",
     "babel-plugin-rewire": "^1.2.0",
     "babel-plugin-transform-es2015-modules-commonjs": "^6.26.2",
-    "chai": "^5.2.0",
+    "chai": "^5.3.3",
     "cssnano": "^6.1.2",
     "cypress": "13.17.0",
     "eslint": "^8.57.1",
-    "eslint-plugin-jest": "^28.3.0",
+    "eslint-plugin-jest": "^28.14.0",
     "http-server": "^14.1.1",
     "jest": "^29.7.0",
     "jest-environment-jsdom": "^29.7.0",
     "jest-expect-message": "^1.1.3",
     "jsdom": "^22.1.0",
     "mutationobserver-shim": "^0.3.7",
-    "postcss": "^8.5.5",
+    "postcss": "^8.5.6",
     "release-it": "^15.11.0",
     "release-it-lerna-changelog": "^5.0.0",
-    "rimraf": "^5.0.7",
+    "rimraf": "^5.0.10",
     "rollup": "^2.79.2",
     "rollup-plugin-babel": "^4.4.0",
     "rollup-plugin-browsersync": "^1.3.3",
     "rollup-plugin-eslint": "^7.0.0",
     "rollup-plugin-filesize": "^10.0.0",
     "rollup-plugin-license": "^3.6.0",
-    "rollup-plugin-sass": "^1.15.2",
+    "rollup-plugin-sass": "^1.15.3",
     "rollup-plugin-terser": "^7.0.2",
-    "rollup-plugin-visualizer": "^5.12.0",
-    "sinon": "^15.1.2",
-    "start-server-and-test": "^2.0.12"
+    "rollup-plugin-visualizer": "^5.14.0",
+    "sinon": "^15.2.0",
+    "start-server-and-test": "^2.1.3"
   },
   "publishConfig": {
     "registry": "https://registry.npmjs.org"

pnpm-lock.yaml

@@ -0,0 +1,73 @@
+import shift from '../../src/js/shift';
+
+describe('Shift', () => {
+  describe('position()', () => {
+    it('returns undefined when shift option is not set', () => {
+      const context = {
+        options: {}
+      };
+      const result = shift.position.call(context, { top: 10, left: 20 });
+      expect(result).toBeUndefined();
+    });
+
+    it('shifts position with string value (single value applies to both)', () => {
+      const context = {
+        options: { shift: '10' }
+      };
+      const result = shift.position.call(context, { top: 10, left: 20 });
+      expect(result).toEqual({ top: 20, left: 30 });
+    });
+
+    it('shifts position with string value (two values)', () => {
+      const context = {
+        options: { shift: '10 5' }
+      };
+      const result = shift.position.call(context, { top: 10, left: 20 });
+      expect(result).toEqual({ top: 20, left: 25 });
+    });
+
+    it('shifts position with object value', () => {
+      const context = {
+        options: { shift: { top: 15, left: 25 } }
+      };
+      const result = shift.position.call(context, { top: 10, left: 20 });
+      expect(result).toEqual({ top: 25, left: 45 });
+    });
+
+    it('shifts position with function value', () => {
+      const shiftFn = jest.fn(({ top, left }) => ({ top: 5, left: 10 }));
+      const context = {
+        options: { shift: shiftFn }
+      };
+      const result = shift.position.call(context, { top: 10, left: 20 });
+      expect(shiftFn).toHaveBeenCalledWith({ top: 10, left: 20 });
+      expect(result).toEqual({ top: 15, left: 30 });
+    });
+
+    it('handles function returning string', () => {
+      const shiftFn = jest.fn(() => '20 30');
+      const context = {
+        options: { shift: shiftFn }
+      };
+      const result = shift.position.call(context, { top: 10, left: 20 });
+      expect(result).toEqual({ top: 30, left: 50 });
+    });
+
+    it('handles function returning object', () => {
+      const shiftFn = jest.fn(() => ({ top: 100, left: 200 }));
+      const context = {
+        options: { shift: shiftFn }
+      };
+      const result = shift.position.call(context, { top: 10, left: 20 });
+      expect(result).toEqual({ top: 110, left: 220 });
+    });
+
+    it('handles negative shift values', () => {
+      const context = {
+        options: { shift: '-5 -10' }
+      };
+      const result = shift.position.call(context, { top: 10, left: 20 });
+      expect(result).toEqual({ top: 5, left: 10 });
+    });
+  });
+});