Class: JsonSchema::Faker::Strategy::Simple

Inherits:
Object
  • Object
show all
Includes:
Util
Defined in:
lib/json_schema/faker/strategy/simple.rb

Direct Known Subclasses

Greedy

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Util

#compare_schema, #take_logical_and_of_schema, #take_unique_items

Class Method Details

.formats ⇒ Object 



8
9
10
 
# File 'lib/json_schema/faker/strategy/simple.rb', line 8

def formats
  @formats ||= {}
end

Instance Method Details

#call(schema, hint: nil, position:) ⇒ Object Also known as: generate 



13
14
15
16
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
 
# File 'lib/json_schema/faker/strategy/simple.rb', line 13

def call(schema, hint: nil, position:)
  if ::JsonSchema::Faker::Configuration.logger
    ::JsonSchema::Faker::Configuration.logger.debug "current position: #{position}"
    ::JsonSchema::Faker::Configuration.logger.debug "current hint:     #{hint.inspect}"
  end

  raise "here comes nil for schema at #{position}" unless schema

  # merge one_of/any_of/all_of
  ::JsonSchema::Faker::Configuration.logger.debug schema.inspect_schema if ::JsonSchema::Faker::Configuration.logger
  schema = compact_schema(schema, position: position)

  return schema.default if schema.default
  return self.class.formats[schema.format].call(schema, hint: hint, position: position) if self.class.formats.has_key?(schema.format)

  if schema.not
    hint ||= {}
    # too difficult
    # TODO: support one_of/any_of/all_of
    hint[:not_have_keys] = schema.not.required if schema.not.required
    hint[:not_be_values] = schema.not.enum     if schema.not.enum
  end

  # http://json-schema.org/latest/json-schema-validation.html#anchor75
  if schema.enum
    generate_by_enum(schema, hint: hint, position: position)
  else
    generate_by_type(schema, hint: hint, position: position)
  end
end

#compact_schema(schema, position:) ⇒ Object

TODO: compacting all_of and one_of/any_of at once will not work



226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
 
# File 'lib/json_schema/faker/strategy/simple.rb', line 226

def compact_schema(schema, position:)
  return schema if schema.one_of.empty? && schema.any_of.empty? && schema.all_of.empty?

  if ::JsonSchema::Faker::Configuration.logger
    ::JsonSchema::Faker::Configuration.logger.info "start to compact at #{position}"
    ::JsonSchema::Faker::Configuration.logger.debug schema.inspect_schema
  end

  merged_schema = ::JsonSchema::Schema.new
  merged_schema.copy_from(schema)
  merged_schema.one_of = []
  merged_schema.any_of = []
  merged_schema.all_of = []

  unless schema.all_of.empty?
    ::JsonSchema::Faker::Configuration.logger.info "compact all_of" if ::JsonSchema::Faker::Configuration.logger

    all_of = schema.all_of.each.with_index.inject(nil) do |(a, _), (b, i)|
      if a
        take_logical_and_of_schema(a, b, a_position: "#{position}/all_of", b_position: "#{position}/all_of[#{i+1}]")
      else
        b
      end
    end

    merged_schema = unless schema.one_of.empty? && schema.any_of.empty?
      ::JsonSchema::Faker::Configuration.logger.info "find from one_of and any_of which satiffy all_of" if ::JsonSchema::Faker::Configuration.logger
      one_of_candidate = schema.one_of.find do |s|
        s2 = take_logical_and_of_schema(s, all_of)
        compare_schema(s, s2) # FIXME: check s2 > s
      end

      any_of_candidate = schema.any_of.find do |s|
        s2 = take_logical_and_of_schema(s, all_of)
        compare_schema(s, s2) # FIXME: check s2 > s
      end

      unless one_of_candidate || any_of_candidate
        ::JsonSchema::Faker::Configuration.logger.error "failed to find condition which satfisfy all_of in one_of and any_of" if ::JsonSchema::Faker::Configuration.logger
        take_logical_and_of_schema(merged_schema, all_of, a_position: position, b_position: "#{position}/all_of")
      else
        take_logical_and_of_schema(merged_schema, one_of_candidate, a_position: position, b_position: "#{position}/one_of") if one_of_candidate
        take_logical_and_of_schema(merged_schema, any_of_candidate, a_position: position, b_position: "#{position}/any_of") if any_of_candidate
      end
    else
      take_logical_and_of_schema(merged_schema, all_of, a_position: position, b_position: "#{position}/all_of")
    end
  else
    unless schema.one_of.empty?
      ::JsonSchema::Faker::Configuration.logger.info "compact one_of" if ::JsonSchema::Faker::Configuration.logger
      merged_schema = take_logical_and_of_schema(merged_schema, schema.one_of.first, a_position: position, b_position: "#{position}/one_of[0]")
    end

    unless schema.any_of.empty?
      ::JsonSchema::Faker::Configuration.logger.info "compact any_of" if ::JsonSchema::Faker::Configuration.logger
      merged_schema = take_logical_and_of_schema(merged_schema, schema.any_of.first, a_position: position, b_position: "#{position}/any_of[0]")
    end
  end

  # compact recursively
  merged_schema = compact_schema(merged_schema, position: position)

  ::JsonSchema::Faker::Configuration.logger.debug "compacted: #{merged_schema.inspect_schema}" if ::JsonSchema::Faker::Configuration.logger

  merged_schema
end

#generate_by_enum(schema, hint: nil, position:) ⇒ Object 



119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
 
# File 'lib/json_schema/faker/strategy/simple.rb', line 119

def generate_by_enum(schema, hint: nil, position:)
  black_list = (hint ? hint[:not_be_values] : nil)
  list       = black_list ? schema.enum - black_list : schema.enum

  if ::JsonSchema::Faker::Configuration.logger
    ::JsonSchema::Faker::Configuration.logger.info "generate by enum at #{position}"
    ::JsonSchema::Faker::Configuration.logger.debug schema.inspect_schema
    ::JsonSchema::Faker::Configuration.logger.debug "black list: #{black_list}" if black_list
    ::JsonSchema::Faker::Configuration.logger.debug "list: #{list}"
  end

  return hint[:example] if hint && hint[:example] && hint[:example] && list.include?(hint[:example])

  list.first
end

#generate_by_type(schema, hint: nil, position:) ⇒ Object 



135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
 
# File 'lib/json_schema/faker/strategy/simple.rb', line 135

def generate_by_type(schema, hint: nil, position:)
  if ::JsonSchema::Faker::Configuration.logger
    ::JsonSchema::Faker::Configuration.logger.info "generate by type at #{position}"
    ::JsonSchema::Faker::Configuration.logger.debug schema.inspect_schema
  end

  # http://json-schema.org/latest/json-schema-core.html#anchor8
  # TODO: use include? than first
  case schema.type.first
  when "array"
    generate_for_array(schema, hint: hint, position: position)
  when "boolean"
    return hint[:example] if hint && hint[:example] && (hint[:example] === true || hint[:example] === false)

    true
  when "integer", "number"
    generate_for_number(schema, hint: hint, position: position)
  when "null"
    nil
  when "object", nil
    # here comes object without properties
    generate_for_object(schema, hint: hint, position: position)
  when "string"
    generate_for_string(schema, hint: hint, position: position)
  else
    raise "unknown type for #{schema.inspect_schema}"
  end
end

#generate_for_array(schema, hint: nil, position:) ⇒ Object 



164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
 
# File 'lib/json_schema/faker/strategy/simple.rb', line 164

def generate_for_array(schema, hint: nil, position:)
  # completing each items is difficult
  return hint[:example] if hint && hint[:example] && hint[:example].is_a?(Array)

  # http://json-schema.org/latest/json-schema-validation.html#anchor36
  # additionalItems items maxItems minItems uniqueItems
  length = schema.min_items || 0

  if schema.items.nil?
    length.times.map.with_index {|i| i }
  else
    if schema.items.is_a?(Array)
      items = schema.items.map.with_index {|e, i| generate(e, hint: hint, position: "#{position}/items[#{i}]") }

      items + (length - items.size).times.map.with_index {|i| schema.additional_items === false ? i : generate(schema.additional_items, hint: hint, position: "#{position}/additional_items[#{i}]") }
    else
      length.times.map.with_index {|i| generate(schema.items, hint: hint, position: "#{position}/items[#{i}]") }
    end
  end
end

#generate_for_number(schema, hint: nil, position:) ⇒ Object 



185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
 
# File 'lib/json_schema/faker/strategy/simple.rb', line 185

def generate_for_number(schema, hint: nil, position:)
  return hint[:example] if hint && hint[:example] && hint[:example].is_a?(Numeric)

  # http://json-schema.org/latest/json-schema-validation.html#anchor13
  # TODO: use hint[:not_be_values]
  min = schema.min
  max = schema.max

  if schema.multiple_of
    min = (min + schema.multiple_of - min % schema.multiple_of) if min
    max = (max - max % schema.multiple_of) if max
  end

  delta = schema.multiple_of ? schema.multiple_of : 1

  # TODO: more sophisticated caluculation
  min, max = [ (min || (max ? max - delta * 2 : 0)), (max || (min ? min + delta * 2 : 0)) ]

  # to get average of min and max can avoid exclusive*
  if schema.type.first == "integer"
    (min / delta + max / delta) / 2 * delta
  else
    (min + max) / 2.0
  end
end

#generate_for_object(schema, hint: nil, position:) ⇒ Object 



45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
 
# File 'lib/json_schema/faker/strategy/simple.rb', line 45

def generate_for_object(schema, hint: nil, position:)
  # complete hint
  object = if hint && hint[:example] && hint[:example].is_a?(Hash)
    hint[:example].each.with_object({}) do |(key, value), hash|
      if value.is_a?(Hash)
        if schema.properties.has_key?(key)
          hash[key] =  generate(schema.properties[key], hint: { example: hint[:example][key] }, position: "#{position}/#{key}")
        else
          # TODO: support pattern properties
          hash[key] = value
        end
      else
        hash[key] = value
      end
    end
  else
    {}
  end

  # http://json-schema.org/latest/json-schema-validation.html#anchor53
  if schema.required
    keys   = schema.required
    required_length = schema.min_properties || keys.length

    (keys - object.keys).each.with_object(object) do |key, hash|
      hash[key] = generate(schema.properties[key], hint: hint, position: "#{position}/#{key}")
    end
  else
    required_length = schema.min_properties || schema.max_properties || 0

    keys = (schema.properties || {}).keys - object.keys
    keys -= hint[:not_have_keys] if hint && hint[:not_have_keys]

    keys.first(required_length).each.with_object(object) do |key, hash|
      hash[key] = generate(schema.properties[key], hint: hint, position: "#{position}/#{key}")
    end
  end

  # if length is not enough
  if schema.additional_properties === false
    (required_length - object.keys.length).times.each.with_object(object) do |i, hash|
      if schema.pattern_properties.empty?
        key = (schema.properties.keys - object.keys).first
        hash[key] = generate(schema.properties[key], hint: hint, position: "#{position}/#{key}")
      else
        name = ::Pxeger.new(schema.pattern_properties.keys.first).generate
        hash[name] = generate(schema.pattern_properties.values.first, hint: hint, position: "#{position}/#{name}")
      end
    end
  else
    # FIXME: key confilct with properties
    (required_length - object.keys.length).times.each.with_object(object) do |i, hash|
      hash[i.to_s] = i
    end
  end

  # consider dependency
  depended_keys = object.keys & schema.dependencies.keys

  # FIXME: circular dependency is not supported
  depended_keys.each.with_object(object) do |key, hash|
    dependency = schema.dependencies[key]

    if dependency.is_a?(::JsonSchema::Schema)
      # too difficult we just merge
      hash.update(generate(schema.dependencies[key], hint: nil, position: "#{position}/dependencies/#{key}"))
    else
      dependency.each do |additional_key|
        object[additional_key] = generate(schema.properties[additional_key], hint: hint, position: "#{position}/dependencies/#{key}/#{additional_key}") unless object.has_key?(additional_key)
      end
    end
  end
end

#generate_for_string(schema, hint: nil, position:) ⇒ Object 



211
212
213
214
215
216
217
218
219
220
221
222
223
 
# File 'lib/json_schema/faker/strategy/simple.rb', line 211

def generate_for_string(schema, hint: nil, position:)
  return hint[:example] if hint && hint[:example] && hint[:example].is_a?(String)

  # http://json-schema.org/latest/json-schema-validation.html#anchor25
  # TODO: use hint[:not_be_values]
  # TODO: support format
  if schema.pattern
    ::Pxeger.new(schema.pattern).generate
  else
    length = schema.min_length || 0
    "a" * length
  end
end