Write Assessments for Script-Based Learner Solutions

For script-based solutions, you can easily create the most common assessments without writing code. Create an assessment by selecting the Test Type and specifying the solution code you are testing:

  • Variable Equals Reference Solution — Check whether a variable in the learner solution equals the same variable in the reference solution within tolerance.

  • Function or Keyword Is Present — Check for the presence of specific functions or keywords in the learner solution.

  • Function or Keyword Is Absent — Check that certain functions or keywords are not present in the learner solution.

  • MATLAB Code — Write the assessment using MATLAB® code.

The code behind the first three actions uses the same assessment functions as the functions used to check a function-based solution. You can click Convert test to code to see the code.

Execution Model

  • When the learner submits a script-based solution for assessment, both the learner solution and the reference solution are run first. Your assessments then evaluate the learner solution.

  • Each assessment runs sequentially and independently of the other assessments. If one assessment fails, the subsequent assessments still run.

  • Variables created in one assessment are not available in the next one. Define all the required variables in each assessment.

  • An assessment can refer to variables in the reference solution by referring to referenceVariables.variable_name in your code.

  • If code terminates without errors, the assessment result shows a passed status. Otherwise, the assessment results show a failed status.

    If the test is a pretest, the learner can view information about the assessment test by clicking the arrow to the left of the test name, regardless of whether the test passed or failed.

Examples

The Fibonacci Sequence and For Loops

In this example, learners are asked to write a script that generates the first 50 values in the Fibonacci sequence, placing the result in the vector x. The learner should use a for loop.

Reference Solution

% Initialize x as a row vector of zeros 
x = zeros(1,50);

% Assign the first two elements of x to contain the first two values
% of the Fibonacci sequence
x(1) = 1;
x(2) = 1;

% Write a FOR loop to compute the remaining values 
for i = 3:50
    x(i) = x(i-1)+x(i-2);
end
% The statement below will print out the first five values of x. 
disp(x(1:5))

Assessment Tests

  • Test 1: Check whether the learner solution uses a for loop:

  • Test 2: Check whether vector x has the correct value:

Related Topics

MATLAB Grader Documentation

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