add tests for tableDescription component

tests/unit/TableDescription.spec.js

@@ -0,0 +1,37 @@
+import { expect } from 'chai'
+import { shallowMount } from '@vue/test-utils'
+import tableDescription from '@/components/TableDescription.vue'
+
+describe('TableDescription.vue', () => {
+  it('Initially the columns are hidden and table name is rendered', () => {
+    const wrapper = shallowMount(tableDescription, {
+      propsData: {
+        name: 'Test table',
+        columns: [
+          { name: 'id', type: 'number' },
+          { name: 'title', type: 'nvarchar(24)' }
+        ]
+      }
+    })
+    expect(wrapper.find('.table-name').text()).to.equal('Test table')
+    expect(wrapper.find('.columns').isVisible()).to.equal(false)
+  })
+
+  it('Columns are visible and correct when click on table name', async () => {
+    const wrapper = shallowMount(tableDescription, {
+      propsData: {
+        name: 'Test table',
+        columns: [
+          { name: 'id', type: 'number' },
+          { name: 'title', type: 'nvarchar(24)' }
+        ]
+      }
+    })
+    await wrapper.find('.table-name').trigger('click')
+
+    expect(wrapper.find('.columns').isVisible()).to.equal(true)
+    expect(wrapper.findAll('.column').length).to.equal(2)
+    expect(wrapper.findAll('.column').at(0).text()).to.include('id').and.include('number')
+    expect(wrapper.findAll('.column').at(1).text()).to.include('title').and.include('nvarchar(24)')
+  })
+})