Add tests for pop date range vue component

js/components/__tests__/pop_date_range.test.js

@@ -0,0 +1,99 @@
+import Vue from 'vue'
+import { mount } from '@vue/test-utils'
+
+import PopDateRange from '../pop_date_range'
+
+import { makeTestWrapper } from '../../test_utils/component_test_helpers'
+
+const PopDateRangeWrapper = makeTestWrapper({
+  components: { PopDateRange },
+  templatePath: 'pop_date_range.html',
+})
+
+describe('PopDateRange Test', () => {
+  const component = new Vue(PopDateRange)
+
+  it('should calculate the max start date', () => {
+    component.contractEnd = new Date('2020-01-01')
+    const date = new Date('2019-12-31')
+    expect(component.calcMaxStartDate(date)).toEqual(date)
+  })
+
+  it('should calculate the min end date', () => {
+    component.contractStart = new Date('2020-01-01')
+    const date = new Date('2020-02-02')
+    expect(component.calcMinEndDate(date)).toEqual(date)
+  })
+
+  it('should add an error to the start date if it is out of range', () => {
+    const wrapper = mount(PopDateRangeWrapper, {
+      propsData: {
+        initialData: {},
+      },
+    })
+
+    const error = ['usa-input--error']
+    var startDateField = wrapper.find('fieldset[name="start_date"]')
+    var endDateField = wrapper.find('fieldset[name="end_date"]')
+
+    // set valid date range
+    startDateField.find('input[name="date-month"]').setValue('01')
+    startDateField.find('input[name="date-day"]').setValue('01')
+    startDateField.find('input[name="date-year"]').setValue('2020')
+
+    endDateField.find('input[name="date-month"]').setValue('01')
+    endDateField.find('input[name="date-day"]').setValue('01')
+    endDateField.find('input[name="date-year"]').setValue('2021')
+
+    // manually trigger the change event in the hidden fields
+    startDateField.find('input[name="start_date"]').trigger('change')
+    endDateField.find('input[name="end_date"]').trigger('change')
+
+    // check that both dates do not have error class
+    expect(startDateField.classes()).toEqual(expect.not.arrayContaining(error))
+    expect(endDateField.classes()).toEqual(expect.not.arrayContaining(error))
+
+    // update start date to be after end date and trigger change event
+    startDateField.find('input[name="date-year"]').setValue('2022')
+    startDateField.find('input[name="start_date"]').trigger('change')
+
+    expect(startDateField.classes()).toEqual(expect.arrayContaining(error))
+    expect(endDateField.classes()).toEqual(expect.not.arrayContaining(error))
+  })
+
+  it('should add an error to the end date if it is out of range', () => {
+    const wrapper = mount(PopDateRangeWrapper, {
+      propsData: {
+        initialData: {},
+      },
+    })
+
+    const error = ['usa-input--error']
+    var startDateField = wrapper.find('fieldset[name="start_date"]')
+    var endDateField = wrapper.find('fieldset[name="end_date"]')
+
+    // set valid date range
+    startDateField.find('input[name="date-month"]').setValue('01')
+    startDateField.find('input[name="date-day"]').setValue('01')
+    startDateField.find('input[name="date-year"]').setValue('2020')
+
+    endDateField.find('input[name="date-month"]').setValue('01')
+    endDateField.find('input[name="date-day"]').setValue('01')
+    endDateField.find('input[name="date-year"]').setValue('2021')
+
+    // manually trigger the change event in the hidden fields
+    startDateField.find('input[name="start_date"]').trigger('change')
+    endDateField.find('input[name="end_date"]').trigger('change')
+
+    // check that both dates do not have error class
+    expect(startDateField.classes()).toEqual(expect.not.arrayContaining(error))
+    expect(endDateField.classes()).toEqual(expect.not.arrayContaining(error))
+
+    // update end date to be before end date and trigger change event
+    endDateField.find('input[name="date-year"]').setValue('2019')
+    endDateField.find('input[name="end_date"]').trigger('change')
+
+    expect(startDateField.classes()).toEqual(expect.not.arrayContaining(error))
+    expect(endDateField.classes()).toEqual(expect.arrayContaining(error))
+  })
+})