[#12048] Migrate tests for JsonResultTest

src/main/java/teammates/ui/webapi/JsonResult.java

@@ -26,18 +26,18 @@ public class JsonResult extends ActionResult {
     private final ApiOutput output;
     private List<Cookie> cookies;
 
-    JsonResult(ApiOutput output) {
+    public JsonResult(ApiOutput output) {
         super(HttpStatus.SC_OK);
         this.output = output;
         this.cookies = new ArrayList<>();
     }
 
-    JsonResult(ApiOutput output, List<Cookie> cookies) {
+    public JsonResult(ApiOutput output, List<Cookie> cookies) {
         this(output);
         this.cookies = cookies;
     }
 
-    JsonResult(String message) {
+    public JsonResult(String message) {
         this(message, HttpStatus.SC_OK);
     }
 
@@ -64,7 +64,7 @@ public void send(HttpServletResponse resp) throws IOException {
         JsonUtils.toCompactJson(output, pw);
     }
 
-    List<Cookie> getCookies() {
+    public List<Cookie> getCookies() {
         return cookies;
     }
 

src/test/java/teammates/sqlui/webapi/JsonResultTest.java

@@ -0,0 +1,84 @@
+package teammates.sqlui.webapi;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import jakarta.servlet.http.Cookie;
+
+import org.testng.annotations.Test;
+
+import teammates.test.BaseTestCase;
+import teammates.test.MockHttpServletResponse;
+import teammates.ui.output.MessageOutput;
+import teammates.ui.webapi.JsonResult;
+
+/**
+ * SUT: {@link JsonResult}.
+ */
+public class JsonResultTest extends BaseTestCase {
+    private static final String MESSAGE = "output message";
+    private static final String EMPTY_MESSAGE = "";
+    private final MessageOutput messageOutput = new MessageOutput(MESSAGE);
+    private final MessageOutput emptyMessageOutput = new MessageOutput(EMPTY_MESSAGE);
+    private final List<Cookie> cookies = new ArrayList<>();
+    private final List<Cookie> emptyCookies = new ArrayList<>();
+    private final Cookie testCookie = new Cookie("cookieName", "cookieValue");
+
+    @Test
+    public void testConstructor_sendStringMessageReceivesMessage_shouldSucceed() throws Exception {
+        JsonResult result = new JsonResult(MESSAGE);
+        verifyJsonResult(result, MESSAGE, 0, 0);
+    }
+
+    @Test
+    public void testConstructor_sendMessageOutputReceivesMessage_shouldSucceed() throws Exception {
+        JsonResult result = new JsonResult(messageOutput);
+        verifyJsonResult(result, MESSAGE, 0, 0);
+    }
+
+    @Test
+    public void testConstructor_sendMessageOutputCookieReceiveMessageAndCookies_shouldSucceed() throws Exception {
+        cookies.add(testCookie);
+        JsonResult result = new JsonResult(messageOutput, cookies);
+        verifyJsonResult(result, MESSAGE, 1, 1);
+    }
+
+    @Test
+    public void testConstructor_emptyMessageAndCookie_shouldSucceed() throws Exception {
+        JsonResult result = new JsonResult(emptyMessageOutput, emptyCookies);
+        verifyJsonResult(result, EMPTY_MESSAGE, 0, 0);
+    }
+
+    @Test
+    public void testConstructor_sendNullMessage_shouldGetNullAndFailResponse() {
+        JsonResult result = new JsonResult((String) null);
+        MessageOutput output = (MessageOutput) result.getOutput();
+        assertEquals(null, output.getMessage());
+
+        result = new JsonResult((MessageOutput) null);
+        output = (MessageOutput) result.getOutput();
+        assertEquals(null, output);
+
+        JsonResult nullTestJsonResult = new JsonResult((MessageOutput) null, (List<Cookie>) null);
+        output = (MessageOutput) nullTestJsonResult.getOutput();
+        assertEquals(null, output);
+        assertEquals(null, nullTestJsonResult.getCookies());
+
+        MockHttpServletResponse resp = new MockHttpServletResponse();
+        assertThrows(NullPointerException.class, () -> nullTestJsonResult.send(resp));
+    }
+
+    private void verifyJsonResult(
+            JsonResult result,
+            String expectedMessage,
+            int expectedMessageCookieSize,
+            int expectedResponseCookieSize) throws Exception {
+        MessageOutput output = (MessageOutput) result.getOutput();
+        assertEquals(expectedMessage, output.getMessage());
+        assertEquals(expectedMessageCookieSize, result.getCookies().size());
+
+        MockHttpServletResponse resp = new MockHttpServletResponse();
+        result.send(resp);
+        assertEquals(expectedResponseCookieSize, resp.getCookies().size());
+    }
+}