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require 'spec_helper'
require 'mspec/expectations/expectations'
require 'mspec/matchers'
class Parent; end
class Child < Parent; end
describe BeAncestorOfMatcher do
it "matches when actual is an ancestor of expected" do
BeAncestorOfMatcher.new(Child).matches?(Parent).should == true
end
it "does not match when actual is not an ancestor of expected" do
BeAncestorOfMatcher.new(Parent).matches?(Child).should == false
end
it "provides a useful failure message" do
matcher = BeAncestorOfMatcher.new(Parent)
matcher.matches?(Child)
matcher.failure_message.should == ["Expected Child", "to be an ancestor of Parent"]
end
it "provides a useful negative failure message" do
matcher = BeAncestorOfMatcher.new(Child)
matcher.matches?(Parent)
matcher.negative_failure_message.should == ["Expected Parent", "not to be an ancestor of Child"]
end
end
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