SeriesServiceImpl.findBy(Collection): add unit tests.

Fix #36

Author: php-coder

src/test/groovy/ru/mystamps/web/service/SeriesServiceImplTest.groovy

@@ -864,4 +864,48 @@ class SeriesServiceImplTest extends Specification {
 			result == expectedResult
 	}
 
+	//
+	// Tests for findBy(Collection)
+	//
+	
+	def "findBy(Collection) should throw exception when collection is null"() {
+		when:
+			service.findBy(null as Collection, 'whatever')
+		then:
+			thrown IllegalArgumentException
+	}
+	
+	def "findBy(Collection) should throw exception when collection id is null"() {
+		given:
+			Collection collection = Mock()
+			collection.getId() >> null
+		when:
+			service.findBy(collection, 'whatever')
+		then:
+			thrown IllegalArgumentException
+	}
+	
+	def "findBy(Collection) should pass arguments to dao"() {
+		given:
+			Integer expectedCollectionId = 16
+		and:
+			String expectedLang = 'expected'
+		and:
+			Collection expectedCollection = Mock()
+			expectedCollection.getId() >> expectedCollectionId
+		when:
+			service.findBy(expectedCollection, expectedLang)
+		then:
+			1 * seriesDao.findByAsSeriesInfo(
+				{ Integer collectionId ->
+					assert expectedCollectionId == collectionId
+					return true
+				},
+				{ String lang ->
+					assert expectedLang == lang
+					return true
+				}
+			) >> []
+	}
+	
 }