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Testing Fibonacci Sequence Generation in javascript-algorithms

This test suite validates the Fibonacci sequence generation function, ensuring accurate calculation of number sequences based on input parameters. The tests verify both basic sequence generation and proper array output formatting.

Test Coverage Overview

The test coverage focuses on validating the Fibonacci sequence generator across multiple input values.

Key areas tested include:

Sequence generation for inputs 1 through 10
Correct array output formatting
Proper sequence progression validation
Accurate number calculations

Implementation Analysis

The testing approach utilizes Jest’s expect assertions to verify sequence generation accuracy. The implementation employs a straightforward pattern of sequential test cases, leveraging Jest’s toEqual matcher for array comparison.

Framework features utilized:

Jest describe blocks for test organization
Array equality checking
Single test case with multiple assertions

Technical Details

Testing infrastructure includes:

Jest testing framework
ES6 module imports
Array comparison utilities
Describe/It block structure

Best Practices Demonstrated

The test suite exemplifies several testing best practices in its implementation. Notable aspects include clear test case organization, comprehensive sequence validation, and efficient test structure.

Key practices:

Progressive test cases
Consistent assertion pattern
Clear test descriptions
Focused test scope

trekhleb/javascript-algorithms

src/algorithms/math/fibonacci/__test__/fibonacci.test.js

            
import fibonacci from '../fibonacci';

describe('fibonacci', () => {
  it('should calculate fibonacci correctly', () => {
    expect(fibonacci(1)).toEqual([1]);
    expect(fibonacci(2)).toEqual([1, 1]);
    expect(fibonacci(3)).toEqual([1, 1, 2]);
    expect(fibonacci(4)).toEqual([1, 1, 2, 3]);
    expect(fibonacci(5)).toEqual([1, 1, 2, 3, 5]);
    expect(fibonacci(6)).toEqual([1, 1, 2, 3, 5, 8]);
    expect(fibonacci(7)).toEqual([1, 1, 2, 3, 5, 8, 13]);
    expect(fibonacci(8)).toEqual([1, 1, 2, 3, 5, 8, 13, 21]);
    expect(fibonacci(9)).toEqual([1, 1, 2, 3, 5, 8, 13, 21, 34]);
    expect(fibonacci(10)).toEqual([1, 1, 2, 3, 5, 8, 13, 21, 34, 55]);
  });
});