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Testing Bitwise Power Set Generation in javascript-algorithms

This test suite validates the bitwise power set calculation algorithm implementation in JavaScript. It verifies the generation of all possible subsets from a given set using bitwise operations, ensuring both simple and complex input cases are handled correctly.

Test Coverage Overview

The test suite provides comprehensive coverage of the bitwise power set algorithm.

Key areas tested include:

Single element set validation
Multi-element set (3 elements) verification
Empty subset inclusion
All possible combinations generation

Edge cases covered include the base case of a single-element set and verification of the empty subset inclusion in results.

Implementation Analysis

The testing approach employs Jest’s expect assertions to validate the bwPowerSet function output. It uses array equality comparisons to verify the exact sequence and content of generated subsets.

Testing patterns include:

Direct output comparison with expected array structures
Nested array validation
Order verification of generated subsets

Technical Details

Testing infrastructure includes:

Jest testing framework
Array comparison utilities
ES6 module import system
Describe/It block structure for test organization

Best Practices Demonstrated

The test implementation showcases several testing best practices.

Notable elements include:

Clear test case isolation
Explicit expected vs actual value comparisons
Comprehensive subset verification
Logical test grouping using describe blocks
Descriptive test case naming

trekhleb/javascript-algorithms

src/algorithms/sets/power-set/__test__/bwPowerSet.test.js

            
import bwPowerSet from '../bwPowerSet';

describe('bwPowerSet', () => {
  it('should calculate power set of given set using bitwise approach', () => {
    expect(bwPowerSet([1])).toEqual([
      [],
      [1],
    ]);

    expect(bwPowerSet([1, 2, 3])).toEqual([
      [],
      [1],
      [2],
      [1, 2],
      [3],
      [1, 3],
      [2, 3],
      [1, 2, 3],
    ]);
  });
});