Convert khttp test to java (#2180)

instrumentation/khttp/src/test/groovy/com/splunk/opentelemetry/instrumentation/khttp/KHttpClientTest.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright Splunk Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.splunk.opentelemetry.instrumentation.khttp;
+
+import io.opentelemetry.api.common.AttributeKey;
+import io.opentelemetry.instrumentation.testing.junit.InstrumentationExtension;
+import io.opentelemetry.instrumentation.testing.junit.http.AbstractHttpClientTest;
+import io.opentelemetry.instrumentation.testing.junit.http.HttpClientInstrumentationExtension;
+import io.opentelemetry.instrumentation.testing.junit.http.HttpClientTestOptions;
+import java.net.URI;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import khttp.KHttp;
+import khttp.responses.Response;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+class KHttpClientTest extends AbstractHttpClientTest<Void> {
+
+  @RegisterExtension
+  static final InstrumentationExtension testing = HttpClientInstrumentationExtension.forAgent();
+
+  @Override
+  protected void configure(HttpClientTestOptions.Builder optionsBuilder) {
+    super.configure(optionsBuilder);
+
+    optionsBuilder.disableTestCircularRedirects();
+    // these tests will pass, but they don't really test anything since REQUEST is Void
+    optionsBuilder.disableTestReusedRequest();
+    optionsBuilder.disableTestCallback();
+    optionsBuilder.setHttpAttributes(
+        uri -> {
+          Set<AttributeKey<?>> attributes =
+              new HashSet<>(HttpClientTestOptions.DEFAULT_HTTP_ATTRIBUTES);
+          attributes.remove(AttributeKey.stringKey("network.protocol.version"));
+          return attributes;
+        });
+    optionsBuilder.spanEndsAfterBody();
+  }
+
+  @Override
+  public Void buildRequest(String method, URI uri, Map<String, String> headers) {
+    return null;
+  }
+
+  @Override
+  public int sendRequest(Void request, String method, URI uri, Map<String, String> headers) {
+    // khttp applies the same timeout for both connect and read
+    long timeoutSeconds = CONNECTION_TIMEOUT.toSeconds();
+    Response response =
+        KHttp.request(
+            method,
+            uri.toString(),
+            headers,
+            Collections.emptyMap(),
+            null,
+            null,
+            null,
+            null,
+            timeoutSeconds);
+    return response.getStatusCode();
+  }
+}