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Testing Ref Transformation Implementation in uni-app Alipay Mini-Program

This test suite validates ref transformation functionality in the uni-app framework’s Alipay mini-program implementation. It focuses on testing static and dynamic ref bindings, component instances, and various setup configurations.

Test Coverage Overview

The test suite provides comprehensive coverage of ref transformation scenarios in the Alipay mini-program context.

Basic component rendering without refs
Static ref implementations with single and multiple components
Dynamic ref handling with v-for directives
Setup-ref, setup-maybe-ref, and setup-let binding types

Implementation Analysis

The testing approach utilizes Jest’s describe/test structure with custom assertion utilities. It implements transformation testing through template comparison and rendered output validation.

The tests specifically verify the correct generation of Alipay-specific attributes like u-i, u-r, and onVI, ensuring proper component lifecycle management.

Technical Details

Testing Framework: Jest
Custom Assertion Utility: assert()
Vue Compiler Core Integration
Component Resolution Testing
Binding Types from @vue/compiler-core

Best Practices Demonstrated

The test suite exhibits strong testing practices through systematic organization and comprehensive coverage.

Isolated test cases for each ref scenario
Explicit input/output validation
Complex transformation verification
Framework-specific attribute testing

dcloudio/uni-app

packages/uni-mp-alipay/__tests__/ref.spec.ts

            
import { BindingTypes } from '@vue/compiler-core'
import { assert } from './testUtils'

describe('mp-alipay: transform ref', () => {
  test('without ref', () => {
    assert(
      `<custom/>`,
      `<custom u-i="2a9ec0b0-0" onVI="__l"/>`,
      `(_ctx, _cache) => {
  return {}
}`
    )
    assert(
      `<custom/><custom/><custom1/>`,
      `<custom u-i="2a9ec0b0-0" onVI="__l"/><custom u-i="2a9ec0b0-1" onVI="__l"/><custom1 u-i="2a9ec0b0-2" onVI="__l"/>`,
      `(_ctx, _cache) => {
  return {}
}`
    )
  })

  test('static ref', () => {
    assert(
      `<custom ref="custom"/>`,
      `<custom ref="__r" u-r="custom" u-i="2a9ec0b0-0" onVI="__l"/>`,
      `import { resolveComponent as _resolveComponent } from "vue"
const __BINDING_COMPONENTS__ = '{"custom":{"name":"_component_custom","type":"unknown"}}'
if (!Array) {const _component_custom = _resolveComponent("custom");(_component_custom)()}

export function render(_ctx, _cache) {
  return {}
}`,
      {
        inline: false,
      }
    )
    assert(
      `<custom v-for="item in items" ref="custom"/>`,
      `<custom a:for="{{a}}" a:for-item="item" ref="__r" u-r-i-f="custom" u-i="{{item.a}}" onVI="__l"/>`,
      `import { resolveComponent as _resolveComponent, f as _f } from "vue"
const __BINDING_COMPONENTS__ = '{"custom":{"name":"_component_custom","type":"unknown"}}'
if (!Array) {const _component_custom = _resolveComponent("custom");(_component_custom)()}

export function render(_ctx, _cache) {
  return { a: _f(_ctx.items, (item, k0, i0) => { return { a: '2a9ec0b0-0' + '-' + i0 }; }) }
}`,
      {
        inline: false,
      }
    )
  })
  test('static ref with inline', () => {
    assert(
      `<custom ref="custom"/>`,
      `<custom ref="__r" u-r="{{a}}" u-i="2a9ec0b0-0" onVI="__l"/>`,
      `(_ctx, _cache) => {
  return { a: () => ({ r: custom }) }
}`
    )
    assert(
      `<custom v-for="item in items" ref="custom"/>`,
      `<custom a:for="{{a}}" a:for-item="item" ref="__r" u-r-i-f="{{b}}" u-i="{{item.a}}" onVI="__l"/>`,
      `(_ctx, _cache) => {
  return { a: _f(_ctx.items, (item, k0, i0) => { return { a: '2a9ec0b0-0' + '-' + i0 }; }), b: () => ({ r: custom, f: 1 }) }
}`
    )
  })
  test('static ref with inline and setup-ref', () => {
    assert(
      `<custom ref="custom"/>`,
      `<custom ref="__r" u-r="{{a}}" u-i="2a9ec0b0-0" onVI="__l"/>`,
      `(_ctx, _cache) => {
  return { a: () => ({ r: custom, k: 'custom' }) }
}`,
      {
        bindingMetadata: {
          custom: BindingTypes.SETUP_REF,
        },
      }
    )
  })
  test('static ref with inline and setup-maybe-ref', () => {
    assert(
      `<custom ref="custom"/>`,
      `<custom ref="__r" u-r="{{a}}" u-i="2a9ec0b0-0" onVI="__l"/>`,
      `(_ctx, _cache) => {
  return { a: () => ({ r: custom, k: 'custom' }) }
}`,
      {
        bindingMetadata: {
          custom: BindingTypes.SETUP_MAYBE_REF,
        },
      }
    )
  })
  test('static ref with inline and setup-let', () => {
    assert(
      `<custom ref="custom"/>`,
      `<custom ref="__r" u-r="{{a}}" u-i="2a9ec0b0-0" onVI="__l"/>`,
      `(_ctx, _cache) => {
  return { a: () => ({ r: custom, k: 'custom' }) }
}`,
      {
        bindingMetadata: {
          custom: BindingTypes.SETUP_LET,
        },
      }
    )
  })
  test('dynamic ref', () => {
    assert(
      `<custom :ref="custom"/>`,
      `<custom ref="__r" u-r="{{a}}" u-i="2a9ec0b0-0" onVI="__l"/>`,
      `import { resolveComponent as _resolveComponent } from "vue"
const __BINDING_COMPONENTS__ = '{"custom":{"name":"_component_custom","type":"unknown"}}'
if (!Array) {const _component_custom = _resolveComponent("custom");(_component_custom)()}

export function render(_ctx, _cache) {
  return { a: _ctx.custom }
}`,
      {
        inline: false,
      }
    )
    assert(
      `<custom v-for="item in items" :ref="custom"/>`,
      `<custom a:for="{{a}}" a:for-item="item" ref="__r" u-r-i-f="{{b}}" u-i="{{item.a}}" onVI="__l"/>`,
      `import { resolveComponent as _resolveComponent, f as _f } from "vue"
const __BINDING_COMPONENTS__ = '{"custom":{"name":"_component_custom","type":"unknown"}}'
if (!Array) {const _component_custom = _resolveComponent("custom");(_component_custom)()}

export function render(_ctx, _cache) {
  return { a: _f(_ctx.items, (item, k0, i0) => { return { a: '2a9ec0b0-0' + '-' + i0 }; }), b: _ctx.custom }
}`,
      {
        inline: false,
      }
    )
  })
})