vendor/rails/activerecord/test/cases/calculations_test.rb

   1 require "cases/helper"
   2 require 'models/company'
   3 require 'models/topic'
   4 require 'models/edge'
   5
   6 Company.has_many :accounts
   7
   8 class NumericData < ActiveRecord::Base
   9   self.table_name = 'numeric_data'
  10 end
  11
  12 class CalculationsTest < ActiveRecord::TestCase
  13   fixtures :companies, :accounts, :topics
  14
  15   def test_should_sum_field
  16     assert_equal 318, Account.sum(:credit_limit)
  17   end
  18
  19   def test_should_average_field
  20     value = Account.average(:credit_limit)
  21     assert_kind_of BigDecimal, value
  22     assert_equal BigDecimal.new('53.0'), value
  23   end
  24
  25   def test_should_return_nil_as_average
  26     assert_nil NumericData.average(:bank_balance)
  27   end
  28
  29   def test_type_cast_calculated_value_should_convert_db_averages_of_fixnum_class_to_decimal
  30     assert_equal 0, NumericData.send(:type_cast_calculated_value, 0, nil, 'avg')
  31     assert_equal 53.0, NumericData.send(:type_cast_calculated_value, 53, nil, 'avg')
  32   end
  33
  34   def test_should_get_maximum_of_field
  35     assert_equal 60, Account.maximum(:credit_limit)
  36   end
  37
  38   def test_should_get_maximum_of_field_with_include
  39     assert_equal 50, Account.maximum(:credit_limit, :include => :firm, :conditions => "companies.name != 'Summit'")
  40   end
  41
  42   def test_should_get_maximum_of_field_with_scoped_include
  43     Account.with_scope :find => { :include => :firm, :conditions => "companies.name != 'Summit'" } do
  44       assert_equal 50, Account.maximum(:credit_limit)
  45     end
  46   end
  47
  48   def test_should_get_minimum_of_field
  49     assert_equal 50, Account.minimum(:credit_limit)
  50   end
  51
  52   def test_should_group_by_field
  53     c = Account.sum(:credit_limit, :group => :firm_id)
  54     [1,6,2].each { |firm_id| assert c.keys.include?(firm_id) }
  55   end
  56
  57   def test_should_group_by_summed_field
  58     c = Account.sum(:credit_limit, :group => :firm_id)
  59     assert_equal 50,   c[1]
  60     assert_equal 105,  c[6]
  61     assert_equal 60,   c[2]
  62   end
  63
  64   def test_should_order_by_grouped_field
  65     c = Account.sum(:credit_limit, :group => :firm_id, :order => "firm_id")
  66     assert_equal [1, 2, 6, 9], c.keys.compact
  67   end
  68
  69   def test_should_order_by_calculation
  70     c = Account.sum(:credit_limit, :group => :firm_id, :order => "sum_credit_limit desc, firm_id")
  71     assert_equal [105, 60, 53, 50, 50], c.keys.collect { |k| c[k] }
  72     assert_equal [6, 2, 9, 1], c.keys.compact
  73   end
  74
  75   def test_should_limit_calculation
  76     c = Account.sum(:credit_limit, :conditions => "firm_id IS NOT NULL",
  77                     :group => :firm_id, :order => "firm_id", :limit => 2)
  78     assert_equal [1, 2], c.keys.compact
  79   end
  80
  81   def test_should_limit_calculation_with_offset
  82     c = Account.sum(:credit_limit, :conditions => "firm_id IS NOT NULL",
  83                     :group => :firm_id, :order => "firm_id", :limit => 2, :offset => 1)
  84     assert_equal [2, 6], c.keys.compact
  85   end
  86
  87   def test_should_group_by_summed_field_having_condition
  88     c = Account.sum(:credit_limit, :group => :firm_id,
  89                                    :having => 'sum(credit_limit) > 50')
  90     assert_nil        c[1]
  91     assert_equal 105, c[6]
  92     assert_equal 60,  c[2]
  93   end
  94
  95   def test_should_group_by_summed_association
  96     c = Account.sum(:credit_limit, :group => :firm)
  97     assert_equal 50,   c[companies(:first_firm)]
  98     assert_equal 105,  c[companies(:rails_core)]
  99     assert_equal 60,   c[companies(:first_client)]
 100   end
 101
 102   def test_should_sum_field_with_conditions
 103     assert_equal 105, Account.sum(:credit_limit, :conditions => 'firm_id = 6')
 104   end
 105
 106   def test_should_return_zero_if_sum_conditions_return_nothing
 107     assert_equal 0, Account.sum(:credit_limit, :conditions => '1 = 2')
 108     assert_equal 0, companies(:rails_core).companies.sum(:id, :conditions => '1 = 2')
 109   end
 110
 111   def test_sum_should_return_valid_values_for_decimals
 112     NumericData.create(:bank_balance => 19.83)
 113     assert_equal 19.83, NumericData.sum(:bank_balance)
 114   end
 115
 116   def test_should_group_by_summed_field_with_conditions
 117     c = Account.sum(:credit_limit, :conditions => 'firm_id > 1',
 118                                    :group => :firm_id)
 119     assert_nil        c[1]
 120     assert_equal 105, c[6]
 121     assert_equal 60,  c[2]
 122   end
 123
 124   def test_should_group_by_summed_field_with_conditions_and_having
 125     c = Account.sum(:credit_limit, :conditions => 'firm_id > 1',
 126                                    :group => :firm_id,
 127                                    :having => 'sum(credit_limit) > 60')
 128     assert_nil        c[1]
 129     assert_equal 105, c[6]
 130     assert_nil        c[2]
 131   end
 132
 133   def test_should_group_by_fields_with_table_alias
 134     c = Account.sum(:credit_limit, :group => 'accounts.firm_id')
 135     assert_equal 50,  c[1]
 136     assert_equal 105, c[6]
 137     assert_equal 60,  c[2]
 138   end
 139
 140   def test_should_calculate_with_invalid_field
 141     assert_equal 6, Account.calculate(:count, '*')
 142     assert_equal 6, Account.calculate(:count, :all)
 143   end
 144
 145   def test_should_calculate_grouped_with_invalid_field
 146     c = Account.count(:all, :group => 'accounts.firm_id')
 147     assert_equal 1, c[1]
 148     assert_equal 2, c[6]
 149     assert_equal 1, c[2]
 150   end
 151
 152   def test_should_calculate_grouped_association_with_invalid_field
 153     c = Account.count(:all, :group => :firm)
 154     assert_equal 1, c[companies(:first_firm)]
 155     assert_equal 2, c[companies(:rails_core)]
 156     assert_equal 1, c[companies(:first_client)]
 157   end
 158
 159   uses_mocha 'group_by_non_numeric_foreign_key_association' do
 160     def test_should_group_by_association_with_non_numeric_foreign_key
 161       ActiveRecord::Base.connection.expects(:select_all).returns([{"count_all" => 1, "firm_id" => "ABC"}])
 162
 163       firm = mock()
 164       firm.expects(:id).returns("ABC")
 165       firm.expects(:class).returns(Firm)
 166       Company.expects(:find).with(["ABC"]).returns([firm])
 167
 168       column = mock()
 169       column.expects(:name).at_least_once.returns(:firm_id)
 170       column.expects(:type_cast).with("ABC").returns("ABC")
 171       Account.expects(:columns).at_least_once.returns([column])
 172
 173       c = Account.count(:all, :group => :firm)
 174       assert_equal Firm, c.first.first.class
 175       assert_equal 1, c.first.last
 176     end
 177   end
 178
 179   def test_should_calculate_grouped_association_with_foreign_key_option
 180     Account.belongs_to :another_firm, :class_name => 'Firm', :foreign_key => 'firm_id'
 181     c = Account.count(:all, :group => :another_firm)
 182     assert_equal 1, c[companies(:first_firm)]
 183     assert_equal 2, c[companies(:rails_core)]
 184     assert_equal 1, c[companies(:first_client)]
 185   end
 186
 187   def test_should_not_modify_options_when_using_includes
 188     options = {:conditions => 'companies.id > 1', :include => :firm}
 189     options_copy = options.dup
 190
 191     Account.count(:all, options)
 192     assert_equal options_copy, options
 193   end
 194
 195   def test_should_calculate_grouped_by_function
 196     c = Company.count(:all, :group => "UPPER(#{QUOTED_TYPE})")
 197     assert_equal 2, c[nil]
 198     assert_equal 1, c['DEPENDENTFIRM']
 199     assert_equal 3, c['CLIENT']
 200     assert_equal 2, c['FIRM']
 201   end
 202
 203   def test_should_calculate_grouped_by_function_with_table_alias
 204     c = Company.count(:all, :group => "UPPER(companies.#{QUOTED_TYPE})")
 205     assert_equal 2, c[nil]
 206     assert_equal 1, c['DEPENDENTFIRM']
 207     assert_equal 3, c['CLIENT']
 208     assert_equal 2, c['FIRM']
 209   end
 210
 211   def test_should_not_overshadow_enumerable_sum
 212     assert_equal 6, [1, 2, 3].sum(&:abs)
 213   end
 214
 215   def test_should_sum_scoped_field
 216     assert_equal 15, companies(:rails_core).companies.sum(:id)
 217   end
 218
 219   def test_should_sum_scoped_field_with_conditions
 220     assert_equal 8,  companies(:rails_core).companies.sum(:id, :conditions => 'id > 7')
 221   end
 222
 223   def test_should_group_by_scoped_field
 224     c = companies(:rails_core).companies.sum(:id, :group => :name)
 225     assert_equal 7, c['Leetsoft']
 226     assert_equal 8, c['Jadedpixel']
 227   end
 228
 229   def test_should_group_by_summed_field_with_conditions_and_having
 230     c = companies(:rails_core).companies.sum(:id, :group => :name,
 231                                                   :having => 'sum(id) > 7')
 232     assert_nil      c['Leetsoft']
 233     assert_equal 8, c['Jadedpixel']
 234   end
 235
 236   def test_should_reject_invalid_options
 237     assert_nothing_raised do
 238       [:count, :sum].each do |func|
 239         # empty options are valid
 240         Company.send(:validate_calculation_options, func)
 241         # these options are valid for all calculations
 242         [:select, :conditions, :joins, :order, :group, :having, :distinct].each do |opt|
 243           Company.send(:validate_calculation_options, func, opt => true)
 244         end
 245       end
 246
 247       # :include is only valid on :count
 248       Company.send(:validate_calculation_options, :count, :include => true)
 249     end
 250
 251     assert_raises(ArgumentError) { Company.send(:validate_calculation_options, :sum,   :foo => :bar) }
 252     assert_raises(ArgumentError) { Company.send(:validate_calculation_options, :count, :foo => :bar) }
 253   end
 254
 255   def test_should_count_selected_field_with_include
 256     assert_equal 6, Account.count(:distinct => true, :include => :firm)
 257     assert_equal 4, Account.count(:distinct => true, :include => :firm, :select => :credit_limit)
 258   end
 259
 260   def test_should_count_manual_select_with_include
 261     assert_equal 6, Account.count(:select => "DISTINCT accounts.id", :include => :firm)
 262   end
 263
 264   def test_count_with_column_parameter
 265     assert_equal 5, Account.count(:firm_id)
 266   end
 267
 268   def test_count_with_column_and_options_parameter
 269     assert_equal 2, Account.count(:firm_id, :conditions => "credit_limit = 50")
 270   end
 271
 272   def test_count_with_no_parameters_isnt_deprecated
 273     assert_not_deprecated { Account.count }
 274   end
 275
 276   def test_count_with_too_many_parameters_raises
 277     assert_raise(ArgumentError) { Account.count(1, 2, 3) }
 278   end
 279
 280   def test_should_sum_expression
 281     assert_equal '636', Account.sum("2 * credit_limit")
 282   end
 283
 284   def test_count_with_from_option
 285     assert_equal Company.count(:all), Company.count(:all, :from => 'companies')
 286     assert_equal Account.count(:all, :conditions => "credit_limit = 50"),
 287         Account.count(:all, :from => 'accounts', :conditions => "credit_limit = 50")
 288     assert_equal Company.count(:type, :conditions => {:type => "Firm"}),
 289         Company.count(:type, :conditions => {:type => "Firm"}, :from => 'companies')
 290   end
 291
 292   def test_sum_with_from_option
 293     assert_equal Account.sum(:credit_limit), Account.sum(:credit_limit, :from => 'accounts')
 294     assert_equal Account.sum(:credit_limit, :conditions => "credit_limit > 50"),
 295         Account.sum(:credit_limit, :from => 'accounts', :conditions => "credit_limit > 50")
 296   end
 297
 298   def test_average_with_from_option
 299     assert_equal Account.average(:credit_limit), Account.average(:credit_limit, :from => 'accounts')
 300     assert_equal Account.average(:credit_limit, :conditions => "credit_limit > 50"),
 301         Account.average(:credit_limit, :from => 'accounts', :conditions => "credit_limit > 50")
 302   end
 303
 304   def test_minimum_with_from_option
 305     assert_equal Account.minimum(:credit_limit), Account.minimum(:credit_limit, :from => 'accounts')
 306     assert_equal Account.minimum(:credit_limit, :conditions => "credit_limit > 50"),
 307         Account.minimum(:credit_limit, :from => 'accounts', :conditions => "credit_limit > 50")
 308   end
 309
 310   def test_maximum_with_from_option
 311     assert_equal Account.maximum(:credit_limit), Account.maximum(:credit_limit, :from => 'accounts')
 312     assert_equal Account.maximum(:credit_limit, :conditions => "credit_limit > 50"),
 313         Account.maximum(:credit_limit, :from => 'accounts', :conditions => "credit_limit > 50")
 314   end
 315
 316   def test_from_option_with_specified_index
 317     if Edge.connection.adapter_name == 'MySQL'
 318       assert_equal Edge.count(:all), Edge.count(:all, :from => 'edges USE INDEX(unique_edge_index)')
 319       assert_equal Edge.count(:all, :conditions => 'sink_id < 5'),
 320           Edge.count(:all, :from => 'edges USE INDEX(unique_edge_index)', :conditions => 'sink_id < 5')
 321     end
 322   end
 323
 324   def test_from_option_with_table_different_than_class
 325     assert_equal Account.count(:all), Company.count(:all, :from => 'accounts')
 326   end
 327
 328 end