test(event): rest api for number assessment events

#2236

Author: jo-elimu

src/test/java/ai/elimu/rest/v2/analytics/NumberAssessmentEventsRestControllerTest.java

@@ -0,0 +1,58 @@
+package ai.elimu.rest.v2.analytics;
+
+import org.json.JSONObject;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.springframework.mock.web.MockMultipartFile;
+import org.springframework.web.multipart.MultipartFile;
+
+import jakarta.servlet.http.HttpServletResponse;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.Mockito.*;
+
+public class NumberAssessmentEventsRestControllerTest {
+
+    @InjectMocks
+    private NumberAssessmentEventsRestController numberAssessmentEventsRestController;
+
+    @Mock
+    private HttpServletResponse response;
+
+    @BeforeEach
+    public void setUp() {
+        MockitoAnnotations.openMocks(this);
+    }
+
+    @Test
+    public void testHandleUploadCsvRequest_invalidFilename() {
+        MultipartFile multipartFile = new MockMultipartFile(
+                "file",
+                "invalid_filename.csv",
+                "text/csv",
+                "test content".getBytes()
+        );
+        String jsonResponse = numberAssessmentEventsRestController.handleUploadCsvRequest(multipartFile, response);
+        JSONObject jsonObject = new JSONObject(jsonResponse);
+        assertEquals("error", jsonObject.getString("result"));
+        assertEquals("Unexpected filename", jsonObject.getString("errorMessage"));
+        verify(response).setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+    }
+
+    @Test
+    public void testHandleUploadCsvRequest_emptyFile() {
+        MultipartFile multipartFile = new MockMultipartFile(
+                "file",
+                "7161a85a0e4751cd_4000022_number-assessment-events_2025-07-01.csv",
+                "text/csv",
+                "".getBytes()
+        );
+        String jsonResponse = numberAssessmentEventsRestController.handleUploadCsvRequest(multipartFile, response);
+        JSONObject jsonObject = new JSONObject(jsonResponse);
+        assertEquals("error", jsonObject.getString("result"));
+        assertEquals("Empty file", jsonObject.getString("errorMessage"));
+        verify(response).setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+    }
+}