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Validating v-Model Transformations for Baidu Mini Program in uni-app

This test suite validates v-model functionality in the Baidu Mini Program context within uni-app, focusing on component data binding and form input handling. The tests verify both basic and complex v-model implementations across different UI elements.

Test Coverage Overview

The test suite provides comprehensive coverage of v-model transformations in the Baidu Mini Program environment.

Key areas tested include:

Component v-model binding with and without cache
Form input elements (input and textarea) v-model implementation
Combined v-model and event handling scenarios
Transform logic for template syntax and runtime handlers

Implementation Analysis

The testing approach uses a custom assert utility to verify template transformations and runtime handler generation.

The tests validate both the generated template syntax (using s-if and binding attributes) and the corresponding JavaScript runtime code. Particular attention is paid to the transformation of Vue’s v-model directive into Baidu Mini Program’s specific binding syntax.

Technical Details

Testing infrastructure includes:

Jest as the test runner
Custom assert utility for template comparison
Transform functions for handling template compilation
Runtime handler generation verification
Cache handling configuration options

Best Practices Demonstrated

The test suite exemplifies strong testing practices through modular test organization and comprehensive coverage.

Notable practices include:

Isolated test cases for each v-model scenario
Explicit verification of both template and runtime output
Clear test case organization by component type
Thorough validation of transformation edge cases

dcloudio/uni-app

packages/uni-mp-baidu/__tests__/vModel.spec.ts

            
import { assert } from './testUtils'

describe('mp-baidu: transform v-model', () => {
  test(`component v-model`, () => {
    assert(
      `<Comp v-model="model" />`,
      `<comp s-if="{{b}}" u-i="2a9ec0b0-0" eO="{{a}}" bindupdateModelValue="__e" u-p="{{b}}"/>`,
      `(_ctx, _cache) => {
  return { a: _j({ 'updateModelValue': _o($event => _ctx.model = $event) }), b: _p({ modelValue: _ctx.model }) }
}`
    )
  })
  test(`component v-model with cache`, () => {
    assert(
      `<Comp v-model="model" />`,
      `<comp s-if="{{b}}" u-i="2a9ec0b0-0" eO="{{a}}" bindupdateModelValue="__e" u-p="{{b}}"/>`,
      `(_ctx, _cache) => {
  return { a: _j({ 'updateModelValue': _o($event => _ctx.model = $event) }), b: _p({ modelValue: _ctx.model }) }
}`,
      {
        cacheHandlers: true,
      }
    )
  })
  test(`input,textarea v-model`, () => {
    assert(
      `<input v-model="model" />`,
      `<input value="{{a}}" bindinput="{{b}}"/>`,
      `(_ctx, _cache) => {
  return { a: _ctx.model, b: _o($event => _ctx.model = $event.detail.value) }
}`
    )
    assert(
      `<textarea v-model="model" />`,
      `<textarea value="{{a}}" bindinput="{{b}}"/>`,
      `(_ctx, _cache) => {
  return { a: _ctx.model, b: _o($event => _ctx.model = $event.detail.value) }
}`
    )
  })
  test(`input v-model + v-on`, () => {
    assert(
      `<input @input="input" v-model="model" />`,
      `<input bindinput="{{a}}" value="{{b}}"/>`,
      `(_ctx, _cache) => {
  return { a: _o([$event => _ctx.model = $event.detail.value, _ctx.input]), b: _ctx.model }
}`
    )
  })
})