# File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 19
19:         def initialize attachment_name
20:           @attachment_name = attachment_name
21:           @low, @high = 0, (1.0/0)
22:         end

    # File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 53
53:         def description
54:           "validate the size of attachment #{@attachment_name}"
55:         end

    # File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 45
45:         def failure_message
46:           "Attachment #{@attachment_name} must be between #{@low} and #{@high} bytes"
47:         end

    # File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 29
29:         def greater_than size
30:           @low = size
31:           self
32:         end

    # File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 34
34:         def in range
35:           @low, @high = range.first, range.last
36:           self
37:         end

    # File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 24
24:         def less_than size
25:           @high = size
26:           self
27:         end

    # File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 39
39:         def matches? subject
40:           @subject = subject
41:           @subject = @subject.class unless Class === @subject
42:           lower_than_low? && higher_than_low? && lower_than_high? && higher_than_high?
43:         end

    # File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 49
49:         def negative_failure_message
50:           "Attachment #{@attachment_name} cannot be between #{@low} and #{@high} bytes"
51:         end

    # File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 88
88:         def higher_than_high?
89:           return true if @high == (1.0/0)
90:           not passes_validation_with_size(@high + 1)
91:         end

    # File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 79
79:         def higher_than_low?
80:           passes_validation_with_size(@low + 1)
81:         end

    # File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 83
83:         def lower_than_high?
84:           return true if @high == (1.0/0)
85:           passes_validation_with_size(@high - 1)
86:         end

    # File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 75
75:         def lower_than_low?
76:           not passes_validation_with_size(@low - 1)
77:         end

    # File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 59
59:         def override_method object, method, &replacement
60:           (class << object; self; end).class_eval do
61:             define_method(method, &replacement)
62:           end
63:         end

    # File lib/paperclip/matchers/validate_attachment_size_matcher.rb, line 65
65:         def passes_validation_with_size(new_size)
66:           file = StringIO.new(".")
67:           override_method(file, :size){ new_size }
68:           override_method(file, :to_tempfile){ file }
69: 
70:           (subject = @subject.new).send(@attachment_name).assign(file)
71:           subject.valid?
72:           subject.errors["#{@attachment_name}_file_size""#{@attachment_name}_file_size"].blank?
73:         end