add unit test for email service (#146)

src/main/java/com/fjb/sunrise/services/impl/ReCaptchaServiceImpl.java

@@ -15,18 +15,19 @@ public class ReCaptchaServiceImpl implements ReCaptchaService {
     @Value("${default.captcha-enable}")
     private String captchaEnable;
 
+    private final RestTemplate restTemplate = new RestTemplate();
+
     private static final String URL = "https://www.google.com/recaptcha/api/siteverify";
 
     @Override
     public boolean validateRecaptcha(String recaptchaResponse) {
         if (captchaEnable.equals("false")) {
             return true;
         }
-        RestTemplate restTemplate = new RestTemplate();
         String url = URL + "?secret=" + recaptchaSecretKey + "&response=" + recaptchaResponse;
         String response = restTemplate.postForObject(url, null, String.class);
         assert response != null;
         JsonObject jsonObject = JsonParser.parseString(response).getAsJsonObject();
         return jsonObject.get("success").getAsBoolean();
     }
-}
+}

src/test/java/com/fjb/sunrise/services/ReCaptchaServiceTest.java

@@ -0,0 +1,68 @@
+package com.fjb.sunrise.services;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+import org.springframework.test.util.ReflectionTestUtils;
+import org.springframework.web.client.RestTemplate;
+
+@ExtendWith(SpringExtension.class)
+@SpringBootTest
+class ReCaptchaServiceTest {
+    @MockBean
+    private RestTemplate restTemplate;
+    @Autowired
+    private ReCaptchaService recaptchaService;
+
+    @Value("${default.recaptcha-secret-key}")
+    private String siteKey;
+    @Test
+    void validateRecaptcha_whenCaptchaDisabled_ThenReturnTrue() {
+        ReflectionTestUtils.setField(recaptchaService, "captchaEnable", "false");
+
+        boolean result = recaptchaService.validateRecaptcha("any-response");
+        Assertions.assertTrue(result);
+    }
+
+    @Test
+    void validateRecaptcha_whenCaptchaEnabledAndValidResponse_ThenReturnTrue() {
+        ReflectionTestUtils.setField(recaptchaService, "captchaEnable", "true");
+        ReflectionTestUtils.setField(recaptchaService, "recaptchaSecretKey", siteKey);
+        ReflectionTestUtils.setField(recaptchaService, "restTemplate", restTemplate);
+
+        String recaptchaResponse = "valid-response";
+        String mockApiResponse = "{\"success\": true}";
+        Mockito.when(restTemplate.postForObject(Mockito.anyString(), Mockito.isNull(), Mockito.eq(String.class)))
+            .thenReturn(mockApiResponse);
+
+        boolean result = recaptchaService.validateRecaptcha(recaptchaResponse);
+
+        Assertions.assertTrue(result);
+    }
+
+    @Test
+    void validateRecaptcha_whenCaptchaEnabledAndInvalidResponse_ThenReturnFalse() {
+        ReflectionTestUtils.setField(recaptchaService, "captchaEnable", "true");
+
+        String recaptchaResponse = "invalid-response";
+        String mockApiResponse = "{\"success\": false}";
+
+        Mockito.when(restTemplate.postForObject(Mockito.anyString(), Mockito.isNull(), Mockito.eq(String.class)))
+            .thenReturn(mockApiResponse);
+
+        boolean result = recaptchaService.validateRecaptcha(recaptchaResponse);
+
+        Assertions.assertFalse(result);
+    }
+}