Add test cases

Signed-off-by: anaconda875 <hflbtmax@gmail.com>

Author: anaconda875

spring-web/src/test/java/org/springframework/web/client/support/RestClientAdapterTests.java

@@ -25,6 +25,7 @@
 import java.net.URI;
 import java.nio.charset.StandardCharsets;
 import java.util.LinkedHashSet;
+import java.util.List;
 import java.util.Optional;
 import java.util.Set;
 import java.util.function.BiFunction;
@@ -103,6 +104,12 @@ void shutdown() {
 	@interface ParameterizedAdapterTest {
 	}
 
+	public static Stream<Object> wildcardCases() {
+		return Stream.of(
+				(Function<PersonClient, List<? extends Person>>) BaseClient::getListWildcardUpperBound1,
+				(Function<PersonClient, List<? extends Person>>) BaseClient::getListWildcardUpperBound2);
+	}
+
 	public static Stream<Object[]> arguments() throws IOException {
 		return Stream.of(
 				createArgsForAdapter((url, or) -> {
@@ -216,6 +223,15 @@ void getEntityWithGenericReturnType() {
 		assertThat(entity.getBody().name()).isEqualTo("Karl");
 	}
 
+	@ParameterizedTest
+	@MethodSource("wildcardCases")
+	void getWildcardReturnType(Function<PersonClient, List<? extends Person>> invocation) {
+		PersonClient client = initService(PersonClient.class);
+		prepareResponse(r -> r.setHeader("Content-Type", "application/json").body("[{\"name\":\"Karl\"}]"));
+		List<? extends Person> list = invocation.apply(client);
+		assertThat(list.get(0).name()).isEqualTo("Karl");
+	}
+
 	@ParameterizedAdapterTest
 	void getWithUriBuilderFactory(MockWebServer server, Service service) throws InterruptedException {
 		prepareResponse(builder ->
@@ -467,6 +483,12 @@ private interface BaseClient<T> {
 		@GetExchange
 		T getBody();
 
+		@GetExchange
+		List<? extends T> getListWildcardUpperBound1();
+
+		@GetExchange
+		List<? extends Person> getListWildcardUpperBound2();
+
 		@GetExchange
 		ResponseEntity<T> getEntity();
 	}