require_relative '../../spec_helper' require 'pathname' describe "Pathname#relative_path_from" do def relative_path_str(dest, base) Pathname.new(dest).relative_path_from(Pathname.new(base)).to_s end it "raises an error when the two paths do not share a common prefix" do lambda { relative_path_str('/usr', 'foo') }.should raise_error(ArgumentError) end it "raises an error when the base directory has .." do lambda { relative_path_str('a', '..') }.should raise_error(ArgumentError) end it "returns a path relative from root" do relative_path_str('/usr', '/').should == 'usr' end it 'returns 1 level up when both paths are relative' do relative_path_str('a', 'b').should == '../a' relative_path_str('a', 'b/').should == '../a' end it 'returns a relative path when both are absolute' do relative_path_str('/a', '/b').should == '../a' end it "returns a path relative to the current directory" do relative_path_str('/usr/bin/ls', '/usr').should == 'bin/ls' end it 'returns a . when base and dest are the same' do relative_path_str('/usr', '/usr').should == '.' end it 'returns the same directory with a non clean base that matches the current dir' do relative_path_str('/usr', '/stuff/..').should == 'usr' end it 'returns a relative path with a non clean base that matches a different dir' do relative_path_str('/usr', '/stuff/../foo').should == '../usr' end it 'returns current and pattern when only those patterns are used' do relative_path_str('.', '.').should == '.' relative_path_str('..', '..').should == '.' relative_path_str('..', '.').should == '..' end end