tasanuma commented on a change in pull request #2983:
URL: https://github.com/apache/hadoop/pull/2983#discussion_r630937412



##########
File path: 
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/security/alias/TestCredentialProviderFactory.java
##########
@@ -250,18 +247,14 @@ public void testLocalJksProvider() throws Exception {
   }
 
   @Test
-  public void testLocalBCFKSProvider() throws Exception {
+  public void testLocalBCFKSProvider() {
     Configuration conf = new Configuration();
     final Path ksPath = new Path(tmpDir.toString(), "test.bcfks");
     final String ourUrl = LocalBouncyCastleFipsKeyStoreProvider.SCHEME_NAME +
         "://file" + ksPath.toUri();
     conf.set(CredentialProviderFactory.CREDENTIAL_PROVIDER_PATH, ourUrl);
-
-    exception.expect(IOException.class);
-    exception.expectMessage("Can't create keystore");
-    List<CredentialProvider> providers =
-        CredentialProviderFactory.getProviders(conf);
-    assertTrue("BCFKS needs additional JDK setup", providers.isEmpty());
+    assertThrows("Can't create keystore", IOException.class,
+        () -> CredentialProviderFactory.getProviders(conf));

Review comment:
       It seems not to validate the error message. Per the [junit 
docs](https://junit.org/junit5/docs/current/user-guide/#writing-tests-assertions),
   ```suggestion
       Exception exception = assertThrows(IOException.class,
           () -> CredentialProviderFactory.getProviders(conf));
       assertEquals("Can't create keystore", exception.getMessage());
   ```

##########
File path: 
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/TestConfiguration.java
##########
@@ -50,6 +50,7 @@
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
+import org.assertj.core.api.Assertions;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;

Review comment:
       ```suggestion
   ```




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