CustomErrorController.java

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package edu.ucsb.cs156.courses.controllers;
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import jakarta.servlet.RequestDispatcher;
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import jakarta.servlet.http.HttpServletRequest;
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import jakarta.servlet.http.HttpServletResponse;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.boot.autoconfigure.web.ServerProperties;
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import org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController;
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import org.springframework.boot.web.servlet.error.ErrorAttributes;
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import org.springframework.http.HttpStatus;
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import org.springframework.stereotype.Controller;
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import org.springframework.ui.ModelMap;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.servlet.ModelAndView;
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/**
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 * Custom error controller that replaces the default white label error page with a more
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 * user-friendly error page.
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 */
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@Controller
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@Slf4j
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public class CustomErrorController extends BasicErrorController {
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  public CustomErrorController(ErrorAttributes errorAttributes, ServerProperties properties) {
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    super(errorAttributes, properties.getError());
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  }
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  /**
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   * Handles error requests and returns a custom error page.
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   *
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   * @param request the HTTP request
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   * @param response the HTTP response
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   * @return the name of the error view template
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   */
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  @RequestMapping(produces = "text/html")
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  @Override
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  public ModelAndView errorHtml(HttpServletRequest request, HttpServletResponse response) {
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    // Get error status
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    Object status = request.getAttribute(RequestDispatcher.ERROR_STATUS_CODE);
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    int statusCode = 500; // Default to internal server error
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43 1 1. errorHtml : negated conditional → KILLED
 
    if (status != null) {
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      statusCode = Integer.parseInt(status.toString());
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    }
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    // Get error message
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    String errorMessage = "An unexpected error occurred";
49 1 1. errorHtml : negated conditional → KILLED
 
    if (statusCode == 404) {
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      errorMessage =
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          "The page you are looking for might have been removed or is temporarily unavailable";
52 1 1. errorHtml : negated conditional → KILLED
 
    } else if (statusCode == 403) {
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      errorMessage = "You don't have permission to access this resource";
54 1 1. errorHtml : negated conditional → KILLED
 
    } else if (statusCode == 500) {
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      errorMessage = "We're sorry, something went wrong on our end";
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    }
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    // Get exception details for debugging
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    Throwable throwable = (Throwable) request.getAttribute(RequestDispatcher.ERROR_EXCEPTION);
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    String exceptionMessage =
61 1 1. errorHtml : negated conditional → KILLED
 
        throwable != null ? throwable.getMessage() : "No exception details available";
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    // Get stack trace
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    String stackTrace = "";
65 1 1. errorHtml : negated conditional → KILLED
 
    if (throwable != null) {
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      for (StackTraceElement element : throwable.getStackTrace()) {
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        stackTrace += element.toString() + "\n";
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      }
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    }
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    ModelMap model = new ModelMap();
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    // Add attributes to the model
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    model.addAttribute("status", statusCode);
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    model.addAttribute("error", HttpStatus.valueOf(statusCode).getReasonPhrase());
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    model.addAttribute("message", errorMessage);
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    model.addAttribute("exceptionMessage", exceptionMessage);
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    model.addAttribute("stackTrace", stackTrace);
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    model.addAttribute("timestamp", java.time.LocalDateTime.now());
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    model.addAttribute("path", request.getAttribute(RequestDispatcher.ERROR_REQUEST_URI));
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82 1 1. errorHtml : replaced return value with null for edu/ucsb/cs156/courses/controllers/CustomErrorController::errorHtml → KILLED
 
    return new ModelAndView("error", model);
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  }
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}

Mutations

43

1.1
Location : errorHtml
Killed by : edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests.[engine:junit-jupiter]/[class:edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests]/[method:testHandleError_NoStatusCode()] negated conditional → KILLED

49

1.1
Location : errorHtml
Killed by : edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests.[engine:junit-jupiter]/[class:edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests]/[method:testHandleError_404()] negated conditional → KILLED

52

1.1
Location : errorHtml
Killed by : edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests.[engine:junit-jupiter]/[class:edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests]/[method:testHandleError_DefaultStatus()] negated conditional → KILLED

54

1.1
Location : errorHtml
Killed by : edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests.[engine:junit-jupiter]/[class:edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests]/[method:testHandleError_DefaultStatus()] negated conditional → KILLED

61

1.1
Location : errorHtml
Killed by : edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests.[engine:junit-jupiter]/[class:edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests]/[method:testHandleError_NoStatusCode()] negated conditional → KILLED

65

1.1
Location : errorHtml
Killed by : edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests.[engine:junit-jupiter]/[class:edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests]/[method:testHandleError_NoStatusCode()] negated conditional → KILLED

82

1.1
Location : errorHtml
Killed by : edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests.[engine:junit-jupiter]/[class:edu.ucsb.cs156.courses.controllers.CustomErrorControllerTests]/[method:testHandleError_NoStatusCode()] replaced return value with null for edu/ucsb/cs156/courses/controllers/CustomErrorController::errorHtml → KILLED

Active mutators

Tests examined


Report generated by PIT 1.17.0