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# frozen_string_literal: false
require 'test/unit'
class TestTrace < Test::Unit::TestCase
def test_trace
$x = 1234
$y = 0
trace_var :$x, proc{$y = $x}
$x = 40414
assert_equal($x, $y)
untrace_var :$x
$x = 19660208
assert_not_equal($x, $y)
trace_var :$x, proc{$x *= 2}
$x = 5
assert_equal(10, $x)
untrace_var :$x
end
def test_trace_proc_that_raises_exception
$x = 1234
trace_var :$x, proc { raise }
assert_raise(RuntimeError) { $x = 42 }
ensure
untrace_var :$x
end
def test_trace_string
$x = 1234
trace_var :$x, "$y = :bar"
$x = 42
assert_equal(:bar, $y)
ensure
untrace_var :$x
end
def test_trace_break
bug2722 = '[ruby-core:31783]'
a = Object.new.extend(Enumerable)
def a.each
yield
end
assert(Thread.start {
Thread.current.add_trace_func(proc{})
a.any? {true}
}.value, bug2722)
end
end
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