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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Hash.try_convert" do
it "returns the argument if it's a Hash" do
x = Hash.new
Hash.try_convert(x).should equal(x)
end
it "returns the argument if it's a kind of Hash" do
x = HashSpecs::MyHash.new
Hash.try_convert(x).should equal(x)
end
it "returns nil when the argument does not respond to #to_hash" do
Hash.try_convert(Object.new).should be_nil
end
it "sends #to_hash to the argument and returns the result if it's nil" do
obj = mock("to_hash")
obj.should_receive(:to_hash).and_return(nil)
Hash.try_convert(obj).should be_nil
end
it "sends #to_hash to the argument and returns the result if it's a Hash" do
x = Hash.new
obj = mock("to_hash")
obj.should_receive(:to_hash).and_return(x)
Hash.try_convert(obj).should equal(x)
end
it "sends #to_hash to the argument and returns the result if it's a kind of Hash" do
x = HashSpecs::MyHash.new
obj = mock("to_hash")
obj.should_receive(:to_hash).and_return(x)
Hash.try_convert(obj).should equal(x)
end
it "sends #to_hash to the argument and raises TypeError if it's not a kind of Hash" do
obj = mock("to_hash")
obj.should_receive(:to_hash).and_return(Object.new)
-> { Hash.try_convert obj }.should raise_error(TypeError, "can't convert MockObject to Hash (MockObject#to_hash gives Object)")
end
it "does not rescue exceptions raised by #to_hash" do
obj = mock("to_hash")
obj.should_receive(:to_hash).and_raise(RuntimeError)
-> { Hash.try_convert obj }.should raise_error(RuntimeError)
end
end
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