Back to Repositories

Testing Binary Floating-Point Conversion in javascript-algorithms

This test suite validates the conversion of floating-point numbers to their binary string representations in both 32-bit and 64-bit formats. It ensures accurate binary encoding of decimal numbers according to IEEE 754 floating-point standards.

Test Coverage Overview

The test suite provides comprehensive coverage for floating-point binary conversion functionality.

Key areas tested include:

32-bit floating-point conversion accuracy
64-bit floating-point conversion accuracy
Multiple test cases through array iteration
Decimal to binary string transformation

Implementation Analysis

The testing approach utilizes Jest’s describe/it blocks for organized test grouping. It implements iterative testing through arrays of test cases, comparing expected binary strings with actual conversion outputs.

Notable patterns include:

Parallel test structure for 32-bit and 64-bit conversions
Array destructuring for test case handling
Jest’s expect().toBe() for strict equality checking

Technical Details

Testing infrastructure includes:

Jest testing framework
External test case arrays (testCases32Bits, testCases64Bits)
Two main conversion functions: floatAs32BinaryString and floatAs64BinaryString
Binary string comparison for verification

Best Practices Demonstrated

The test suite exemplifies several testing best practices.

Notable implementations include:

Separation of concerns between 32-bit and 64-bit tests
Reusable test case arrays
Consistent test structure across both conversion types
Clear test descriptions and expectations

trekhleb/javascript-algorithms

src/algorithms/math/binary-floating-point/__tests__/floatAsBinaryString.test.js

            
import { floatAs32BinaryString, floatAs64BinaryString } from '../floatAsBinaryString';
import { testCases32Bits, testCases64Bits } from '../testCases';

describe('floatAs32Binary', () => {
  it('should create a binary representation of the floating numbers', () => {
    for (let testCaseIndex = 0; testCaseIndex < testCases32Bits.length; testCaseIndex += 1) {
      const [decimal, binary] = testCases32Bits[testCaseIndex];
      expect(floatAs32BinaryString(decimal)).toBe(binary);
    }
  });
});

describe('floatAs64Binary', () => {
  it('should create a binary representation of the floating numbers', () => {
    for (let testCaseIndex = 0; testCaseIndex < testCases64Bits.length; testCaseIndex += 1) {
      const [decimal, binary] = testCases64Bits[testCaseIndex];
      expect(floatAs64BinaryString(decimal)).toBe(binary);
    }
  });
});