adding test cases for the dynamic finder matcher match method

activerecord/test/cases/dynamic_finder_match_test.rb

@@ -0,0 +1,49 @@
+require "cases/helper"
+
+module ActiveRecord
+  class DynamicFinderMatchTest < ActiveRecord::TestCase
+    def test_find_by
+      m = DynamicFinderMatch.match(:find_by_foo)
+      assert_equal :first, m.finder
+      assert_equal %w{ foo }, m.attribute_names
+    end
+
+    def test_find_all_by
+      m = DynamicFinderMatch.match(:find_all_by_foo)
+      assert_equal :all, m.finder
+      assert_equal %w{ foo }, m.attribute_names
+    end
+
+    def test_find_last_by
+      m = DynamicFinderMatch.match(:find_last_by_foo)
+      assert_equal :last, m.finder
+      assert_equal %w{ foo }, m.attribute_names
+    end
+
+    def test_find_by!
+      m = DynamicFinderMatch.match(:find_by_foo!)
+      assert_equal :first, m.finder
+      assert m.bang?, 'should be banging'
+      assert_equal %w{ foo }, m.attribute_names
+    end
+
+    def test_find_or_create
+      m = DynamicFinderMatch.match(:find_or_create_by_foo)
+      assert_equal :first, m.finder
+      assert_equal %w{ foo }, m.attribute_names
+      assert_equal :create, m.instantiator
+    end
+
+    def test_find_or_initialize
+      m = DynamicFinderMatch.match(:find_or_initialize_by_foo)
+      assert_equal :first, m.finder
+      assert_equal %w{ foo }, m.attribute_names
+      assert_equal :new, m.instantiator
+    end
+
+    def test_garbage
+      assert !DynamicFinderMatch.match(:fooo), 'should be false'
+      assert !DynamicFinderMatch.match(:find_by), 'should be false'
+    end
+  end
+end