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require 'test_helper'
class TestConstantSpying < Minitest::Test
class Foo
HELLO = "hello world"
def self.hello
HELLO
end
module Bar
def self.hello
HELLO
end
end
end
class ChildFoo < Foo
def self.hello
HELLO
end
end
def teardown
Spy::Agency.instance.dissolve!
end
def test_spy_on_constant
assert_equal "hello world", Foo.hello
spy = Spy.on_const(Foo, :HELLO)
assert_nil Foo.hello
spy.and_return("awesome")
assert_equal "awesome", Foo.hello
Spy.off_const(Foo, :HELLO)
assert_equal "hello world", Foo.hello
assert_equal "hello world", Foo::Bar.hello
spy = Spy.on_const(Foo, :HELLO)
assert_nil Foo::Bar.hello
spy.and_return("awesome")
assert_equal "awesome", Foo::Bar.hello
Spy.off_const(Foo, :HELLO)
assert_equal "hello world", Foo::Bar.hello
assert_equal "hello world", ChildFoo.hello
spy = Spy.on_const(Foo, :HELLO)
assert_nil ChildFoo.hello
spy.and_return("awesome")
assert_equal "awesome", ChildFoo.hello
Spy.off_const(Foo, :HELLO)
assert_equal "hello world", ChildFoo.hello
end
end
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