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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
module Specs
module Kernel
class HasNone
end
class HasOpEqual
def ==(other)
other.kind_of? HasOpEqual
end
end
class HasEqual
def equal?(other)
false
end
end
class HasOppoOpEqual
def ==(other)
false
end
def equal?(other)
false
end
end
end
end
describe "Kernel#=== for a class with default #== and #equal?" do
before :each do
@o1 = Specs::Kernel::HasNone.new
@o2 = @o1.dup
end
it "returns true if other object has same object id" do
@o1.object_id.should == @o1.object_id
(@o1 === @o1).should == true
end
it "returns false if other object does not have same object id" do
@o1.object_id.should_not == @o2.object_id
(@o1 === @o2).should == false
end
end
describe "Kernel#=== for a class with #== overridden to consider other object's class" do
before :each do
@o = Object.new
@o1 = Specs::Kernel::HasOpEqual.new
@o2 = @o1.dup
end
it "returns true if #== returns true even if #equal? is false" do
@o1.should_not equal(@o2)
(@o1 == @o2).should == true
(@o1 === @o2).should == true
end
it "returns true if #equal? returns true" do
@o1.should equal(@o1)
(@o1 === @o1).should == true
end
it "returns false if neither #== nor #equal? returns true" do
@o1.should_not equal(@o)
(@o1 == @o).should == false
(@o1 === @o).should == false
end
end
describe "Kernel#=== for a class with #equal? overridden to always be false" do
before :each do
@o = Object.new
@o1 = Specs::Kernel::HasEqual.new
@o2 = @o1.dup
end
it "returns true if #== returns true even if #equal? is false" do
@o1.should_not equal(@o1)
(@o1 == @o1).should == true
(@o1 === @o1).should == true
end
it "returns false if neither #== nor #equal? returns true" do
@o1.should_not equal(@o)
(@o1 == @o).should == false
(@o1 === @o).should == false
end
end
describe "Kernel#=== for a class with #== and #equal? overridden to always be false" do
before :each do
@o = Object.new
@o1 = Specs::Kernel::HasOppoOpEqual.new
@o2 = @o1.dup
end
it "returns true if the object id is the same even if both #== and #equal? return false" do
@o1.object_id.should == @o1.object_id
@o1.should_not equal(@o1)
(@o1 == @o1).should == false
(@o1 === @o1).should == true
end
it "returns false if the object id is not the same and both #== and #equal? return false" do
@o1.object_id.should_not == @o2.object_id
@o1.should_not equal(@o2)
(@o1 == @o2).should == false
(@o1 === @o2).should == false
end
end
describe "Kernel#=== does not call #object_id nor #equal?" do
before :each do
@o1 = Object.new
@o1.should_not_receive(:object_id)
@o1.should_not_receive(:equal?)
end
it "but still returns true for #== or #=== on the same object" do
(@o1 == @o1).should == true
(@o1 === @o1).should == true
end
end
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