🎨 新增okhttp实现接口请求的单例模式代码

weixin-java-common/src/test/java/me/chanjar/weixin/common/util/http/okhttp/DefaultOkHttpClientBuilderTest.java

@@ -0,0 +1,66 @@
+package me.chanjar.weixin.common.util.http.okhttp;
+
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+import org.testng.Assert;
+import org.testng.annotations.Test;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class DefaultOkHttpClientBuilderTest {
+  @Test
+  public void testBuild() throws Exception {
+    DefaultOkHttpClientBuilder builder1 = DefaultOkHttpClientBuilder.get();
+    DefaultOkHttpClientBuilder builder2 = DefaultOkHttpClientBuilder.get();
+    Assert.assertSame(builder1, builder2, "DefaultOkHttpClientBuilder为单例,获取到的对象应该相同");
+    List<DefaultOkHttpClientBuilderTest.TestThread> threadList = new ArrayList<>(10);
+    for (int i = 0; i < 10; i++) {
+      DefaultOkHttpClientBuilderTest.TestThread thread = new DefaultOkHttpClientBuilderTest.TestThread();
+      thread.start();
+      threadList.add(thread);
+    }
+    for (DefaultOkHttpClientBuilderTest.TestThread testThread : threadList) {
+      testThread.join();
+      Assert.assertNotEquals(-1, testThread.getRespState(), "请求响应code不应为-1");
+    }
+
+    for (int i = 1; i < threadList.size(); i++) {
+      DefaultOkHttpClientBuilderTest.TestThread thread1 = threadList.get(i - 1);
+      DefaultOkHttpClientBuilderTest.TestThread thread2 = threadList.get(i);
+      Assert.assertSame(
+        thread1.getClient(),
+        thread2.getClient(),
+        "DefaultOkHttpClientBuilderTest为单例,并持有了相同的OkHttpClient"
+      );
+    }
+  }
+
+  public static class TestThread extends Thread {
+    private OkHttpClient client;
+    private int respState = -1;
+
+    @Override
+    public void run() {
+      client = DefaultOkHttpClientBuilder.get().build();
+      Request request = new Request.Builder()
+        .url("http://www.sina.com.cn/")
+        .build();
+      try (Response response = client.newCall(request).execute()) {
+        respState = response.code();
+      } catch (IOException e) {
+        // ignore
+      }
+    }
+
+    public OkHttpClient getClient() {
+      return client;
+    }
+
+    public int getRespState() {
+      return respState;
+    }
+  }
+}