Run autograder test cases and write Gradescope-compatible JSON

Iterates over test_cases, calls each test function, compares the return value to the expected value, accumulates scores, and writes the results to a JSON file that Gradescope can parse. Also prints a summary to the console when verbose = TRUE.

Usage

run_autograder(test_cases, json_path = .autograder_json_path(), verbose = TRUE)

Arguments

test_cases

A list of test-case lists. Each entry must contain:

name

Human-readable criterion label shown to students.

fun

The test function: a function object or a character string naming a function visible in the calling environment.

args

A list of arguments passed to fun via do.call.

expect

Expected return value; compared via .ag_to_string().

visibility

"visible" (default) or "hidden".

weight

Point value for this criterion.

json_path

Output path for the JSON results file. Defaults to "/autograder/results/results.json" inside a Gradescope container and "results.json" otherwise (detected via the ASSIGNMENT_TITLE environment variable).

verbose

Logical. Print per-test summaries to the console. Default TRUE.

Value

The results list, invisibly.