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Testing N-Queens Bitwise Algorithm Implementation in javascript-algorithms

This test suite validates the nQueensBitwise algorithm implementation, which calculates the number of possible solutions for placing N queens on an NxN chessboard using bitwise operations. The tests verify the accuracy of solution counts for board sizes ranging from 4 to 11 queens.

Test Coverage Overview

The test suite provides comprehensive coverage of the nQueensBitwise function across various board sizes.

Key areas tested include:

Solution counts for 4×4 through 11×11 boards
Verification of known solution counts
Progressive scaling of board sizes

Edge cases are addressed through testing both smaller (4×4) and larger (11×11) board configurations.

Implementation Analysis

The testing approach employs Jest’s describe/it pattern for structured test organization. Each test case uses expect().toBe() assertions to verify exact solution counts.

Technical implementation features:

Single test block covering multiple board sizes
Direct function result validation
Sequential size progression testing

Technical Details

Testing infrastructure includes:

Jest testing framework
ES6 module import syntax
Numeric equality assertions
Single describe block architecture
Inline test case execution

Best Practices Demonstrated

The test suite exhibits several testing best practices:

Consistent assertion pattern usage
Clear test case organization
Comprehensive size range coverage
Efficient test case grouping
Direct and focused test descriptions

trekhleb/javascript-algorithms

src/algorithms/uncategorized/n-queens/__test__/nQueensBitwise.test.js

            
import nQueensBitwise from '../nQueensBitwise';

describe('nQueensBitwise', () => {
  it('should have solutions for 4 to N queens', () => {
    expect(nQueensBitwise(4)).toBe(2);
    expect(nQueensBitwise(5)).toBe(10);
    expect(nQueensBitwise(6)).toBe(4);
    expect(nQueensBitwise(7)).toBe(40);
    expect(nQueensBitwise(8)).toBe(92);
    expect(nQueensBitwise(9)).toBe(352);
    expect(nQueensBitwise(10)).toBe(724);
    expect(nQueensBitwise(11)).toBe(2680);
  });
});