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Testing Sequential Identifier Generation in uni-app

This test suite validates the IdentifierGenerator class functionality in uni-app’s compiler, focusing on sequential identifier generation patterns. It verifies the incremental generation of unique identifiers from single characters to multi-character combinations.

Test Coverage Overview

The test suite provides comprehensive coverage of the IdentifierGenerator’s sequential ID generation capabilities.

Key areas tested include:

Single character ID generation (a-z)
Multi-character ID generation (ab, ac, etc.)
Large-scale sequential generation
Boundary transitions between different ID lengths

Implementation Analysis

The testing approach employs Jest’s describe/test structure with systematic verification of identifier sequences. The implementation uses expect().toBe() assertions to validate exact string matches, with strategic loop iterations to test identifier evolution across different character lengths.

Technical patterns include:

Sequential assertion chains
Controlled iteration testing
Boundary condition verification

Technical Details

Testing infrastructure includes:

Jest testing framework
TypeScript for type safety
IdentifierGenerator class implementation
Sequential string comparison assertions
Iteration-based sequence validation

Best Practices Demonstrated

The test suite exemplifies several testing best practices in identifier generation validation.

Notable practices include:

Systematic progression testing
Boundary condition verification
Predictable sequence validation
Clear test case organization
Efficient iteration handling

dcloudio/uni-app

packages/uni-mp-compiler/__tests__/identifier.spec.ts

            
import IdentifierGenerator from '../src/identifier'
const ids = new IdentifierGenerator()
describe('identifier', () => {
  test('id', () => {
    expect(ids.next()).toBe('a')
    expect(ids.next()).toBe('b')
    for (let i = 0; i < 50; i++) {
      ids.next()
    }
    expect(ids.next()).toBe('ab')
    expect(ids.next()).toBe('ac')
    // do if in 已被忽略
    for (let i = 0; i < 52 * 52 - 2; i++) {
      ids.next()
    }
    expect(ids.next()).toBe('acf')
    expect(ids.next()).toBe('acg')
  })
})