Image Worker MCP

import { isValidInputFormat, isValidOutputFormat, isValidDimensions, isValidQuality, getFileExtension, base64ToBuffer, bufferToBase64, normalizeFilePath, // fetchImageFromUrl, // Requires mocking for proper unit testing } from '../src/utils'; import { SUPPORTED_INPUT_FORMATS, SUPPORTED_OUTPUT_FORMATS } from '../src/constants'; describe('Utility Functions', () => { describe('isValidInputFormat', () => { it('should return true for supported input formats', () => { SUPPORTED_INPUT_FORMATS.forEach(format => { expect(isValidInputFormat(format)).toBe(true); expect(isValidInputFormat(format.toUpperCase())).toBe(true); }); }); it('should return false for unsupported input formats', () => { expect(isValidInputFormat('bmp')).toBe(false); expect(isValidInputFormat('exe')).toBe(false); }); }); describe('isValidOutputFormat', () => { it('should return true for supported output formats', () => { SUPPORTED_OUTPUT_FORMATS.forEach(format => { expect(isValidOutputFormat(format)).toBe(true); expect(isValidOutputFormat(format.toUpperCase())).toBe(true); }); }); it('should return false for unsupported output formats', () => { expect(isValidOutputFormat('gif')).toBe(false); // Assuming gif is not in SUPPORTED_OUTPUT_FORMATS expect(isValidOutputFormat('tiff')).toBe(false); }); }); describe('isValidDimensions', () => { it('should return true for valid dimensions', () => { expect(isValidDimensions(100, 100)).toBe(true); expect(isValidDimensions(1, 1)).toBe(true); expect(isValidDimensions(10000, 10000)).toBe(true); expect(isValidDimensions(undefined, 100)).toBe(true); expect(isValidDimensions(100, undefined)).toBe(true); expect(isValidDimensions(undefined, undefined)).toBe(true); }); it('should return false for invalid dimensions', () => { expect(isValidDimensions(0, 100)).toBe(false); expect(isValidDimensions(100, 0)).toBe(false); expect(isValidDimensions(10001, 100)).toBe(false); expect(isValidDimensions(100, 10001)).toBe(false); }); }); describe('isValidQuality', () => { it('should return true for valid quality values', () => { expect(isValidQuality(1)).toBe(true); expect(isValidQuality(50)).toBe(true); expect(isValidQuality(100)).toBe(true); expect(isValidQuality(undefined)).toBe(true); }); it('should return false for invalid quality values', () => { expect(isValidQuality(0)).toBe(false); expect(isValidQuality(101)).toBe(false); }); }); describe('getFileExtension', () => { it('should return the correct extension in lowercase', () => { expect(getFileExtension('image.JPEG')).toBe('jpeg'); expect(getFileExtension('archive.tar.gz')).toBe('gz'); expect(getFileExtension('document.PDF')).toBe('pdf'); }); it('should return an empty string if no extension', () => { expect(getFileExtension('filename')).toBe(''); }); it('should handle files starting with a dot', () => { expect(getFileExtension('.bashrc')).toBe('bashrc'); expect(getFileExtension('.env.local')).toBe('local'); }); }); describe('base64ToBuffer', () => { it('should convert a base64 string to a Buffer', () => { const text = 'Hello World'; const base64Text = Buffer.from(text).toString('base64'); const buffer = base64ToBuffer(base64Text); expect(Buffer.isBuffer(buffer)).toBe(true); expect(buffer.toString()).toBe(text); }); it('should handle base64 strings with data URL prefix', () => { const text = 'Hello Again'; const base64TextWithPrefix = `data:image/png;base64,${Buffer.from(text).toString('base64')}`; const buffer = base64ToBuffer(base64TextWithPrefix); expect(Buffer.isBuffer(buffer)).toBe(true); expect(buffer.toString()).toBe(text); }); }); describe('bufferToBase64', () => { it('should convert a Buffer to a data URL base64 string', () => { const text = 'Buffer Test'; const buffer = Buffer.from(text); const mimeType = 'image/jpeg'; const base64String = bufferToBase64(buffer, mimeType); expect(base64String).toBe(`data:${mimeType};base64,${buffer.toString('base64')}`); }); }); describe('normalizeFilePath', () => { it('should replace escaped spaces with actual spaces', () => { expect(normalizeFilePath('a\\ file\\ name.png')).toBe('a file name.png'); }); it('should handle various escaped characters', () => { expect(normalizeFilePath('path\\ with\\\'quotes\\\'.txt')).toBe("path with'quotes'.txt"); expect(normalizeFilePath('path\\ with\\\"double\\ quotes\\\".txt')).toBe('path with"double quotes".txt'); expect(normalizeFilePath('path\\ with\\`backticks\\`.txt')).toBe('path with`backticks`.txt'); expect(normalizeFilePath('folder\\(parens\\).jpg')).toBe('folder(parens).jpg'); expect(normalizeFilePath('archive\\\\[brackets\\\\].zip')).toBe('archive[brackets].zip'); expect(normalizeFilePath('config\\{braces\\}.json')).toBe('config{braces}.json'); }); it('should return the same path if no escaped characters', () => { expect(normalizeFilePath('a/normal/path.txt')).toBe('a/normal/path.txt'); }); it('should handle mixed escaped and normal characters', () => { expect(normalizeFilePath('My\\ Documents/image\\(1\\).png')).toBe('My Documents/image(1).png'); }); }); });