* See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.sse.internal

import assertk.assertThat
import assertk.assertions.isEmpty
import assertk.assertions.isEqualTo
import assertk.assertions.isNull
import java.util.concurrent.LinkedBlockingDeque
import java.util.concurrent.TimeUnit
import okhttp3.Response
import okhttp3.internal.platform.Platform

 * limitations under the License.
 *
 */
package okhttp.android.test

import assertk.all
import assertk.assertFailure
import assertk.assertions.cause
import assertk.assertions.hasClass
import assertk.assertions.hasMessage
import assertk.assertions.isNotNull
import java.io.IOException
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.internal.platform.Platform

 * limitations under the License.
 */
package okhttp3.internal.http

import assertk.assertThat
import assertk.assertions.isEqualTo
import assertk.assertions.isInstanceOf
import assertk.assertions.isNotNull
import assertk.fail
import java.io.IOException
import java.net.ServerSocket
import java.net.Socket
import java.net.SocketException

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.junit.jupiter.api.Test;

import java.util.concurrent.CompletableFuture;

import static org.junit.jupiter.api.Assertions.assertEquals;

public class EventSourceFactoryTest {

  @StartStop
  private final MockWebServer server = new MockWebServer();

  @Test
  public void testEventSourceFactory() throws Exception {

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.sse.internal

import assertk.assertThat
import assertk.assertions.containsExactly
import assertk.assertions.isEqualTo
import java.util.concurrent.TimeUnit
import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import mockwebserver3.junit5.StartStop
import okhttp3.Headers

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.sse.internal

import assertk.assertThat
import assertk.assertions.isEqualTo
import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import mockwebserver3.junit5.StartStop
import okhttp3.Headers
import okhttp3.OkHttpClientTestRule
import okhttp3.Request

}
```

## 🏗️ Architecture & Design Patterns

### Core Design Principles
CoreLib follows a **utility-class pattern** where most functionality is exposed through static methods:

- **Assertion-based validation** - All methods validate inputs using `AssertionUtil.assertArgumentNotNull()` and `AssertionUtil.assertArgumentNotEmpty()`