# encoding: utf-8

require 'fedux_org_stdlib/core_ext/file/which'

RSpec.describe 'File' do
  around :example do |example|
    with_env 'PATH' => absolute_path('.') do
      example.run
    end
  end

  context '#which' do
    it 'returns path to command' do
      touch_file 'vim'
      filesystem_permissions '0755', 'vim'

      expect(File.which('vim')).to eq absolute_path('vim')
    end

    it 'uses a different search path' do
      touch_file 'vim'
      filesystem_permissions '0755', 'vim'
      expect(File.which('vim', absolute_path('.'))).to eq absolute_path('vim')
    end

    it 'returns nil if command could not be found' do
      expect(File.which('vim')).to be nil
    end

    it 'returns nil if command is not executable' do
      touch_file 'vim'
      filesystem_permissions '0644', 'vim'
      expect(File.which('vim')).to be nil
    end

    it 'returns nil if command is not a file' do
      create_dir 'vim'
      expect(File.which('vim')).to be nil
    end

    it 'supports ~' do
      with_env 'HOME' => absolute_path('.') do
        touch_file 'vim'
        filesystem_permissions '0755', 'vim'
        expect(File.which('vim', '~/')).to eq absolute_path('vim')
      end
    end

    it 'returns nil if command path is blank' do
      expect(File.which('')).to eq nil
      expect(File.which(nil)).to eq nil
      expect(File.which([])).to eq nil
    end

    it 'fails if search path is blank' do
      expect { File.which('vim', '') }.to raise_error ArgumentError
      expect { File.which('vim', nil) }.to raise_error ArgumentError
      expect { File.which('vim', []) }.to raise_error ArgumentError
    end
  end
end