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Testing Queen Position Tracking Implementation in javascript-algorithms

This test suite validates the QueenPosition class implementation for the N-Queens problem, ensuring accurate tracking of queen positions on a chessboard. The tests verify coordinate storage and diagonal calculations essential for solving the N-Queens puzzle.

Test Coverage Overview

The test suite covers fundamental position tracking functionality for the N-Queens algorithm implementation.

Tests coordinate storage (rowIndex, columnIndex)
Validates diagonal calculations (leftDiagonal, rightDiagonal)
Verifies string representation of positions
Includes boundary case testing with (0,0) position

Implementation Analysis

The testing approach uses Jest’s describe/it pattern for clear test organization. The implementation validates both basic position properties and derived calculations for diagonal positions.

Uses Jest’s expect assertions for property validation
Implements multiple test cases within single test block
Validates object method functionality (toString)

Technical Details

Testing Framework: Jest
Test Type: Unit Test
File Structure: Separate test file in __test__ directory
Implementation: ES6 class testing
Assertion Style: Jest expect syntax

Best Practices Demonstrated

The test file demonstrates clean and efficient testing practices for class-based implementations.

Clear test case organization
Comprehensive property testing
Multiple assertions within logical grouping
Descriptive test naming
Edge case consideration

trekhleb/javascript-algorithms

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

            
import QueenPosition from '../QueenPosition';

describe('QueenPosition', () => {
  it('should store queen position on chessboard', () => {
    const position1 = new QueenPosition(0, 0);
    const position2 = new QueenPosition(2, 1);

    expect(position2.columnIndex).toBe(1);
    expect(position2.rowIndex).toBe(2);
    expect(position1.leftDiagonal).toBe(0);
    expect(position1.rightDiagonal).toBe(0);
    expect(position2.leftDiagonal).toBe(1);
    expect(position2.rightDiagonal).toBe(3);
    expect(position2.toString()).toBe('2,1');
  });
});