Add nullability annotations to tests in smoke-test/spring-boot-smoke-test-cache

See gh-47263

smoke-test/spring-boot-smoke-test-cache/build.gradle

@@ -107,3 +107,11 @@ def testInfinispan = tasks.register("testInfinispan", Test) {
 tasks.named("check").configure {
 	dependsOn testCaffeine, testCouchbase, testEhcache, testHazelcast, testInfinispan
 }
+
+tasks.named("compileTestJava") {
+	options.nullability.checking = "tests"
+}
+
+tasks.named("compileDockerTestJava") {
+	options.nullability.checking = "tests"
+}

smoke-test/spring-boot-smoke-test-cache/src/dockerTest/java/smoketest/cache/SampleCacheApplicationRedisTests.java

@@ -26,6 +26,7 @@ import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.testcontainers.service.connection.ServiceConnection;
 import org.springframework.boot.testsupport.container.TestImage;
 import org.springframework.cache.Cache;
+import org.springframework.cache.Cache.ValueWrapper;
 import org.springframework.cache.CacheManager;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -51,7 +52,9 @@ class SampleCacheApplicationRedisTests {
 		countries.clear(); // Simple test assuming the cache is empty
 		assertThat(countries.get("BE")).isNull();
 		Country be = this.countryRepository.findByCode("BE");
-		assertThat((Country) countries.get("BE").get()).isEqualTo(be);
+		ValueWrapper belgium = countries.get("BE");
+		assertThat(belgium).isNotNull();
+		assertThat((Country) belgium.get()).isEqualTo(be);
 	}
 
 }

smoke-test/spring-boot-smoke-test-cache/src/test/java/smoketest/cache/SampleCacheApplicationTests.java

@@ -21,6 +21,7 @@ import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.cache.Cache;
+import org.springframework.cache.Cache.ValueWrapper;
 import org.springframework.cache.CacheManager;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -41,7 +42,9 @@ class SampleCacheApplicationTests {
 		countries.clear(); // Simple test assuming the cache is empty
 		assertThat(countries.get("BE")).isNull();
 		Country be = this.countryRepository.findByCode("BE");
-		assertThat((Country) countries.get("BE").get()).isEqualTo(be);
+		ValueWrapper belgium = countries.get("BE");
+		assertThat(belgium).isNotNull();
+		assertThat((Country) belgium.get()).isEqualTo(be);
 	}
 
 }