DATACMNS-1743 - Polishing.

We now avoid identifier conversion in ReflectionrepositoryConverter if not necessary. Reestablish a couple of unit tests for DomainClassConverter that were disabled by accident.

src/test/java/org/springframework/data/repository/support/DomainClassConverterUnitTests.java

@@ -100,21 +100,16 @@ class DomainClassConverterUnitTests {
 		assertMatches(false);
 	}
 
-	// DATACMNS-233
+	@Test // DATACMNS-233
 	void returnsNullForNullSource() {
 		assertThat(converter.convert(null, STRING_TYPE, USER_TYPE)).isNull();
 	}
 
-	// DATACMNS-233
+	@Test // DATACMNS-233
 	void returnsNullForEmptyStringSource() {
 		assertThat(converter.convert("", STRING_TYPE, USER_TYPE)).isNull();
 	}
 
-	private void assertMatches(boolean matchExpected) {
-
-		assertThat(converter.matches(STRING_TYPE, USER_TYPE)).isEqualTo(matchExpected);
-	}
-
 	@Test
 	void convertsStringToUserCorrectly() throws Exception {
 
@@ -234,6 +229,10 @@ class DomainClassConverterUnitTests {
 		return ctx;
 	}
 
+	private void assertMatches(boolean matchExpected) {
+		assertThat(converter.matches(STRING_TYPE, USER_TYPE)).isEqualTo(matchExpected);
+	}
+
 	static interface Wrapper {
 
 		void foo(@ModelAttribute User user);