Back to Repositories

Testing Power Set Generation with Cascading Approach in javascript-algorithms

This test suite validates the cascading approach implementation of the power set algorithm in JavaScript. It ensures the correct generation of all possible subsets from a given set, including the empty set and the set itself.

Test Coverage Overview

The test coverage focuses on validating the caPowerSet function’s ability to generate power sets of different sizes.

Tests single element set generation
Verifies two-element set combinations
Validates three-element set permutations
Ensures empty set inclusion in results

Implementation Analysis

The testing approach utilizes Jest’s expect assertions to verify the exact matching of output arrays. The cascading algorithm implementation is tested through progressive complexity, starting from simple cases and moving to more complex scenarios.

Uses toEqual matcher for deep array comparison
Implements single test case with multiple expectations
Follows arrange-act-assert pattern

Technical Details

Testing Framework: Jest
Test Type: Unit Test
File Structure: Modular test file organization
Import Strategy: Direct module import
Assertion Style: Expect API

Best Practices Demonstrated

The test suite demonstrates clean testing practices with clear arrangement of test cases and expectations. It follows a systematic approach to validation with increasing complexity.

Descriptive test case naming
Structured test organization
Progressive complexity testing
Complete subset verification

trekhleb/javascript-algorithms

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

            
import caPowerSet from '../caPowerSet';

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

    expect(caPowerSet([1, 2])).toEqual([
      [],
      [1],
      [2],
      [1, 2],
    ]);

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