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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Comparable#==" do
before(:each) do
@a = ComparableSpecs::Weird.new(0)
@b = ComparableSpecs::Weird.new(10)
end
it "returns true if other is the same as self" do
(@a == @a).should be_true
(@b == @b).should be_true
end
it "calls #<=> on self with other and returns true if #<=> returns 0" do
@a.should_receive(:<=>).any_number_of_times.and_return(0)
(@a == @b).should be_true
end
it "calls #<=> on self with other and returns true if #<=> returns 0.0" do
@a.should_receive(:<=>).any_number_of_times.and_return(0.0)
(@a == @b).should be_true
end
it "returns false if calling #<=> on self returns a positive Integer" do
@a.should_receive(:<=>).any_number_of_times.and_return(1)
(@a == @b).should be_false
end
it "returns false if calling #<=> on self returns a negative Integer" do
@a.should_receive(:<=>).any_number_of_times.and_return(-1)
(@a == @b).should be_false
end
ruby_version_is ""..."1.9" do
it "returns nil if calling #<=> on self returns nil" do
@a.should_receive(:<=>).any_number_of_times.and_return(nil)
(@a == @b).should be_nil
end
it "returns nil if calling #<=> on self returns a non-Integer" do
@a.should_receive(:<=>).any_number_of_times.and_return("abc")
(@a == @b).should be_nil
end
end
ruby_version_is "1.9" do
it "returns false if calling #<=> on self returns nil" do
@a.should_receive(:<=>).any_number_of_times.and_return(nil)
(@a == @b).should be_false
end
it "returns false if calling #<=> on self returns a non-Integer" do
@a.should_receive(:<=>).any_number_of_times.and_return("abc")
(@a == @b).should be_false
end
end
describe "when calling #<=> on self raises an Exception" do
before(:all) do
@raise_standard_error = @a.dup
def @raise_standard_error.<=>(b) raise StandardError, "test"; end
@raise_sub_standard_error = @a.dup
def @raise_sub_standard_error.<=>(b) raise TypeError, "test"; end
@not_standard_error = SyntaxError
@raise_not_standard_error = @a.dup
def @raise_not_standard_error.<=>(b) raise SyntaxError, "test"; end
end
it "raises the error if #<=> raises an Exception that excluding StandardError" do
lambda { @raise_not_standard_error == @b }.should raise_error(@not_standard_error)
end
ruby_version_is ""..."1.9" do
it "returns nil if #<=> raises a StandardError" do
(@raise_standard_error == @b).should be_nil
(@raise_sub_standard_error == @b).should be_nil
end
end
ruby_version_is "1.9" do
# Behaviour confirmed by MRI test suite
it "returns false if #<=> raises a StandardError" do
(@raise_standard_error == @b).should be_false
(@raise_sub_standard_error == @b).should be_false
end
end
end
end
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