Feature #3917 » 0002-add-test-script-for-Kernel-called_from.patch
| test/ruby/test_called_from.rb | ||
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require 'test/unit'
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class TestCalledFrom < Test::Unit::TestCase
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def spec(text)
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yield
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end
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def setup
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#@fname = File.basename(__FILE__)
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#@fname = File.expand_path(File.basename(__FILE__))
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@fname = caller(0).first.split(/:\d+:in/).first
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end
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def f1(n)
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@f1_linenum = __LINE__ + 1
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f2(n)
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end
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def f2(n)
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@f2_linenum = __LINE__ + 1
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f3(n)
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end
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def f3(n)
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@f3_linenum = __LINE__ + 1
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f4(n)
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end
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def f4(n)
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@f4_linenum = __LINE__ + 1
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called_from(n)
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end
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def test_called_from_return_value
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spec 'returns array of filename, line number, and function name' do
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a = f1(nil)
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assert_equal([@fname, @f3_linenum, "f3"], a)
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end
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end
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def test_called_from_with_1
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spec 'if level is not specified then returns the same as arg 1 specified' do
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e = f1(1)
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a = f1(nil)
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assert_equal(e, a)
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end
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end
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def test_called_from_with_n
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spec 'level is specified then returns array according to level' do
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a = f1(2)
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assert_equal([@fname, @f2_linenum, "f2"], a)
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a = f1(3)
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assert_equal([@fname, @f1_linenum, "f1"], a)
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end
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end
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def test_called_from_too_deep
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spec 'called with too deep level then returns nil' do
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assert_nil(f1(100))
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end
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end
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def test_called_from_on_toplevel
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spec 'line number may be nil' do
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a = eval('called_from(0)', TOPLEVEL_BINDING)
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assert_equal(["<main>", nil, "<main>"], a)
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end
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spec 'return nil if stack frame not found' do
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a = eval('called_from', TOPLEVEL_BINDING)
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assert_nil(a)
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end
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end
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end
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