57 lines
1.1 KiB
Ruby
57 lines
1.1 KiB
Ruby
require File.dirname(__FILE__) + '/abstract_unit'
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class AssertDifferenceTest < Test::Unit::TestCase
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def setup
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@object = Class.new do
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attr_accessor :num
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def increment
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self.num += 1
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end
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def decrement
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self.num -= 1
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end
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end.new
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@object.num = 0
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end
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def test_assert_no_difference
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assert_no_difference '@object.num' do
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# ...
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end
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end
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def test_assert_difference
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assert_difference '@object.num', +1 do
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@object.increment
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end
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end
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def test_assert_difference_with_implicit_difference
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assert_difference '@object.num' do
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@object.increment
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end
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end
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def test_arbitrary_expression
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assert_difference '@object.num + 1', +2 do
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@object.increment
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@object.increment
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end
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end
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def test_negative_differences
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assert_difference '@object.num', -1 do
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@object.decrement
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end
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end
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def test_expression_is_evaluated_in_the_appropriate_scope
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local_scope = 'foo'
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silence_warnings do
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assert_difference('local_scope; @object.num') { @object.increment }
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end
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end
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end
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