require File.expand_path('../../../spec_helper', __FILE__) require File.expand_path('../fixtures/classes', __FILE__) describe :kernel_system, shared: true do it "executes the specified command in a subprocess" do lambda { @object.system("echo a") }.should output_to_fd("a\n") $?.should be_an_instance_of Process::Status $?.success?.should == true end it "returns true when the command exits with a zero exit status" do @object.system(ruby_cmd('exit 0')).should == true $?.should be_an_instance_of Process::Status $?.success?.should == true $?.exitstatus.should == 0 end it "returns false when the command exits with a non-zero exit status" do @object.system(ruby_cmd('exit 1')).should == false $?.should be_an_instance_of Process::Status $?.success?.should == false $?.exitstatus.should == 1 end it "returns nil when command execution fails" do @object.system("sad").should be_nil $?.should be_an_instance_of Process::Status $?.pid.should be_kind_of(Integer) $?.exitstatus.should == 127 end it "does not write to stderr when command execution fails" do lambda { @object.system("sad") }.should output_to_fd("", STDERR) end platform_is_not :windows do before :each do @shell = ENV['SHELL'] end after :each do ENV['SHELL'] = @shell end it "executes with `sh` if the command contains shell characters" do lambda { @object.system("echo $0") }.should output_to_fd("sh\n") end it "ignores SHELL env var and always uses `sh`" do ENV['SHELL'] = "/bin/fakeshell" lambda { @object.system("echo $0") }.should output_to_fd("sh\n") end end before :each do ENV['TEST_SH_EXPANSION'] = 'foo' @shell_var = '$TEST_SH_EXPANSION' platform_is :windows do @shell_var = '%TEST_SH_EXPANSION%' end end after :each do ENV.delete('TEST_SH_EXPANSION') end it "expands shell variables when given a single string argument" do lambda { @object.system("echo #{@shell_var}") }.should output_to_fd("foo\n") end platform_is_not :windows do it "does not expand shell variables when given multiples arguments" do lambda { @object.system("echo", @shell_var) }.should output_to_fd("#{@shell_var}\n") end end platform_is :windows do it "does expand shell variables when given multiples arguments" do # See https://bugs.ruby-lang.org/issues/12231 lambda { @object.system("echo", @shell_var) }.should output_to_fd("foo\n") end end platform_is :windows do it "runs commands starting with any number of @ using shell" do `#{ruby_cmd("p system 'does_not_exist'")} 2>NUL`.chomp.should == "nil" @object.system('@does_not_exist 2>NUL').should == false @object.system("@@@#{ruby_cmd('exit 0')}").should == true end end end describe "Kernel#system" do it "is a private method" do Kernel.should have_private_instance_method(:system) end it_behaves_like :kernel_system, :system, KernelSpecs::Method.new end describe "Kernel.system" do it_behaves_like :kernel_system, :system, Kernel end