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-rw-r--r--activesupport/test/test_case_test.rb106
1 files changed, 106 insertions, 0 deletions
diff --git a/activesupport/test/test_case_test.rb b/activesupport/test/test_case_test.rb
index 18228a2ac5..772c3cfca7 100644
--- a/activesupport/test/test_case_test.rb
+++ b/activesupport/test/test_case_test.rb
@@ -111,6 +111,112 @@ class AssertDifferenceTest < ActiveSupport::TestCase
end
end
end
+
+ def test_assert_changes_pass
+ assert_changes '@object.num' do
+ @object.increment
+ end
+ end
+
+ def test_assert_changes_pass_with_lambda
+ assert_changes -> { @object.num } do
+ @object.increment
+ end
+ end
+
+ def test_assert_changes_with_from_option
+ assert_changes '@object.num', from: 0 do
+ @object.increment
+ end
+ end
+
+ def test_assert_changes_with_from_option_with_wrong_value
+ assert_raises Minitest::Assertion do
+ assert_changes '@object.num', from: -1 do
+ @object.increment
+ end
+ end
+ end
+
+ def test_assert_changes_with_to_option
+ assert_changes '@object.num', to: 1 do
+ @object.increment
+ end
+ end
+
+ def test_assert_changes_with_wrong_to_option
+ assert_raises Minitest::Assertion do
+ assert_changes '@object.num', to: 2 do
+ @object.increment
+ end
+ end
+ end
+
+ def test_assert_changes_with_from_option_and_to_option
+ assert_changes '@object.num', from: 0, to: 1 do
+ @object.increment
+ end
+ end
+
+ def test_assert_changes_with_from_and_to_options_and_wrong_to_value
+ assert_raises Minitest::Assertion do
+ assert_changes '@object.num', from: 0, to: 2 do
+ @object.increment
+ end
+ end
+ end
+
+ def test_assert_changes_works_with_any_object
+ retval = silence_warnings do
+ assert_changes :@new_object, from: nil, to: 42 do
+ @new_object = 42
+ end
+ end
+
+ assert_equal 42, retval
+ end
+
+ def test_assert_changes_works_with_nil
+ oldval = @object
+
+ retval = assert_changes :@object, from: oldval, to: nil do
+ @object = nil
+ end
+
+ assert_nil retval
+ end
+
+ def test_assert_changes_with_to_and_case_operator
+ token = nil
+
+ assert_changes 'token', to: /\w{32}/ do
+ token = SecureRandom.hex
+ end
+ end
+
+ def test_assert_changes_with_to_and_from_and_case_operator
+ token = SecureRandom.hex
+
+ assert_changes 'token', from: /\w{32}/, to: /\w{32}/ do
+ token = SecureRandom.hex
+ end
+ end
+
+ def test_assert_no_changes_pass
+ assert_no_changes '@object.num' do
+ # ...
+ end
+ end
+
+ def test_assert_no_changes_with_message
+ error = assert_raises Minitest::Assertion do
+ assert_no_changes '@object.num', '@object.num should not change' do
+ @object.increment
+ end
+ end
+
+ assert_equal "@object.num should not change.\n\"@object.num\" did change to 1.\nExpected: 0\n Actual: 1", error.message
+ end
end
class AlsoDoingNothingTest < ActiveSupport::TestCase