HttpClient 4.0 java tests (#7912)

Converts apache-httpclient-4.0 unit tests in java. Version 4.0 was using
GuardedBy annotation which was interfering with the test cases, hence
the library version was shifted to 4.1.
#7195

instrumentation/apache-httpclient/apache-httpclient-4.0/javaagent/build.gradle.kts

@@ -25,4 +25,5 @@ muzzle {
 
 dependencies {
   library("org.apache.httpcomponents:httpclient:4.0")
+  testCompileOnly("net.jcip:jcip-annotations:1.0")
 }

instrumentation/apache-httpclient/apache-httpclient-4.0/javaagent/src/test/java/io/opentelemetry/javaagent/instrumentation/apachehttpclient/v4_0/AbstractApacheHttpClientTest.java

@@ -0,0 +1,103 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.javaagent.instrumentation.apachehttpclient.v4_0;
+
+import io.opentelemetry.api.common.AttributeKey;
+import io.opentelemetry.instrumentation.testing.junit.http.AbstractHttpClientTest;
+import io.opentelemetry.instrumentation.testing.junit.http.HttpClientResult;
+import io.opentelemetry.instrumentation.testing.junit.http.HttpClientTestOptions;
+import java.net.URI;
+import java.util.Map;
+import java.util.Set;
+import org.apache.http.HttpHost;
+import org.apache.http.HttpRequest;
+import org.apache.http.HttpResponse;
+import org.apache.http.protocol.BasicHttpContext;
+import org.apache.http.protocol.HttpContext;
+
+abstract class AbstractApacheHttpClientTest<T extends HttpRequest>
+    extends AbstractHttpClientTest<T> {
+  @Override
+  protected String userAgent() {
+    return "apachehttpclient";
+  }
+
+  @Override
+  protected void configure(HttpClientTestOptions.Builder optionsBuilder) {
+    optionsBuilder.setUserAgent(userAgent());
+    optionsBuilder.enableTestReadTimeout();
+    optionsBuilder.setHttpAttributes(AbstractApacheHttpClientTest::getHttpAttributes);
+  }
+
+  private static Set<AttributeKey<?>> getHttpAttributes(URI endpoint) {
+    return HttpClientTestOptions.DEFAULT_HTTP_ATTRIBUTES;
+  }
+
+  @Override
+  public T buildRequest(String method, URI uri, Map<String, String> headers) {
+    T request = createRequest(method, uri);
+    request.addHeader("user-agent", userAgent());
+    headers.forEach(request::setHeader);
+    return request;
+  }
+
+  @Override
+  public int sendRequest(T request, String method, URI uri, Map<String, String> headers)
+      throws Exception {
+    return getResponseCode(executeRequest(request, uri));
+  }
+
+  @Override
+  public void sendRequestWithCallback(
+      T request,
+      String method,
+      URI uri,
+      Map<String, String> headers,
+      HttpClientResult requestResult) {
+    try {
+      executeRequestWithCallback(request, uri, requestResult);
+    } catch (Throwable throwable) {
+      requestResult.complete(throwable);
+    }
+  }
+
+  protected HttpHost getHost(URI uri) {
+    return new HttpHost(uri.getHost(), uri.getPort(), uri.getScheme());
+  }
+
+  protected HttpContext getContext() {
+    return new BasicHttpContext();
+  }
+
+  protected static String fullPathFromUri(URI uri) {
+    StringBuilder builder = new StringBuilder();
+    if (uri.getPath() != null) {
+      builder.append(uri.getPath());
+    }
+
+    if (uri.getQuery() != null) {
+      builder.append('?');
+      builder.append(uri.getQuery());
+    }
+
+    if (uri.getFragment() != null) {
+      builder.append('#');
+      builder.append(uri.getFragment());
+    }
+    return builder.toString();
+  }
+
+  abstract T createRequest(String method, URI uri);
+
+  abstract HttpResponse executeRequest(T request, URI uri) throws Exception;
+
+  abstract void executeRequestWithCallback(T request, URI uri, HttpClientResult requestResult)
+      throws Exception;
+
+  private static int getResponseCode(HttpResponse response) {
+    return response.getStatusLine().getStatusCode();
+  }
+}