Module: MiniTest::Assertions

Defined in:
lib/nandoc/extlib/minitest.rb

Instance Method Summary collapse

Instance Method Details

#assert_no_diff(exp, act, msg = nil, opts = {}) ⇒ Object

Fails unless exp == act. On failure use diff to show the diff, if exp and act are of the same class and



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# File 'lib/nandoc/extlib/minitest.rb', line 13

def assert_no_diff exp, act, msg=nil, opts={}
  if opts.kind_of?(String)
    opts = {:sep=>opts}
  end
  opts = {:sep=>"\n"}.merge(opts)
  msg = message(msg) do
    exp_kind, act_kind = [exp,act].map do |x|
      [String, Array].detect{|c| x.kind_of?(c)}
    end
    if exp_kind != act_kind
      "Expecting #{exp_kind.inspect} had #{act_kind.inspect}"
    elsif exp_kind.nil?
      "Will only do diff for strings and arrays, not #{exp.class}"
    else
      differ = DiffToString.gitlike!
      if exp_kind == String
        use_exp = exp.split(opts[:sep], -1)
        use_act = act.split(opts[:sep], -1)
      else
        use_exp = exp
        use_act = act
      end
      diff = Diff::LCS.diff(use_exp, use_act)
      if diff.empty?
        fail("test test fail -- never expecting empty diff here")
      else
        differ.arr1 = use_exp
        differ.arr2 = use_act # awful
        differ.diff_to_str(diff, :context=>3)
      end
    end
  end
  if re = opts[:ignoring]
    exp, act = [exp, act].map do |str|
      str.kind_of?(String) ? str.gsub(re, re.source) : str
    end
  end
  assert(exp == act, msg)
end