add tests for Schema component

tests/unit/Schema.spec.js

@@ -0,0 +1,174 @@
+import { expect } from 'chai'
+import sinon from 'sinon'
+import { mount, createLocalVue } from '@vue/test-utils'
+import Vuex from 'vuex'
+import Schema from '@/components/Schema.vue'
+import TableDescription from '@/components/TableDescription.vue'
+import fu from '@/fileUtils.js'
+
+const localVue = createLocalVue()
+localVue.use(Vuex)
+
+describe('Schema.vue', () => {
+  it('Renders DB name on initial', () => {
+    // mock store state
+    const state = {
+      dbName: 'fooDB'
+    }
+    const store = new Vuex.Store({ state })
+
+    // mout the component
+    const wrapper = mount(Schema, { store, localVue})
+
+    // check DB name and schema visibility
+    expect(wrapper.find('.db-name').text()).to.equal('fooDB')
+    expect(wrapper.find('.schema').isVisible()).to.equal(true)
+  })
+
+  it('Schema visibility is toggled when click on DB name', async () => {
+    // mock store state
+    const state = {
+      dbName: 'fooDB'
+    }
+    const store = new Vuex.Store({ state })
+
+    // mout the component
+    const wrapper = mount(Schema, { store, localVue})
+
+    // click and check visibility
+    await wrapper.find('.db-name').trigger('click')
+    expect(wrapper.find('.schema').isVisible()).to.equal(false)
+    await wrapper.find('.db-name').trigger('click')
+    expect(wrapper.find('.schema').isVisible()).to.equal(true)
+  })
+
+  it('Schema filter', async () => {
+    // mock store state
+    const state = {
+      dbName: 'fooDB',
+      schema: [
+        {
+          name: 'foo',
+          columns: [
+            { name: 'id', type: 'INTEGER' },
+            { name: 'title', type: 'NVARCHAR(24)' }
+          ]
+        },
+        {
+          name: 'bar',
+          columns: [
+            { name: 'id', type: 'INTEGER' },
+            { name: 'price', type: 'INTEGER' }
+          ]
+        },
+        {
+          name: 'foobar',
+          columns: [
+            { name: 'id', type: 'INTEGER' },
+            { name: 'price', type: 'INTEGER' }
+          ]
+        }
+      ]
+    }
+    const store = new Vuex.Store({ state })
+
+    // mount the component
+    const wrapper = mount(Schema, { store, localVue})
+
+    // apply filters and check the list of tables
+    await wrapper.find('#schema-filter input').setValue('foo')
+    let tables = wrapper.findAllComponents(TableDescription)
+    expect(tables).to.have.lengthOf(2)
+    expect(tables.at(0).vm.name).to.equal('foo')
+    expect(tables.at(1).vm.name).to.equal('foobar')
+    
+    await wrapper.find('#schema-filter input').setValue('bar')
+    tables = wrapper.findAllComponents(TableDescription)
+    expect(tables).to.have.lengthOf(2)
+    expect(tables.at(0).vm.name).to.equal('bar')
+    expect(tables.at(1).vm.name).to.equal('foobar')
+
+    await wrapper.find('#schema-filter input').setValue('')
+    tables = wrapper.findAllComponents(TableDescription)
+    expect(tables).to.have.lengthOf(3)
+    expect(tables.at(0).vm.name).to.equal('foo')
+    expect(tables.at(1).vm.name).to.equal('bar')
+    expect(tables.at(2).vm.name).to.equal('foobar')
+  })
+
+  it('Change DB', async () => {
+    // mock store state and mutations
+    const mutations = {
+      saveSchema: sinon.stub()
+    }
+
+    const state = {
+      dbName: 'fooDB',
+      schema: [
+        {
+          name: 'foo',
+          columns: [
+            { name: 'foo_id', type: 'INTEGER' },
+            { name: 'foo_title', type: 'NVARCHAR(24)' }
+          ]
+        },
+        {
+          name: 'foo_prices',
+          columns: [
+            { name: 'foo_id', type: 'INTEGER' },
+            { name: 'foo_price', type: 'INTEGER' }
+          ]
+        }
+      ]
+    }
+
+    const store = new Vuex.Store({ state, mutations })
+
+    // stub getFileFromUser
+    const file = { file: 'hello'}
+    sinon.stub(fu, 'getFileFromUser').resolves(file)
+
+    // mock $db.loadDb()
+    const newSchema = { 
+      dbName: 'barDB', 
+      schema: [
+        {
+          name: 'bar',
+          columns: [
+            { name: 'bar_id', type: 'INTEGER' },
+            { name: 'bar_title', type: 'NVARCHAR(24)' }
+          ]
+        },
+        {
+          name: 'bar_prices',
+          columns: [
+            { name: 'bar_id', type: 'INTEGER' },
+            { name: 'bar_price', type: 'INTEGER' }
+          ]
+        }
+      ]
+    }
+    const $db = {
+      loadDb (file) {
+        return Promise.resolve(newSchema)
+      }
+    }
+
+    // spy on $db.loadDb()
+    sinon.spy($db, 'loadDb')
+
+    // mount the component
+    const wrapper = mount(Schema, { store, localVue, mocks: {$db}})
+
+    // trigger the event
+    await wrapper.find('#db-edit').trigger('click')
+
+    expect(fu.getFileFromUser.calledOnceWith('.db,.sqlite,.sqlite3')).to.equal(true)
+    
+    await fu.getFileFromUser.returnValues[0]
+    expect($db.loadDb.calledOnceWith(file)).to.equal(true)
+    
+    await $db.loadDb.returnValues[0]
+    expect(mutations.saveSchema.calledOnceWith(state, newSchema)).to.equal(true)
+  })
+})