1 files changed, 67 insertions, 0 deletions
diff --git a/spec/frontend/design_management/components/design_scaler_spec.js b/spec/frontend/design_management/components/design_scaler_spec.js
new file mode 100644
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+++ b/spec/frontend/design_management/components/design_scaler_spec.js
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+import { shallowMount } from '@vue/test-utils';
+import DesignScaler from '~/design_management/components/design_scaler.vue';
+
+describe('Design management design scaler component', () => {
+  let wrapper;
+
+  function createComponent(propsData, data = {}) {
+    wrapper = shallowMount(DesignScaler, {
+      propsData,
+    });
+    wrapper.setData(data);
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  const getButton = type => {
+    const buttonTypeOrder = ['minus', 'reset', 'plus'];
+    const buttons = wrapper.findAll('button');
+    return buttons.at(buttonTypeOrder.indexOf(type));
+  };
+
+  it('emits @scale event when "plus" button clicked', () => {
+    createComponent();
+
+    getButton('plus').trigger('click');
+    expect(wrapper.emitted('scale')).toEqual([[1.2]]);
+  });
+
+  it('emits @scale event when "reset" button clicked (scale > 1)', () => {
+    createComponent({}, { scale: 1.6 });
+    return wrapper.vm.$nextTick().then(() => {
+      getButton('reset').trigger('click');
+      expect(wrapper.emitted('scale')).toEqual([[1]]);
+    });
+  });
+
+  it('emits @scale event when "minus" button clicked (scale > 1)', () => {
+    createComponent({}, { scale: 1.6 });
+
+    return wrapper.vm.$nextTick().then(() => {
+      getButton('minus').trigger('click');
+      expect(wrapper.emitted('scale')).toEqual([[1.4]]);
+    });
+  });
+
+  it('minus and reset buttons are disabled when scale === 1', () => {
+    createComponent();
+
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('minus and reset buttons are enabled when scale > 1', () => {
+    createComponent({}, { scale: 1.2 });
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  it('plus button is disabled when scale === 2', () => {
+    createComponent({}, { scale: 2 });
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+});