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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
require File.expand_path('../shared/join', __FILE__)
describe "Array#join" do
it_behaves_like :array_join_with_string_separator, :join
it_behaves_like :array_join_with_default_separator, :join
it "does not separate elements when the passed separator is nil" do
[1, 2, 3].join(nil).should == '123'
end
it "calls #to_str to convert the separator to a String" do
sep = mock("separator")
sep.should_receive(:to_str).and_return(", ")
[1, 2].join(sep).should == "1, 2"
end
it "does not call #to_str on the separator if the array is empty" do
sep = mock("separator")
sep.should_not_receive(:to_str)
[].join(sep).should == ""
end
it "raises a TypeError if the separator cannot be coerced to a String by calling #to_str" do
obj = mock("not a string")
lambda { [1, 2].join(obj) }.should raise_error(TypeError)
end
it "raises a TypeError if passed false as the separator" do
lambda { [1, 2].join(false) }.should raise_error(TypeError)
end
end
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