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Diffstat (limited to 'spec/ruby/core/integer/try_convert_spec.rb')
-rw-r--r-- | spec/ruby/core/integer/try_convert_spec.rb | 50 |
1 files changed, 50 insertions, 0 deletions
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..4bc7d3851a --- /dev/null +++ b/spec/ruby/core/integer/try_convert_spec.rb @@ -0,0 +1,50 @@ +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, "can't convert MockObject to Integer (MockObject#to_int gives Object)") + end + + it "responds with a different error message when it raises a TypeError, depending on the type of the non-Integer object :to_int returns" do + obj = mock("to_int") + obj.should_receive(:to_int).and_return("A String") + -> { + Integer.try_convert obj + }.should raise_error(TypeError, "can't convert MockObject to Integer (MockObject#to_int gives String)") + 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 |