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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Method#curry" do
it "returns a curried proc" do
x = Object.new
def x.foo(a,b,c); [a,b,c]; end
c = x.method(:foo).curry
c.should be_kind_of(Proc)
c.call(1).call(2, 3).should == [1,2,3]
end
describe "with optional arity argument" do
before(:each) do
@obj = MethodSpecs::Methods.new
end
it "returns a curried proc when given correct arity" do
@obj.method(:one_req).curry(1).should be_kind_of(Proc)
@obj.method(:zero_with_splat).curry(100).should be_kind_of(Proc)
@obj.method(:two_req_with_splat).curry(2).should be_kind_of(Proc)
end
it "raises ArgumentError when the method requires less arguments than the given arity" do
lambda { @obj.method(:zero).curry(1) }.should raise_error(ArgumentError)
lambda { @obj.method(:one_req_one_opt).curry(3) }.should raise_error(ArgumentError)
lambda { @obj.method(:two_req_one_opt_with_block).curry(4) }.should raise_error(ArgumentError)
end
it "raises ArgumentError when the method requires more arguments than the given arity" do
lambda { @obj.method(:two_req_with_splat).curry(1) }.should raise_error(ArgumentError)
lambda { @obj.method(:one_req).curry(0) }.should raise_error(ArgumentError)
end
end
end
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