mvn javadoc:javadoc
```

### Testing

The project uses JUnit 4 with embedded OpenSearch for integration testing:

```bash
# Run all tests
mvn test

# Run specific test class
mvn test -Dtest=SuggesterTest

# Run with verbose output
mvn surefire:test -Dmaven.surefire.debug=true
```

### Running Tests with Coverage

```bash

    assertSame(refreshKey, map.get(refreshKey));

    new Thread() {
      @Override
      public void run() {
        cache.getUnchecked(getKey);
        getFinishedSignal.countDown();
      }
    }.start();
    new Thread() {
      @Override
      public void run() {
        cache.refresh(refreshKey);
        getFinishedSignal.countDown();
      }
    }.start();

/** Replacements for JUnit's {@code assertThrows} that work under GWT/J2CL. */
@GwtCompatible
@NullMarked
final class ReflectionFreeAssertThrows {
  interface ThrowingRunnable {
    void run() throws Throwable;
  }

  interface ThrowingSupplier {
    @Nullable Object get() throws Throwable;
  }

  @CanIgnoreReturnValue
  static <T extends Throwable> T assertThrows(

				t.Fatal(err)
			}
			if err := w.Close(); err != nil {
				t.Fatal(err)
			}
		}
	}
	t.Run("uint32max-2_NoZip64", func(t *testing.T) {
		t.Parallel()
		if generatesZip64(t, gen(0xfffffffe)) {
			t.Error("unexpected zip64")
		}
	})
	t.Run("uint32max-1_Zip64", func(t *testing.T) {
		t.Parallel()
		if !generatesZip64(t, gen(0xffffffff)) {
			t.Error("expected zip64")
		}

		},
		{
			//  2MiB > 1MiB -> in range
			objSize: 2 << 20,
			sizeFilter: BatchJobSizeFilter{
				LowerBound: 1 << 20,
			},
			want: true,
		},
	}

	for i, test := range tests {
		t.Run(fmt.Sprintf("test-%d", i+1), func(t *testing.T) {
			if got := test.sizeFilter.InRange(test.objSize); got != test.want {
				t.Fatalf("Expected %v but got %v", test.want, got)
			}
		})
	}
}

						{ForeignKey: "OwnerType", ForeignSchema: "Toy", PrimaryValue: "users"},
					},
				},
			},
		},
	})
}

func TestPolymorphic(t *testing.T) {
	t.Run("has one", func(t *testing.T) {
		type Toy struct {
			ID        int
			Name      string
			OwnerID   int
			OwnerType string
		}

		type Cat struct {
			ID   int
			Name string

				"Resource": ["arn:minio:kms:::non-matching-key-name"] }`,

			wantStatusCode: http.StatusForbidden,
			wantResp:       []string{"AccessDenied"},
		},
	}
	for testNum, test := range tests {
		t.Run(fmt.Sprintf("%d %s", testNum+1, test.name), func(t *testing.T) {
			execKMSTest(t, test, adminTestBed)
		})
	}
}

func TestKMSHandlersKeyStatus(t *testing.T) {
	adminTestBed, tearDown := setupKMSTest(t, true)

			t.Fatalf("Write() = %v, want %v", err, ErrWriteTooLong)
		}
	})

	t.Run("NegativeSize", func(t *testing.T) {
		tw := NewWriter(new(bytes.Buffer))
		hdr := &Header{Name: "small.txt", Size: -1}
		if err := tw.WriteHeader(hdr); err == nil {
			t.Fatalf("WriteHeader() = nil, want non-nil error")
		}
	})

	t.Run("BeforeHeader", func(t *testing.T) {
		tw := NewWriter(new(bytes.Buffer))

## **4. Run Sample Applications**

After installing Hive, Hadoop and Spark successfully, we can now proceed to run some sample applications to see if they are configured appropriately.  We can use Spark Pi and Spark WordCount programs to validate our Spark installation. We can also explore how to run Spark jobs from the command line and Spark shell.

### **4.1 Spark Pi**

    // Give the second task a chance to (incorrectly) start up while the first task is running.
    assertThat(future2.isDone()).isFalse();

    // Stop the first task. The second task should then run.
    blockingCallable.stop();
    executor.shutdown();
    assertThat(executor.awaitTermination(10, SECONDS)).isTrue();
    assertThat(getDone(future2)).isFalse();
  }