使用Mockito进行Java HttpClient单元测试

import org.junit.jupiter.api.Test;
import org.mockito.Mockito;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.when;
import static org.junit.jupiter.api.Assertions.assertEquals;

public class HttpClientTest {

    @Test
    public void testSendGetRequest() throws Exception {
        // 创建模拟的 HttpClient
        HttpClient httpClient = Mockito.mock(HttpClient.class);
        
        // 创建模拟的 HttpRequest
        HttpRequest request = HttpRequest.newBuilder()
                .uri(new URI("http://example.com"))
                .build();
        
        // 创建模拟的 HttpResponse
        HttpResponse<String> response = HttpResponse.BodyHandlers.ofString()
                .build();
        response.statusCode(200);
        response.body("Hello, World!");
        
        // 配置模拟的 HttpClient 行为
        when(httpClient.send(any(HttpRequest.class), any(HttpResponse.BodyHandler.class)))
                .thenReturn(response);
        
        // 调用被测试的方法
        MyClass myClass = new MyClass(httpClient);
        String result = myClass.sendGetRequest(request);
        
        // 验证结果
        assertEquals("Hello, World!", result);
    }
}

class MyClass {
    private final HttpClient httpClient;

    public MyClass(HttpClient httpClient) {
        this.httpClient = httpClient;
    }

    public String sendGetRequest(HttpRequest request) throws Exception {
        HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
        return response.body();
    }
}