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@@ -403,8 +403,10 @@ module PluginAWeek #:nodoc:
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         # for the attribute
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         def add_named_scopes
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           [attribute, attribute.pluralize].uniq.each do |name|
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-            name = "with_#{name}"
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-            owner_class.named_scope name.to_sym, lambda {|*values| {:conditions => {attribute => values.flatten}}} unless owner_class.respond_to?(name)
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+            with_name = "with_#{name}"
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+            without_name = "without_#{name}"
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+            owner_class.named_scope with_name.to_sym, lambda {|*values| {:conditions => {attribute => values.flatten}}} unless owner_class.respond_to?(with_name)
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+            owner_class.named_scope without_name.to_sym, lambda {|*values| {:conditions => ["#{attribute} NOT IN (?)", values.flatten]}} unless owner_class.respond_to?(without_name)
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           end
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         end
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     end

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@@ -60,6 +60,13 @@ class MachineTest < Test::Unit::TestCase
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     assert_equal [on], Switch.with_state('on')
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   end
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+  def test_should_define_a_named_scope_for_excluding_the_attribute
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+    on = create_switch(:state => 'on')
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+    off = create_switch(:state => 'off')
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+    
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+    assert_equal [off], Switch.without_state('on')
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+  end
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+  
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   def test_should_define_a_pluralized_named_scope_for_the_attribute
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     on = create_switch(:state => 'on')
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     off = create_switch(:state => 'off')
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@@ -67,6 +74,14 @@ class MachineTest < Test::Unit::TestCase
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     assert_equal [on, off], Switch.with_states('on', 'off')
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   end
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+  def test_should_define_a_pluralized_named_scope_for_excluding_the_attribute
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+    on = create_switch(:state => 'on')
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+    off = create_switch(:state => 'off')
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+    unsure = create_switch(:state => 'unsure')
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+    
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+    assert_equal [unsure], Switch.without_states('on', 'off')
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+  end
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+  
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   def test_should_raise_exception_if_invalid_option_specified
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     assert_raise(ArgumentError) {PluginAWeek::StateMachine::Machine.new(Switch, 'state', :invalid => true)}
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   end
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@@ -145,6 +160,14 @@ class MachineWithConflictingNamedScopesTest < Test::Unit::TestCase
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     def self.with_states
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       :custom
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     end
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+    
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+    def self.without_state
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+      :custom
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+    end
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+    
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+    def self.without_states
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+      :custom
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+    end
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   end
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   def setup
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@@ -155,6 +178,14 @@ class MachineWithConflictingNamedScopesTest < Test::Unit::TestCase
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     assert_equal :custom, Switch.with_state
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   end
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+  def test_should_not_define_a_named_scope_for_excluding_the_attribute
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+    assert_equal :custom, Switch.without_state
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+  end
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+  
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+  def test_should_not_define_a_pluralized_named_scope_for_excluding_the_attribute
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+    assert_equal :custom, Switch.without_states
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+  end
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+  
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   def test_should_not_define_a_pluralized_named_scope_for_the_attribute
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     assert_equal :custom, Switch.with_states
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   end