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|
# frozen_string_literal: true
require_relative 'test_helper'
# FakeFS safe test class
class SafeTest < Minitest::Test
def teardown
FakeFS.deactivate!
FakeFS::FileSystem.clear
end
def test_FakeFS_activated_is_accurate
2.times do
FakeFS.deactivate!
refute FakeFS.activated?
FakeFS.activate!
assert FakeFS.activated?
end
end
def test_FakeFS_method_does_not_intrude_on_global_namespace
path = 'file.txt'
FakeFS do
File.open(path, 'w') { |f| f.write 'Yatta!' }
assert File.exist?(path)
end
refute File.exist?(path)
end
def test_FakeFS_method_presents_persistent_fs
path = 'file.txt'
FakeFS do
File.open(path, 'w') { |f| f.write 'Yatta!' }
assert File.exist?(path)
end
refute File.exist?(path)
FakeFS do
assert File.exist?(path)
end
end
def test_FakeFS_fresh_method_presents_fresh_fs
path = 'file.txt'
FakeFS do
File.open(path, 'w') { |f| f.write 'Yatta!' }
assert File.exist?(path)
end
refute File.exist?(path)
FakeFS.with_fresh do
refute File.exist?(path)
end
end
def test_FakeFS_clear_method_clears_fs
path = 'file.txt'
FakeFS do
File.open(path, 'w') { |f| f.write 'Yatta!' }
assert File.exist?(path)
end
refute File.exist?(path)
FakeFS.clear!
FakeFS do
refute File.exist?(path)
end
end
def test_FakeFS_method_returns_value_of_yield
result = FakeFS do
File.open('myfile.txt', 'w') { |f| f.write 'Yatta!' }
File.read('myfile.txt')
end
assert_equal result, 'Yatta!'
end
def test_FakeFS_method_does_not_deactivate_FakeFS_if_already_activated
FakeFS.activate!
FakeFS {}
assert FakeFS.activated?
end
def test_FakeFS_method_can_be_nested
FakeFS do
assert FakeFS.activated?
FakeFS do
assert FakeFS.activated?
end
assert FakeFS.activated?
end
refute FakeFS.activated?
end
def test_FakeFS_method_can_be_nested_with_FakeFS_without
FakeFS do
assert FakeFS.activated?
FakeFS.without do
refute FakeFS.activated?
end
assert FakeFS.activated?
end
refute FakeFS.activated?
end
def test_FakeFS_method_deactivates_FakeFS_when_block_raises_exception
begin
FakeFS do
raise 'boom!'
end
rescue StandardError
'Nothing to do'
end
refute FakeFS.activated?
end
def test_FakeFS_activate_method_stubs_File_class_but_not_IO
old_file = ::File
old_io = ::IO
::FakeFS.activate!
refute_equal old_file, ::File
assert_equal old_io, ::IO
ensure
::FakeFS.deactivate!
end
def test_FakeFS_activate_method_stubs_IO_class_if_explicity_asked
old_file = ::File
old_io = ::IO
::FakeFS.activate!(io_mocks: true)
refute_equal old_file, ::File
refute_equal old_io, ::IO
ensure
::FakeFS.deactivate!
end
def test_FakeFS_deactivate_restore_original_File_and_IO_classes
old_file = ::File
old_io = ::IO
::FakeFS.activate!(io_mocks: true)
::FakeFS.deactivate!
assert_equal old_file, ::File
assert_equal old_io, ::IO
ensure
::FakeFS.deactivate!
end
end
|
