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# frozen_string_literal: true
module FailureSafetyBehavior
def test_fetch_read_failure_returns_nil
@cache.write("foo", "bar")
emulating_unavailability do |cache|
assert_nil cache.fetch("foo")
end
end
def test_fetch_read_failure_does_not_attempt_to_write
end
def test_read_failure_returns_nil
@cache.write("foo", "bar")
emulating_unavailability do |cache|
assert_nil cache.read("foo")
end
end
def test_read_multi_failure_returns_empty_hash
@cache.write_multi("foo" => "bar", "baz" => "quux")
emulating_unavailability do |cache|
assert_equal Hash.new, cache.read_multi("foo", "baz")
end
end
def test_write_failure_returns_false
emulating_unavailability do |cache|
assert_equal false, cache.write("foo", "bar")
end
end
def test_write_multi_failure_not_raises
emulating_unavailability do |cache|
assert_nothing_raised do
cache.write_multi("foo" => "bar", "baz" => "quux")
end
end
end
def test_fetch_multi_failure_returns_fallback_results
@cache.write_multi("foo" => "bar", "baz" => "quux")
emulating_unavailability do |cache|
fetched = cache.fetch_multi("foo", "baz") { |k| "unavailable" }
assert_equal Hash["foo" => "unavailable", "baz" => "unavailable"], fetched
end
end
def test_delete_failure_returns_false
@cache.write("foo", "bar")
emulating_unavailability do |cache|
assert_equal false, cache.delete("foo")
end
end
def test_exist_failure_returns_false
@cache.write("foo", "bar")
emulating_unavailability do |cache|
assert_not cache.exist?("foo")
end
end
def test_increment_failure_returns_nil
@cache.write("foo", 1, raw: true)
emulating_unavailability do |cache|
assert_nil cache.increment("foo")
end
end
def test_decrement_failure_returns_nil
@cache.write("foo", 1, raw: true)
emulating_unavailability do |cache|
assert_nil cache.decrement("foo")
end
end
def test_clear_failure_returns_nil
emulating_unavailability do |cache|
assert_nil cache.clear
end
end
end
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