xiangyixiangqin/miniapp/__tests__/properties/exchange.property.test.js

/**
 * Property-based tests for exchange request UI functionality
 * **Feature: miniapp-frontend, Property 15: Exchange Request UI**
 * **Validates: Requirements 7.4**
 */

import { describe, it, expect } from 'vitest'
import * as fc from 'fast-check'

/**
 * Message type constants
 * 与后端 MessageType 枚举保持一致
 */
const MessageType = {
  TEXT: 1,
  VOICE: 2,
  IMAGE: 3,
  EXCHANGE_WECHAT: 4,
  EXCHANGE_WECHAT_RESULT: 5,
  EXCHANGE_PHOTO: 6,
  EXCHANGE_PHOTO_RESULT: 7
}

/**
 * Exchange status constants
 */
const ExchangeStatus = {
  PENDING: 0,
  ACCEPTED: 1,
  REJECTED: 2
}

/**
 * Helper functions for exchange request UI validation
 * These mirror the validation logic in the chat page
 */

/**
 * Determine if a message is an exchange type message
 * @param {number} messageType - Message type
 * @returns {boolean} Whether the message is an exchange type
 */
export function isExchangeMessage(messageType) {
  return messageType === MessageType.EXCHANGE_WECHAT || messageType === MessageType.EXCHANGE_PHOTO
}

/**
 * Determine if exchange action buttons should be shown
 * Property 15: Exchange Request UI
 * @param {Object} message - Message object
 * @param {boolean} message.isMine - Whether the message is sent by current user
 * @param {number} message.messageType - Message type
 * @param {number} message.status - Exchange status
 * @returns {boolean} Whether to show accept/reject buttons
 */
export function shouldShowExchangeActions(message) {
  // Only show actions for exchange messages
  if (!isExchangeMessage(message.messageType)) {
    return false
  }
  
  // Only show actions for received messages (not mine)
  if (message.isMine) {
    return false
  }
  
  // Only show actions when status is pending
  return message.status === ExchangeStatus.PENDING
}

/**
 * Get the exchange title text based on message
 * @param {Object} message - Message object
 * @param {boolean} message.isMine - Whether the message is sent by current user
 * @param {number} message.messageType - Message type
 * @returns {string} Title text
 */
export function getExchangeTitle(message) {
  if (message.messageType === MessageType.EXCHANGE_WECHAT) {
    return message.isMine ? '您发起了交换微信请求' : '对方想和您交换微信'
  }
  if (message.messageType === MessageType.EXCHANGE_PHOTO) {
    return message.isMine ? '您发起了交换照片请求' : '对方想和您交换照片'
  }
  return ''
}

/**
 * Get the exchange status text
 * @param {Object} message - Message object
 * @param {boolean} message.isMine - Whether the message is sent by current user
 * @param {number} message.status - Exchange status
 * @returns {string} Status text
 */
export function getExchangeStatusText(message) {
  if (message.status === ExchangeStatus.ACCEPTED) {
    return '已接受'
  }
  if (message.status === ExchangeStatus.REJECTED) {
    return '已拒绝'
  }
  if (message.isMine && message.status === ExchangeStatus.PENDING) {
    return '等待对方回应'
  }
  return ''
}

/**
 * Determine if exchange result should be shown
 * @param {Object} message - Message object
 * @returns {boolean} Whether to show exchange result
 */
export function shouldShowExchangeResult(message) {
  if (!isExchangeMessage(message.messageType)) {
    return false
  }
  
  // Show result when not showing actions
  return !shouldShowExchangeActions(message)
}

// Arbitrary generators for testing
const messageTypeArb = fc.constantFrom(
  MessageType.TEXT,
  MessageType.VOICE,
  MessageType.IMAGE,
  MessageType.EXCHANGE_WECHAT,
  MessageType.EXCHANGE_PHOTO
)

const exchangeMessageTypeArb = fc.constantFrom(
  MessageType.EXCHANGE_WECHAT,
  MessageType.EXCHANGE_PHOTO
)

const exchangeStatusArb = fc.constantFrom(
  ExchangeStatus.PENDING,
  ExchangeStatus.ACCEPTED,
  ExchangeStatus.REJECTED
)

const messageArb = fc.record({
  id: fc.integer({ min: 1, max: 1000000 }),
  isMine: fc.boolean(),
  messageType: messageTypeArb,
  status: exchangeStatusArb,
  content: fc.string()
})

const exchangeMessageArb = fc.record({
  id: fc.integer({ min: 1, max: 1000000 }),
  isMine: fc.boolean(),
  messageType: exchangeMessageTypeArb,
  status: exchangeStatusArb,
  content: fc.string()
})

describe('Exchange Request UI Property Tests', () => {
  /**
   * Property 15: Exchange Request UI
   * *For any* chat message with exchange type (WeChat or Photo),
   * the message SHALL display accept/reject buttons for the receiver.
   * **Validates: Requirements 7.4**
   */
  describe('Property 15: Exchange Request UI', () => {
    it('should show exchange actions only for received pending exchange messages', () => {
      fc.assert(
        fc.property(
          exchangeMessageArb,
          (message) => {
            const showActions = shouldShowExchangeActions(message)
            
            // Should show actions only when:
            // 1. Not my message (received)
            // 2. Status is pending
            const expectedShowActions = !message.isMine && message.status === ExchangeStatus.PENDING
            
            return showActions === expectedShowActions
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should never show exchange actions for sent messages', () => {
      fc.assert(
        fc.property(
          fc.record({
            id: fc.integer({ min: 1, max: 1000000 }),
            isMine: fc.constant(true), // My message
            messageType: exchangeMessageTypeArb,
            status: exchangeStatusArb,
            content: fc.string()
          }),
          (message) => {
            return shouldShowExchangeActions(message) === false
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should never show exchange actions for non-pending messages', () => {
      fc.assert(
        fc.property(
          fc.record({
            id: fc.integer({ min: 1, max: 1000000 }),
            isMine: fc.boolean(),
            messageType: exchangeMessageTypeArb,
            status: fc.constantFrom(ExchangeStatus.ACCEPTED, ExchangeStatus.REJECTED),
            content: fc.string()
          }),
          (message) => {
            return shouldShowExchangeActions(message) === false
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should never show exchange actions for non-exchange messages', () => {
      fc.assert(
        fc.property(
          fc.record({
            id: fc.integer({ min: 1, max: 1000000 }),
            isMine: fc.boolean(),
            messageType: fc.constantFrom(MessageType.TEXT, MessageType.VOICE, MessageType.IMAGE),
            status: exchangeStatusArb,
            content: fc.string()
          }),
          (message) => {
            return shouldShowExchangeActions(message) === false
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should show exchange actions for received pending exchange messages', () => {
      fc.assert(
        fc.property(
          fc.record({
            id: fc.integer({ min: 1, max: 1000000 }),
            isMine: fc.constant(false), // Received message
            messageType: exchangeMessageTypeArb,
            status: fc.constant(ExchangeStatus.PENDING),
            content: fc.string()
          }),
          (message) => {
            return shouldShowExchangeActions(message) === true
          }
        ),
        { numRuns: 100 }
      )
    })
  })

  /**
   * Exchange title text tests
   */
  describe('Exchange Title Text', () => {
    it('should return correct title for WeChat exchange messages', () => {
      fc.assert(
        fc.property(
          fc.boolean(), // isMine
          (isMine) => {
            const message = {
              isMine,
              messageType: MessageType.EXCHANGE_WECHAT
            }
            const title = getExchangeTitle(message)
            
            if (isMine) {
              return title === '您发起了交换微信请求'
            } else {
              return title === '对方想和您交换微信'
            }
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should return correct title for Photo exchange messages', () => {
      fc.assert(
        fc.property(
          fc.boolean(), // isMine
          (isMine) => {
            const message = {
              isMine,
              messageType: MessageType.EXCHANGE_PHOTO
            }
            const title = getExchangeTitle(message)
            
            if (isMine) {
              return title === '您发起了交换照片请求'
            } else {
              return title === '对方想和您交换照片'
            }
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should return empty string for non-exchange messages', () => {
      fc.assert(
        fc.property(
          fc.boolean(),
          fc.constantFrom(MessageType.TEXT, MessageType.VOICE, MessageType.IMAGE),
          (isMine, messageType) => {
            const message = { isMine, messageType }
            return getExchangeTitle(message) === ''
          }
        ),
        { numRuns: 100 }
      )
    })
  })

  /**
   * Exchange status text tests
   */
  describe('Exchange Status Text', () => {
    it('should return "已接受" for accepted status', () => {
      fc.assert(
        fc.property(
          fc.boolean(), // isMine
          (isMine) => {
            const message = {
              isMine,
              status: ExchangeStatus.ACCEPTED
            }
            return getExchangeStatusText(message) === '已接受'
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should return "已拒绝" for rejected status', () => {
      fc.assert(
        fc.property(
          fc.boolean(), // isMine
          (isMine) => {
            const message = {
              isMine,
              status: ExchangeStatus.REJECTED
            }
            return getExchangeStatusText(message) === '已拒绝'
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should return "等待对方回应" for sent pending messages', () => {
      fc.assert(
        fc.property(
          fc.constant(true), // isMine = true
          fc.constant(ExchangeStatus.PENDING),
          (isMine, status) => {
            const message = { isMine, status }
            return getExchangeStatusText(message) === '等待对方回应'
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should return empty string for received pending messages', () => {
      fc.assert(
        fc.property(
          fc.constant(false), // isMine = false
          fc.constant(ExchangeStatus.PENDING),
          (isMine, status) => {
            const message = { isMine, status }
            return getExchangeStatusText(message) === ''
          }
        ),
        { numRuns: 100 }
      )
    })
  })

  /**
   * Exchange result display tests
   */
  describe('Exchange Result Display', () => {
    it('should show result when not showing actions for exchange messages', () => {
      fc.assert(
        fc.property(
          exchangeMessageArb,
          (message) => {
            const showActions = shouldShowExchangeActions(message)
            const showResult = shouldShowExchangeResult(message)
            
            // For exchange messages, either actions or result should be shown, but not both
            return showActions !== showResult
          }
        ),
        { numRuns: 100 }
      )
    })

    it('should not show result for non-exchange messages', () => {
      fc.assert(
        fc.property(
          fc.record({
            id: fc.integer({ min: 1, max: 1000000 }),
            isMine: fc.boolean(),
            messageType: fc.constantFrom(MessageType.TEXT, MessageType.VOICE, MessageType.IMAGE),
            status: exchangeStatusArb,
            content: fc.string()
          }),
          (message) => {
            return shouldShowExchangeResult(message) === false
          }
        ),
        { numRuns: 100 }
      )
    })
  })

  /**
   * Combined property: UI consistency
   */
  describe('UI Consistency', () => {
    it('should have mutually exclusive actions and result display for exchange messages', () => {
      fc.assert(
        fc.property(
          exchangeMessageArb,
          (message) => {
            const showActions = shouldShowExchangeActions(message)
            const showResult = shouldShowExchangeResult(message)
            
            // Exactly one should be true for exchange messages
            return (showActions && !showResult) || (!showActions && showResult)
          }
        ),
        { numRuns: 100 }
      )
    })
  })
})