Small testing additions

Author: courtneyeh

validator/api/src/test/java/tech/pegasys/teku/validator/api/GraffitiManagerTest.java

@@ -141,7 +141,8 @@ void deleteGraffiti_shouldReturnErrorMessageWhenUnableToDeleteFile(@TempDir fina
     assertThat(file.getParentFile().setWritable(false)).isTrue();
 
     assertThatThrownBy(() -> manager.deleteGraffiti(publicKey))
-        .isInstanceOf(GraffitiManagementException.class);
+        .isInstanceOf(GraffitiManagementException.class)
+        .hasMessage("Unable to delete graffiti for validator " + publicKey);
     assertThat(file.exists()).isTrue();
   }
 

validator/api/src/test/java/tech/pegasys/teku/validator/api/UpdatableGraffitiProviderTest.java

@@ -70,29 +70,29 @@ public void get_shouldDelegateToDefaultProviderWhenStorageProviderFails() throws
   }
 
   @Test
-  void getWithThrowable_shouldGetStorageGraffitiWhenAvailable() {
+  void getWithThrowable_shouldGetStorageGraffitiWhenAvailable() throws Throwable {
     provider = new UpdatableGraffitiProvider(() -> Optional.of(storageGraffiti), Optional::empty);
-    assertThat(provider.get()).hasValue(storageGraffiti);
+    assertThat(provider.getWithThrowable()).hasValue(storageGraffiti);
   }
 
   @Test
-  void getWithThrowable_shouldGetStorageGraffitiWhenBothAvailable() {
+  void getWithThrowable_shouldGetStorageGraffitiWhenBothAvailable() throws Throwable {
     provider =
         new UpdatableGraffitiProvider(
             () -> Optional.of(storageGraffiti), () -> Optional.of(defaultGraffiti));
-    assertThat(provider.get()).hasValue(storageGraffiti);
+    assertThat(provider.getWithThrowable()).hasValue(storageGraffiti);
   }
 
   @Test
-  void getWithThrowable_shouldGetDefaultGraffitiWhenStorageEmpty() {
+  void getWithThrowable_shouldGetDefaultGraffitiWhenStorageEmpty() throws Throwable {
     provider = new UpdatableGraffitiProvider(Optional::empty, () -> Optional.of(defaultGraffiti));
-    assertThat(provider.get()).hasValue(defaultGraffiti);
+    assertThat(provider.getWithThrowable()).hasValue(defaultGraffiti);
   }
 
   @Test
-  void getWithThrowable_shouldBeEmptyWhenBothEmpty() {
+  void getWithThrowable_shouldBeEmptyWhenBothEmpty() throws Throwable {
     provider = new UpdatableGraffitiProvider(Optional::empty, Optional::empty);
-    assertThat(provider.get()).isEmpty();
+    assertThat(provider.getWithThrowable()).isEmpty();
   }
 
   @Test