Class: Yadriggy::Assert::Reason

Inherits:
Object
  • Object
show all
Defined in:
lib/yadriggy/assert.rb

Overview

Reason that an assertion fails.

Instance Method Summary collapse

Instance Method Details

#ast ⇒ ASTnode

Gets the AST of the block given to #assertion.

Returns:

  • (ASTnode) —

    an abstract syntax tree.



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# File 'lib/yadriggy/assert.rb', line 63

def ast() @ast end

#results ⇒ Hash<ASTnode,Pair<String,Object>>

Gets the detailed results.

Returns:

  • (Hash<ASTnode,Pair<String,Object>>) —

    a map from sub-expressions to their source and resulting vales. The sub-expressions are Yadriggy::ASTnode objects.



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# File 'lib/yadriggy/assert.rb', line 69

def results() @results end

#setup(ast, results) ⇒ Object 



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# File 'lib/yadriggy/assert.rb', line 56

def setup(ast, results)
  @ast = ast
  @results = results
end

#show ⇒ Array<String>

Gets the text showing the values of the sub-expressions.

Returns:

  • (Array<String>) —

    an array of lines.



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# File 'lib/yadriggy/assert.rb', line 73

def show
  output = []
  header = show2(@ast, '', output)
  output << header
  src, value = @results[ast]
  if src.nil?
    pp = PrettyPrinter.new(Printer.new(2))
    pp.print(ast)
    output << pp.printer.output
  else
    output << src
  end
  output.reverse!
end

#show2(ast, header, output) ⇒ String

Returns the new header.

Returns:

  • (String) —

    the new header.



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# File 'lib/yadriggy/assert.rb', line 90

def show2(ast, header, output)
  if ast.is_a?(Paren)
    show2(ast.expression, header + ' ', output) + ' '
  elsif ast.is_a?(Call) && ast.block_arg.nil? && ast.block.nil?
    header2 = show2(ast.receiver, header, output)
    src2, value2 = @results[ast.receiver]
    src, value = @results[ast]
    if src.nil?
      src = PrettyPrinter.ast_to_s(ast)
      if src2.nil?
        "#{header}#{' ' * src.size}"
      else
        "#{header2}#{' ' * (src.size - src2.size)}"
      end
    else
      output << "#{header2} #{str_rep(value)}"
      "#{header2} |#{' ' * (src.size - src2.size - 2)}"
    end
  elsif ast.is_a?(Binary)
    header = show2(ast.left, header, output)
    src, value = @results[ast]
    if src.nil?
      header = header + '   '
    else
      output << "#{header} #{str_rep(value)}"
      header = "#{header} | #{' ' * (ast.op.to_s.size - 1)}"
    end
    show2(ast.right, header, output)
  elsif ast.is_a?(Unary)
    src, value = @results[ast]
    if src.nil?
      header = header + ' '
    else
      output << "#{header}#{str_rep(value)}"
      header = "#{header}|"
    end
    show2(ast.operand, header, output)
  else
    src, value = @results[ast]
    if src.nil?
      src = PrettyPrinter.ast_to_s(ast)
      return "#{header}#{' ' * src.size}"
    else
      output << header + str_rep(value)
      "#{header}|#{' ' * (src.size - 1)}"
    end
  end
end

#str_rep(v) ⇒ Object

Obtains the text representation of the given value.



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# File 'lib/yadriggy/assert.rb', line 141

def str_rep(v)
  max = 70
  str = v.inspect
  if str.length < max
    str
  else
    str[0, max] + '...'
  end
end