import { fileExtensionWithSeparator, fileExtension } from '../pathHelper';

describe('fileExtensionWithSeparator', () => {
  it('should return the extension of a file', () => {
    expect(
      fileExtensionWithSeparator('index.html')
    ).toEqual(
      '.html'
    );
  });

  it('should return the extension of a file path', () => {
    expect(
      fileExtensionWithSeparator('/src/main/index.html')
    ).toEqual(
      '.html'
    );
  });

  it('should return the extension of a file path with trailing slash', () => {
    expect(
      fileExtensionWithSeparator('/src/main/index.html/')
    ).toEqual(
      '.html'
    );
  });

  it('should return the extension for an extension with two ..', () => {
    expect(
      fileExtensionWithSeparator('/src/main/index..html')
    ).toEqual(
      '.html'
    );
  });

  it('should return an empty string for the parent path ..', () => {
    expect(
      fileExtensionWithSeparator('..')
    ).toEqual(
      ''
    );
  });

  it('should return an empty string if the file has no extension', () => {
    expect(
      fileExtensionWithSeparator('/src/main/index')
    ).toEqual(
      ''
    );
  });
});

describe('fileExtension', () => {
  it('should return the extension of a file', () => {
    expect(
      fileExtension('index.html')
    ).toEqual(
      'html'
    );
  });

  it('should return the extension of a file path', () => {
    expect(
      fileExtension('/src/main/index.html')
    ).toEqual(
      'html'
    );
  });

  it('should return the extension of a file path with trailing slash', () => {
    expect(
      fileExtension('/src/main/index.html/')
    ).toEqual(
      'html'
    );
  });

  it('should return the extension for an extension with two ..', () => {
    expect(
      fileExtension('/src/main/index..html')
    ).toEqual(
      'html'
    );
  });

  it('should return an empty string for the parent path ..', () => {
    expect(
      fileExtension('..')
    ).toEqual(
      ''
    );
  });

  it('should return an empty string if the file has no extension', () => {
    expect(
      fileExtension('/src/main/index')
    ).toEqual(
      ''
    );
  });
});