Create Knob.spec.js

src/components/knob/Knob.spec.js

@@ -0,0 +1,47 @@
+import { mount } from  '@vue/test-utils';
+import Knob from './Knob.vue';
+
+describe('Knob.vue', () => {
+    let wrapper;
+
+    beforeEach(() => {
+        wrapper = mount(Knob, {
+            props: {
+                modelValue: 20
+            }
+        });
+    });
+
+    it('should exist', () => {
+        expect(wrapper.find('.p-knob.p-component').exists()).toBe(true);
+        expect(wrapper.find('.p-knob-text').text()).toBe('20');
+    });
+
+    it('should change with click event', async () => {
+        const event = { offsetX: 100, offsetY: 100 };
+
+        await wrapper.vm.onClick(event);
+
+        expect(wrapper.emitted()['update:modelValue'][0]).toEqual([95]);
+    });
+
+    it('should min - max work', async () => {
+        await wrapper.setProps({ min: -50, max: 50 });
+
+        const event = { offsetX: 100, offsetY: 100 };
+
+        await wrapper.vm.onClick(event);
+
+        expect(wrapper.emitted()['update:modelValue'][0]).toEqual([45]);
+    });
+
+    it('should step work', async () => {
+        await wrapper.setProps({ step: 10 });
+
+        const event = { offsetX: 18, offsetY: 30 };
+
+        await wrapper.vm.onClick(event);
+
+        expect(wrapper.emitted()['update:modelValue'][0]).toEqual([30]);
+    });
+});