Class: AssertGenerator::Klass

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#numeric_precision ⇒ Object

Returns the value of attribute numeric_precision.



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# File 'lib/assert_generator.rb', line 32

def numeric_precision
  @numeric_precision
end

#relative_date_today ⇒ Object

Returns the value of attribute relative_date_today.



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# File 'lib/assert_generator.rb', line 32

def relative_date_today
  @relative_date_today
end

#relative_dates ⇒ Object

Returns the value of attribute relative_dates.



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# File 'lib/assert_generator.rb', line 32

def relative_dates
  @relative_dates
end

Instance Method Details

#drillable_object(v) ⇒ Object 



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# File 'lib/assert_generator.rb', line 142

def drillable_object(v)
  v.is_a?(Enumerable) || v.respond_to?(:attributes)
end

#generate_assert_drillable_item(v, make_accessor, *accessor_params) ⇒ Object 



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# File 'lib/assert_generator.rb', line 113

def generate_assert_drillable_item(v, make_accessor, *accessor_params)
  accessor = make_accessor.call(*accessor_params)

  if drillable_object(v)
    return generate_asserts(v, accessor, relative_dates, numeric_precision, nil)
  end

  if v.nil?
    out "assert_nil #{accessor}"
  elsif v.is_a?(true.class)
    out "assert #{accessor}"
  elsif v.is_a?(false.class)
    out "refute #{accessor}"

  elsif is_timey?(v)
    generate_date_time_assert(v, accessor)
  elsif v.is_a?(Date)
    generate_date_assert(v, accessor)
  elsif v.is_a?(Float) || v.is_a?(BigDecimal)
    generate_numeric_assert(v, accessor)
  else
    out "assert_equal #{v.inspect}, #{make_accessor.call(*accessor_params)}"
  end
end

#generate_asserts(source, source_expr, relative_dates, numeric_precision, block) ⇒ Object 



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# File 'lib/assert_generator.rb', line 34

def generate_asserts(source, source_expr, relative_dates, numeric_precision, block)
  if block
    unless !defined?(Rails) || Rails.env.test?
      raise 'AssertGenerator must only be used in the test context'
    end

    source_expr = block.call.to_s
    # rubocop:disable Security/Eval
    source ||= eval(source_expr, block.binding)
    # rubocop:enable Security/Eval
  end

  unless source_expr
    raise 'generate_asserts wants a source expression or a block'
  end

  if relative_dates
    self.relative_dates = relative_dates
    # rubocop:disable Security/Eval
    self.relative_date_today = eval(relative_dates, block&.binding ||  binding.of_caller(1))
    # rubocop:enable Security/Eval
  end

  self.numeric_precision = numeric_precision

  if source.is_a?(Hash)
    generate_asserts_hash(source, source_expr)
    return self
  end

  if source.respond_to?(:attributes)
    # AR or something that quacks like it
    generate_asserts_attributes(source, source_expr)
    return self
  end

  if source.is_a?(Range)
    generate_asserts_range(source, source_expr)
    return self
  end

  if source.is_a?(Enumerable)
    generate_asserts_enum(source, source_expr)
    return self
  end

  generate_assert_drillable_item(source, ->(_c) { source_expr }, source)
  self
end

#generate_asserts_attributes(h, p) ⇒ Object

Active Record, or anything else with an attributes hash



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# File 'lib/assert_generator.rb', line 85

def generate_asserts_attributes(h, p)
  h.attributes.each do |k, v|
    generate_assert_drillable_item(v, ->(meth) { "#{p}.#{meth}" }, k)
  end
end

#generate_asserts_enum(a, p) ⇒ Object 



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# File 'lib/assert_generator.rb', line 100

def generate_asserts_enum(a, p)
  generate_assert_drillable_item(a.count, ->(_c) { "#{p}.count" }, p)

  a.each_with_index do |v, idx|
    generate_assert_drillable_item(v, ->(index) { "#{p}[#{index}]" }, idx)
  end
end

#generate_asserts_hash(h, p) ⇒ Object 



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# File 'lib/assert_generator.rb', line 91

def generate_asserts_hash(h, p)
  h.each do |k, v|
    generate_assert_drillable_item(v, ->(key) do
      key_literal = key.is_a?(Symbol) ? ":#{key}" : "'#{key}'"
      "#{p}[#{key_literal}]"
    end, k)
  end
end

#generate_asserts_range(a, p) ⇒ Object 



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# File 'lib/assert_generator.rb', line 108

def generate_asserts_range(a, p)
  generate_assert_drillable_item(a.first, ->(_x) { "#{p}.first" }, p)
  generate_assert_drillable_item(a.last, ->(_x) { "#{p}.last" }, p)
end

#generate_date_assert(v, accessor) ⇒ Object 



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# File 'lib/assert_generator.rb', line 146

def generate_date_assert(v, accessor)
  if relative_dates
    date_diff = v - relative_date_today
    if date_diff.to_i == 0
      out "assert_equal #{relative_dates}, #{accessor}"
    else
      out "assert_equal #{relative_dates} #{date_diff.to_i < 0 ? '-' : '+'} #{date_diff.to_i.abs}.days, #{accessor}"
    end
  else
    out "assert_equal Date.new(#{v.year}, #{v.month}, #{v.day}), #{accessor}"
  end
end

#generate_date_time_assert(v, accessor) ⇒ Object 



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# File 'lib/assert_generator.rb', line 159

def generate_date_time_assert(v, accessor)
  out "assert_equal DateTime.new(#{v.year}, #{v.month}, #{v.day}, " \
         + "#{v.hour}, #{v.min}, #{v.sec}, '#{v.zone}'), #{accessor}"
end

#generate_numeric_assert(v, accessor) ⇒ Object 



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# File 'lib/assert_generator.rb', line 164

def generate_numeric_assert(v, accessor)
  if numeric_precision
    delta = 10.0 ** -numeric_precision
    assert_code = "assert_in_delta #{v.to_f.round(numeric_precision)}, #{accessor}, #{delta}"
  else
    assert_code = "assert_equal #{v}, #{accessor}"
  end

  out assert_code
end

#out(s) ⇒ Object 



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# File 'lib/assert_generator.rb', line 138

def out(s)
  puts(s)
end