tests: increase coverage

lesson_16/objects/objects_app/build.gradle.kts

@@ -17,14 +17,12 @@ repositories {
 
 dependencies {
     // Use JUnit Jupiter for testing.
-    testImplementation("com.codedifferently.instructional:instructional-lib")
     testImplementation("org.junit.jupiter:junit-jupiter:5.9.1")
     testImplementation("org.springframework.boot:spring-boot-starter-test")
     testImplementation("org.assertj:assertj-core:3.25.1")
     testImplementation("at.favre.lib:bcrypt:0.10.2")
 
     // This dependency is used by the application.
-    implementation("com.codedifferently.instructional:instructional-lib")
     implementation("com.google.guava:guava:31.1-jre")
     implementation("com.google.code.gson:gson:2.10.1")
     implementation("org.projectlombok:lombok:1.18.30")

lesson_16/objects/objects_app/src/test/java/com/codedifferently/lesson16/Lesson16Test.java

@@ -3,11 +3,13 @@
 import static org.assertj.core.api.Assertions.assertThat;
 
 import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
 
+@SpringBootTest(useMainMethod = SpringBootTest.UseMainMethod.WHEN_AVAILABLE)
 class Lesson16Test {
 
   @Test
-  void testCanVote() {
+  void testMain() {
     assertThat(new Lesson16()).isNotNull();
   }
 }

lesson_16/objects/settings.gradle.kts

@@ -7,7 +7,5 @@
  * in the user manual at https://docs.gradle.org/8.0.2/userguide/multi_project_builds.html
  */
 
-includeBuild("../../lib/java/codedifferently-instructional")
-
 rootProject.name = "lesson_16"
 include("objects_app")