From 301d194ee3b49e6b078eccb999dd538e9bfa8c7c Mon Sep 17 00:00:00 2001 From: Nobuyoshi Nakada Date: Sun, 7 Oct 2018 13:02:46 +0900 Subject: Add Integer.try_convert [Feature #15211] --- spec/ruby/core/integer/try_convert_spec.rb | 40 ++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 spec/ruby/core/integer/try_convert_spec.rb (limited to 'spec/ruby/core/integer/try_convert_spec.rb') diff --git a/spec/ruby/core/integer/try_convert_spec.rb b/spec/ruby/core/integer/try_convert_spec.rb new file mode 100644 index 0000000000..45c66eec79 --- /dev/null +++ b/spec/ruby/core/integer/try_convert_spec.rb @@ -0,0 +1,40 @@ +require_relative '../../spec_helper' +require_relative 'fixtures/classes' + +ruby_version_is "3.1" do + describe "Integer.try_convert" do + it "returns the argument if it's an Integer" do + x = 42 + Integer.try_convert(x).should equal(x) + end + + it "returns nil when the argument does not respond to #to_int" do + Integer.try_convert(Object.new).should be_nil + end + + it "sends #to_int to the argument and returns the result if it's nil" do + obj = mock("to_int") + obj.should_receive(:to_int).and_return(nil) + Integer.try_convert(obj).should be_nil + end + + it "sends #to_int to the argument and returns the result if it's an Integer" do + x = 234 + obj = mock("to_int") + obj.should_receive(:to_int).and_return(x) + Integer.try_convert(obj).should equal(x) + end + + it "sends #to_int to the argument and raises TypeError if it's not a kind of Integer" do + obj = mock("to_int") + obj.should_receive(:to_int).and_return(Object.new) + -> { Integer.try_convert obj }.should raise_error(TypeError) + end + + it "does not rescue exceptions raised by #to_int" do + obj = mock("to_int") + obj.should_receive(:to_int).and_raise(RuntimeError) + -> { Integer.try_convert obj }.should raise_error(RuntimeError) + end + end +end -- cgit v1.2.3