Class: Must::Differ

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(a, b, path) ⇒ Differ

Returns a new instance of Differ.



5
6
7
 
# File 'lib/must/differ.rb', line 5

def initialize(a, b, path)
  @a, @b, @path = a, b, path
end

Instance Attribute Details

#a ⇒ Object (readonly)

Returns the value of attribute a.



3
4
5
 
# File 'lib/must/differ.rb', line 3

def a
  @a
end

#b ⇒ Object (readonly)

Returns the value of attribute b.



3
4
5
 
# File 'lib/must/differ.rb', line 3

def b
  @b
end

#path ⇒ Object (readonly)

Returns the value of attribute path.



3
4
5
 
# File 'lib/must/differ.rb', line 3

def path
  @path
end

Instance Method Details

#eq_float?(a, b) ⇒ Boolean

Returns:

  • (Boolean) 


9
10
11
 
# File 'lib/must/differ.rb', line 9

def eq_float?(a, b)
  (a - b).abs <= 0.0000001
end

#eq_object?(a, b) ⇒ Boolean

Returns:

  • (Boolean) 


13
14
15
 
# File 'lib/must/differ.rb', line 13

def eq_object?(a, b)
  a == b
end

#execute ⇒ Object 



61
62
63
64
65
66
 
# File 'lib/must/differ.rb', line 61

def execute
  execute!
  return true
rescue Must::Invalid
  return false
end

#execute! ⇒ Object 



17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
 
# File 'lib/must/differ.rb', line 17

def execute!
  unless a.class == b.class
    failed ClassMismatch, "%s expected [%s], but got [%s]" % [path, a.class, b.class]
  end

  if a.is_a?(Array)
    max = [a.size, b.size].max
    max.times do |i|
      Differ.new(a[i], b[i], "#{path}[#{i}]").execute!
    end
    return true
  end

  if a.is_a?(Hash)
    (a.keys | b.keys).each do |key|
      Differ.new(a[key], b[key], "#{path}[#{key}]").execute!
    end
    return true
  end

  eq = 
    case a
    when Float; eq_float?(a, b)
    else      ; eq_object?(a, b)
    end

  unless eq
    av = a.inspect.split(//)[0..50].join
    bv = b.inspect.split(//)[0..50].join
    failed ValueMismatch, "%s expected %s(%s), but got %s(%s)" % [path, av, a.class, bv, a.class]
  end

  return true

rescue Must::ClassMismatch => err
  if a.class == b.class
    as = Must::StructInfo.new(a).inspect
    bs = Must::StructInfo.new(b).inspect
    raise Must::StructMismatch, "%s expected %s, but got %s" % [path, as, bs]
  else
    raise
  end
end

#failed(klass, msg) ⇒ Object

Raises:

  • (klass) 


68
69
70
 
# File 'lib/must/differ.rb', line 68

def failed(klass, msg)
  raise klass, msg
end