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Fix fork isolation specs to cover cases where no waitpid call can happen

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Markus Schirp 2014-12-08 23:04:59 +00:00
parent c25f51c02f
commit 2f3ae5a9ca
1 changed files with 14 additions and 3 deletions
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17
spec/unit/mutant/isolation_spec.rb
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@ -64,9 +64,7 @@ RSpec.describe Mutant::Isolation::Fork do
end
end
# Spec stubbing out the fork to ensure all lines are covered
# with expectations
it 'covers all lines' do
it 'uses primitives in correct order when fork succeeds' do
reader, writer = double('reader'), double('writer')
expect(IO).to receive(:pipe).ordered.and_return([reader, writer])
expect(reader).to receive(:binmode).and_return(reader).ordered
@ -85,5 +83,18 @@ RSpec.describe Mutant::Isolation::Fork do
expect(object.call { :foo }).to be(:foo)
end
it 'uses primitives in correct order when fork fails' do
reader, writer = double('reader'), double('writer')
expect(IO).to receive(:pipe).ordered.and_return([reader, writer])
expect(reader).to receive(:binmode).and_return(reader).ordered
expect(writer).to receive(:binmode).and_return(writer).ordered
expect(Process).to receive(:fork).ordered.and_return(nil)
expect(Process).to_not receive(:waitpid)
expect(writer).to receive(:close).ordered
expect(reader).to receive(:read).ordered.and_return(Marshal.dump(:foo))
expect(object.call).to be(:foo)
end
end
end