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require 'test/unit'
class TestScope < Test::Unit::TestCase
# $_ is a local variable but not be shared by threads.
def wakeup(t)
t.run
end
private :wakeup
def test_scope_uscore_string
sub = proc {|x| "#{x, $_ = $_, x; x}"}
assert_equal("", sub.call("first"))
assert_equal("first", sub.call("second"))
end
def test_scope_match_string
sub = proc {|x| "#{tmp = $&; /.*/ =~ x; tmp}"}
assert_equal("", sub.call("first"))
assert_equal("first", sub.call("second"))
end
def test_threadscope_uscore
# shares local scope
t = Thread.start do
$_ = "sub"
loop do
Thread.stop
assert_equal("sub", $_)
end
end
begin
$_ = "main"
# another thread may change?
t.run
assert_equal("main", $_)
ensure
t.kill
t.join
end
end
def test_threadscope_match
# shares local scope
t = Thread.start do
/.*/ =~ "sub"
loop do
Thread.stop
assert_equal("sub", $&)
end
end
begin
/.*/ =~ "main"
# another thread may change?
t.run
assert_equal("main", $&)
ensure
t.kill
t.join
end
end
def test_threadscope_uscore_sub
t = Thread.start do
$_ = "sub"
loop do
Thread.stop
assert_equal("sub", $_)
end
end
begin
$_ = "main"
# another thread waked in function may change?
wakeup(t)
assert_equal("main", $_)
ensure
t.kill
t.join
end
end
def test_threadscope_match_sub
t = Thread.start do
/.*/ =~ "sub"
loop do
Thread.stop
assert_equal("sub", $&)
end
end
begin
/.*/ =~ "main"
# another thread waked in function may change?
wakeup(t)
assert_equal("main", $&)
ensure
t.kill
t.join
end
end
def test_threadscope_uscore_main
t = Thread.new(Thread.current) do |main|
$_ = "sub"
loop do
assert_equal("sub", $_)
Thread.stop
wakeup(main)
end
end
begin
$_ = "main"
# another thread waked in function may change while this thread
# is absent this scope?
wakeup(t)
assert_equal("main", $_)
ensure
t.kill
t.join
end
end
def test_threadscope_match_main
t = Thread.new(Thread.current) do |main|
/.*/ =~ "sub"
loop do
assert_equal("sub", $&)
Thread.stop
wakeup(main)
end
end
begin
/.*/ =~ "main"
wakeup(t)
assert_equal("main", $&)
ensure
t.kill
t.join
end
end
def test_threadscope_uscore_proc
sub = nil
Thread.start do
$_ = "sub"
sub = proc {$_}
end.join
$_ = "main"
assert_equal("main", $_)
assert_equal("sub", sub.call)
assert_equal("main", $_)
end
def test_threadscope_match_proc
sub = nil
Thread.start do
/.*/ =~ "sub"
sub = proc {$&}
end.join
/.*/ =~ "main"
assert_equal("main", $&)
assert_equal("sub", sub.call)
assert_equal("main", $&)
end
def test_threadscope_local
sub = nil
Thread.start do
var = "sub"
sub = proc {var}
end.join
var = "main"
assert_equal("main", var)
assert_equal("sub", sub.call)
assert_equal("main", var)
end
def test_threadscope_shared
sub = nil
var = "main"
Thread.start do
sub = proc {
tmp, var = var, "sub"
tmp
}
end.join
assert_equal("main", sub.call)
assert_equal("sub", var)
end
end
|
