在Spring Boot中整合Thymeleaf进行单元测试，可以使用Spring Boot Test和Thymeleaf Test库。下面是一个简单的示例，展示了如何编写针对Thymeleaf模板的单元测试：

1. 添加依赖

在pom.xml文件中添加以下依赖：

    org.springframework.boot
    spring-boot-starter-test
    test


    org.thymeleaf
    thymeleaf-testing
    3.0.12.RELEASE
    test

2. 创建Thymeleaf模板

在src/main/resources/templates目录下创建一个名为example.html的Thymeleaf模板文件：

    


    
Hello, World!

3. 编写单元测试

在src/test/java目录下创建一个名为ExampleTemplateTest.java的测试类：

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.web.client.TestRestTemplate;
import org.springframework.boot.web.server.LocalServerPort;
import org.springframework.http.ResponseEntity;
import org.springframework.test.context.TestPropertySource;
import org.thymeleaf.testing.templateengine.context.web.SpringWebProcessingContextBuilder;
import org.thymeleaf.testing.templateengine.engine.TestExecutor;
import org.thymeleaf.testing.templateengine.report.ConsoleTestReporter;
import org.thymeleaf.testing.templateengine.resource.ClassPathTemplateResource;
import org.thymeleaf.testing.templateengine.testable.ITest;
import org.thymeleaf.testing.templateengine.testable.ITestSequence;
import org.thymeleaf.testing.templateengine.testable.Test;

import java.util.Collections;

import static org.assertj.core.api.Assertions.assertThat;

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
@TestPropertySource(properties = {
        "spring.thymeleaf.prefix=classpath:/templates/"
})
public class ExampleTemplateTest {

    @LocalServerPort
    private int port;

    @Autowired
    private TestRestTemplate restTemplate;

    @Test
    public void testExampleTemplate() {
        // 创建测试序列
        ITestSequence testSequence = new TestSequence(
                new Test("Example Test",
                        new ClassPathTemplateResource("templates/example.html", null),
                        Collections.singletonMap("message", "Hello, Thymeleaf!"),
                        (context, result) -> {
                            assertThat(result.getRenderedOutput())
                                    .contains("
Hello, Thymeleaf!
");
                        })
        );

        // 创建测试执行器
        TestExecutor testExecutor = new TestExecutor();
        testExecutor.setProcessingContextBuilder(new SpringWebProcessingContextBuilder());
        testExecutor.setReporter(new ConsoleTestReporter());

        // 执行测试序列
        testExecutor.executeTestSequence(testSequence);
    }
}

4. 运行测试

在IDE中运行ExampleTemplateTest类，或者使用Maven命令行工具运行：

mvn test

这将执行单元测试，并验证Thymeleaf模板的输出是否符合预期。