DATACMNS-1450 - Introduced type-safe Sort API.

We now expose a TypedSort that can use method handles to define properties to sort by.

Sort.sort(Person.class).by(Person::getName).ascending();

Related tickets: DATACMNS-1449.

src/test/java/org/springframework/data/domain/SortUnitTests.java

@@ -18,6 +18,10 @@ package org.springframework.data.domain;
 import static org.assertj.core.api.Assertions.*;
 import static org.springframework.data.domain.Sort.NullHandling.*;
 
+import lombok.Getter;
+
+import java.util.Collection;
+
 import org.junit.Test;
 import org.springframework.data.domain.Sort.Direction;
 import org.springframework.data.domain.Sort.Order;
@@ -172,4 +176,28 @@ public class SortUnitTests {
 				.isThrownBy(() -> Sort.by((Direction) null, "foo"))//
 				.withMessageContaining("Direction");
 	}
+
+	@Test // DATACMNS-1450
+	public void translatesTypedSortCorrectly() {
+
+		assertThat(Sort.sort(Sample.class).by(Sample::getNested).by(Nested::getFirstname)) //
+				.containsExactly(Order.by("nested.firstname"));
+
+		assertThat(Sort.sort(Sample.class).by((Sample it) -> it.getNested().getFirstname())) //
+				.containsExactly(Order.by("nested.firstname"));
+
+		assertThat(Sort.sort(Sample.class).by(Sample::getNesteds).by(Nested::getFirstname)) //
+				.containsExactly(Order.by("nesteds.firstname"));
+	}
+
+	@Getter
+	static class Sample {
+		Nested nested;
+		Collection<Nested> nesteds;
+	}
+
+	@Getter
+	static class Nested {
+		String firstname;
+	}
 }