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# frozen_string_literal: true
require 'test/unit'
class TestFiberStorage < Test::Unit::TestCase
def test_storage
Fiber.new do
Fiber[:x] = 10
assert_kind_of Hash, Fiber.current.storage
assert_predicate Fiber.current.storage, :any?
end.resume
end
def test_storage_inherited
Fiber.new do
Fiber[:foo] = :bar
Fiber.new do
assert_equal :bar, Fiber[:foo]
Fiber[:bar] = :baz
end.resume
assert_nil Fiber[:bar]
end.resume
end
def test_variable_assignment
Fiber.new do
Fiber[:foo] = :bar
assert_equal :bar, Fiber[:foo]
end.resume
end
def test_storage_assignment
old, Warning[:experimental] = Warning[:experimental], false
Fiber.new do
Fiber.current.storage = {foo: :bar}
assert_equal :bar, Fiber[:foo]
end.resume
ensure
Warning[:experimental] = old
end
def test_storage_only_allow_access_from_same_fiber
old, Warning[:experimental] = Warning[:experimental], false
f = Fiber.new do
Fiber[:a] = 1
end
assert_raise(ArgumentError) { f.storage }
assert_raise(ArgumentError) { f.storage = {} }
ensure
Warning[:experimental] = old
end
def test_inherited_storage
Fiber.new(storage: {foo: :bar}) do
f = Fiber.new do
assert_equal :bar, Fiber[:foo]
end
f.resume
end.resume
end
def test_enumerator_inherited_storage
Fiber.new do
Fiber[:item] = "Hello World"
enumerator = Enumerator.new do |out|
out << Fiber.current
out << Fiber[:item]
end
# The fiber within the enumerator is not equal to the current...
assert_not_equal Fiber.current, enumerator.next
# But it inherited the storage from the current fiber:
assert_equal "Hello World", enumerator.next
end.resume
end
def test_thread_inherited_storage
Fiber.new do
Fiber[:x] = 10
x = Thread.new do
Fiber[:y] = 20
Fiber[:x]
end.value
assert_equal 10, x
assert_equal nil, Fiber[:y]
end.resume
end
def test_enumerator_count
Fiber.new do
Fiber[:count] = 0
enumerator = Enumerator.new do |y|
Fiber[:count] += 1
y << Fiber[:count]
end
assert_equal 1, enumerator.next
assert_equal 0, Fiber[:count]
end.resume
end
def test_storage_assignment_type_error
assert_raise(TypeError) do
Fiber.new(storage: {Object.new => "bar"}) {}
end
end
end
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