rspec / rspec-expectations / 634

89%

Pull #295

travis-ci

Support do..end style block with raise_error matcher

Currently raise_error matcher accepts only {..} style blocks,
because {..} blocks have higher precedence over do..end blocks.
This is a common pitfall.

expect { do_something }.to raise_error do |error|
  expect(error.some_value).to eq(1)
end

In this case, the do..end block is taken by the #to method
and the #raise_error gets no block.

This patch makes raise_error matcher to use the block passed
as an argument from #to if it did not take any block directly.

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