Polishing.

Add issue reference and additional test for dot path resolution.

Original Pull Request: #2650

Author: christophstrobl

src/test/java/org/springframework/data/querydsl/binding/QuerydslPredicateBuilderUnitTests.java

@@ -182,7 +182,7 @@ void leavesCommaSeparatedArgumentUntouchedWhenTargetIsNotAnArray() {
 		assertThat(constant.getConstant()).isEqualTo("rivers,two");
 	}
 
-	@Test
+	@Test // GH-2649
 	void resolvesCommaSeparatedArgumentToListCorrectly() {
 
 		values.add("nickNames", "Walt,Heisenberg");
@@ -194,6 +194,17 @@ void resolvesCommaSeparatedArgumentToListCorrectly() {
 		assertThat(constant.getConstant()).isEqualTo(Arrays.asList("Walt", "Heisenberg"));
 	}
 
+	@Test // GH-2649
+	void resolvesCommaSeparatedArgumentToListCorrectlyForNestedPath() {
+
+		values.add("user.nickNames", "Walt,Heisenberg");
+
+		var predicate = builder.getPredicate(TypeInformation.of(UserWrapper.class), values, DEFAULT_BINDINGS);
+		var constant = (Constant<Object>) ((List<?>) getField(getField(predicate, "mixin"), "args")).get(0);
+
+		assertThat(constant.getConstant()).isEqualTo(Arrays.asList("Walt", "Heisenberg"));
+	}
+
 	@Test // DATACMNS-883
 	void automaticallyInsertsAnyStepInCollectionReference() {