require 'abstract_unit' require 'active_support/core_ext/kernel' class KernelTest < ActiveSupport::TestCase def test_silence_warnings silence_warnings { assert_nil $VERBOSE } assert_equal 1234, silence_warnings { 1234 } end def test_silence_warnings_verbose_invariant old_verbose = $VERBOSE silence_warnings { raise } flunk rescue assert_equal old_verbose, $VERBOSE end def test_enable_warnings enable_warnings { assert_equal true, $VERBOSE } assert_equal 1234, enable_warnings { 1234 } end def test_enable_warnings_verbose_invariant old_verbose = $VERBOSE enable_warnings { raise } flunk rescue assert_equal old_verbose, $VERBOSE end def test_silence_stderr old_stderr_position = STDERR.tell silence_stderr { STDERR.puts 'hello world' } assert_equal old_stderr_position, STDERR.tell rescue Errno::ESPIPE # Skip if we can't STDERR.tell end def test_silence_stderr_with_return_value assert_equal 1, silence_stderr { 1 } end def test_class_eval o = Object.new class << o; @x = 1; end assert_equal 1, o.class_eval { @x } end def test_capture assert_equal 'STDERR', capture(:stderr) { $stderr.print 'STDERR' } assert_equal 'STDOUT', capture(:stdout) { print 'STDOUT' } assert_equal "STDERR\n", capture(:stderr) { system('echo STDERR 1>&2') } assert_equal "STDOUT\n", capture(:stdout) { system('echo STDOUT') } end end class KernelSuppressTest < ActiveSupport::TestCase def test_reraise assert_raise(LoadError) do suppress(ArgumentError) { raise LoadError } end end def test_suppression suppress(ArgumentError) { raise ArgumentError } suppress(LoadError) { raise LoadError } suppress(LoadError, ArgumentError) { raise LoadError } suppress(LoadError, ArgumentError) { raise ArgumentError } end end class MockStdErr attr_reader :output def puts(message) @output ||= [] @output << message end def info(message) puts(message) end def write(message) puts(message) end end class KernelDebuggerTest < ActiveSupport::TestCase def test_debugger_not_available_message_to_stderr old_stderr = $stderr $stderr = MockStdErr.new debugger assert_match(/Debugger requested/, $stderr.output.first) ensure $stderr = old_stderr end def test_debugger_not_available_message_to_rails_logger rails = Class.new do def self.logger @logger ||= MockStdErr.new end end Object.const_set(:Rails, rails) debugger assert_match(/Debugger requested/, rails.logger.output.first) ensure Object.send(:remove_const, :Rails) end end