diff options
Diffstat (limited to 'vendor/bundle/ruby/3.4.0/gems/eventmachine-1.2.7/tests/test_futures.rb')
| -rw-r--r-- | vendor/bundle/ruby/3.4.0/gems/eventmachine-1.2.7/tests/test_futures.rb | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/vendor/bundle/ruby/3.4.0/gems/eventmachine-1.2.7/tests/test_futures.rb b/vendor/bundle/ruby/3.4.0/gems/eventmachine-1.2.7/tests/test_futures.rb new file mode 100644 index 0000000..b494856 --- /dev/null +++ b/vendor/bundle/ruby/3.4.0/gems/eventmachine-1.2.7/tests/test_futures.rb @@ -0,0 +1,170 @@ +require 'em_test_helper' + +class TestFutures < Test::Unit::TestCase + + def setup + end + + def teardown + end + + def test_future + assert_equal(100, EM::Deferrable.future(100) ) + + p1 = proc { 100 + 1 } + assert_equal(101, EM::Deferrable.future(p1) ) + end + + class MyFuture + include EM::Deferrable + def initialize *args + super + set_deferred_status :succeeded, 40 + end + end + + class MyErrorFuture + include EM::Deferrable + def initialize *args + super + set_deferred_status :failed, 41 + end + end + + + def test_future_1 + # Call future with one additional argument and it will be treated as a callback. + def my_future + MyFuture.new + end + + value = nil + EM::Deferrable.future my_future, proc {|v| value=v} + assert_equal( 40, value ) + end + + + def test_future_2 + # Call future with two additional arguments and they will be treated as a callback + # and an errback. + value = nil + EM::Deferrable.future MyErrorFuture.new, nil, proc {|v| value=v} + assert_equal( 41, value ) + end + + + def test_future_3 + # Call future with no additional arguments but with a block, and the block will be + # treated as a callback. + value = nil + EM::Deferrable.future MyFuture.new do |v| + value=v + end + assert_equal( 40, value ) + end + + + class RecursiveCallback + include EM::Deferrable + end + + # A Deferrable callback can call #set_deferred_status to change the values + # passed to subsequent callbacks. + # + def test_recursive_callbacks + n = 0 # counter assures that all the tests actually run. + rc = RecursiveCallback.new + rc.callback {|a| + assert_equal(100, a) + n += 1 + rc.set_deferred_status :succeeded, 101, 101 + } + rc.callback {|a,b| + assert_equal(101, a) + assert_equal(101, b) + n += 1 + rc.set_deferred_status :succeeded, 102, 102, 102 + } + rc.callback {|a,b,c| + assert_equal(102, a) + assert_equal(102, b) + assert_equal(102, c) + n += 1 + } + rc.set_deferred_status :succeeded, 100 + assert_equal(3, n) + end + + def test_syntactic_sugar + rc = RecursiveCallback.new + rc.set_deferred_success 100 + rc.set_deferred_failure 200 + end + + # It doesn't raise an error to set deferred status more than once. + # In fact, this is a desired and useful idiom when it happens INSIDE + # a callback or errback. + # However, it's less useful otherwise, and in fact would generally be + # indicative of a programming error. However, we would like to be resistant + # to such errors. So whenever we set deferred status, we also clear BOTH + # stacks of handlers. + # + def test_double_calls + s = 0 + e = 0 + + d = EM::DefaultDeferrable.new + d.callback {s += 1} + d.errback {e += 1} + + d.succeed # We expect the callback to be called, and the errback to be DISCARDED. + d.fail # Presumably an error. We expect the errback NOT to be called. + d.succeed # We expect the callback to have been discarded and NOT to be called again. + + assert_equal(1, s) + assert_equal(0, e) + end + + # Adding a callback to a Deferrable that is already in a success state executes the callback + # immediately. The same applies to a an errback added to an already-failed Deferrable. + # HOWEVER, we expect NOT to be able to add errbacks to succeeded Deferrables, or callbacks + # to failed ones. + # + # We illustrate this with a rather contrived test. The test calls #fail after #succeed, + # which ordinarily would not happen in a real program. + # + # What we're NOT attempting to specify is what happens if a Deferrable is succeeded and then + # failed (or vice-versa). Should we then be able to add callbacks/errbacks of the appropriate + # type for immediate execution? For now at least, the official answer is "don't do that." + # + def test_delayed_callbacks + s1 = 0 + s2 = 0 + e = 0 + + d = EM::DefaultDeferrable.new + d.callback {s1 += 1} + + d.succeed # Triggers and discards the callback. + + d.callback {s2 += 1} # This callback is executed immediately and discarded. + + d.errback {e += 1} # This errback should be DISCARDED and never execute. + d.fail # To prove it, fail and assert e is 0 + + assert_equal( [1,1], [s1,s2] ) + assert_equal( 0, e ) + end + + def test_timeout + n = 0 + EM.run { + d = EM::DefaultDeferrable.new + d.callback {n = 1; EM.stop} + d.errback {n = 2; EM.stop} + d.timeout(0.01) + } + assert_equal( 2, n ) + end + +end |