Fix global clearing of exclusion-only unique generators

lib/helpers/unique_generator.rb

@@ -51,6 +51,7 @@ def self.clear
     end
 
     def exclude(name, arguments, values)
+      self.class.marked_unique.add(self)
       values ||= []
       values.each do |value|
         previous_results[[name, arguments]] << value

test/faker/default/test_faker_unique_generator.rb

@@ -123,6 +123,54 @@ def stubbed_generator2.test
     end
   end
 
+  def test_global_clear_removes_exclusions_before_first_generation
+    source = Object.new
+    def source.value
+      1
+    end
+
+    generator = Faker::UniqueGenerator.new(source, 3)
+    generator.exclude(:value, [], [1])
+
+    Faker::UniqueGenerator.clear
+
+    assert_equal(1, generator.value)
+  end
+
+  def test_global_clear_removes_exclusions_after_previous_clear
+    source = Object.new
+    def source.value
+      1
+    end
+
+    generator = Faker::UniqueGenerator.new(source, 3)
+
+    assert_equal(1, generator.value)
+    Faker::UniqueGenerator.clear
+    generator.exclude(:value, [], [1])
+    Faker::UniqueGenerator.clear
+
+    assert_equal(1, generator.value)
+  end
+
+  def test_global_clear_keeps_exclusions_in_other_threads
+    source = Object.new
+    def source.value
+      1
+    end
+
+    generator = Faker::UniqueGenerator.new(source, 3)
+    generator.exclude(:value, [], [1])
+    Thread.new { Faker::UniqueGenerator.clear }.join
+
+    assert_raises Faker::UniqueGenerator::RetryLimitExceeded do
+      generator.value
+    end
+    Faker::UniqueGenerator.clear
+
+    assert_equal(1, generator.value)
+  end
+
   def test_thread_safety
     stubbed_generator = Object.new
     def stubbed_generator.test