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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_quietly
old_stdout_position, old_stderr_position = STDOUT.tell, STDERR.tell
quietly do
puts 'see me, feel me'
STDERR.puts 'touch me, heal me'
end
assert_equal old_stdout_position, STDOUT.tell
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
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