aboutsummaryrefslogtreecommitdiffstats
path: root/activesupport/test/core_ext/kernel_test.rb
blob: e826ec161dbb1b669b3366caf402adb0cfb39613 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
require 'abstract_unit'

class KernelTest < Test::Unit::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
end