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thoughtbot--shoulda-matchers/spec/support/capture_helpers.rb
Elliot Winkler 5b44edf8b3 Handle ensure_inclusion_of for boolean columns
Currently, using `ensure_inclusion_of` against a boolean column doesn't
work. We can assert that the column allows boolean values, but what
about values that should be rejected? Well, it depends on what you give
to `ensure_inclusion_of`. Here's how it works now:

* `ensure_inclusion_of(:attr).in_array([true])` asserts that false is
  rejected
* `ensure_inclusion_of(:attr).in_array([false])` asserts that true is
  rejected
* `ensure_inclusion_of(:attr).in_array([true, false])` does not assert
  that anything is rejected, instead informing the developer how
  this sort of expectation is not fully testable (anything other than
  true, false, or nil will be converted to false).
* `ensure_inclusion_of(:attr).in_array([nil])`, when the column is
  nullable, does not assert that anything is rejected, either, also
  printing a warning
* `ensure_inclusion_of(:attr).in_array([nil])`, when the column is
  non-nullable, raises an error because this expectation is not testable
  in any way, as setting a boolean column to nil this way will get
  converted to false.
2014-02-17 15:40:18 -07:00

19 lines
425 B
Ruby

module Kernel
unless method_defined?(:capture)
def capture(stream)
stream = stream.to_s
captured_stream = Tempfile.new(stream)
stream_io = eval("$#{stream}")
origin_stream = stream_io.dup
stream_io.reopen(captured_stream)
yield
stream_io.rewind
return captured_stream.read
ensure
captured_stream.unlink
stream_io.reopen(origin_stream)
end
end
end