LibJS/test-js: Clean up test-js code

This commit also exposes JSONObject's implementation of stringify to the
public, so that it can be used by test-js without having to go through
the interpreter's environment.

Libraries/LibJS/Tests/run-tests.sh

@@ -11,16 +11,6 @@ else
     export UBSAN_OPTIONS=print_stacktrace=1
 fi
 
-# FIXME: Support "find -name" in Serenity to remove the file name checks below
-test_files_tmp=$(find . -type f | cut -b 3- | sort)
-
-for f in $test_files_tmp; do
-    if [ "$f" = "test-common.js" ] || [ "$f" = "run-tests.sh" ]; then
-        continue
-    fi
-    test_files=("${test_files[@]}" "$f");
-done
-
-$js_program "$test_root" "${test_files[@]}"
+$js_program "$test_root"
 
 exit $!

Libraries/LibJS/Tests/test-common.js

@@ -425,7 +425,7 @@ describe = (message, callback) => {
     suiteMessage = defaultSuiteMessage;
 }
 
-test = (message, callback) => {
+const getTestFunction = successMessage => (message, callback) => {
     if (!__TestResults__[suiteMessage])
         __TestResults__[suiteMessage] = {};
 
@@ -437,13 +437,15 @@ test = (message, callback) => {
     try {
         callback();
         suite[message] = {
-            passed: true,
+            result: successMessage,
         };
     } catch (e) {
         suite[message] = {
-            passed: false,
+            result: "fail",
         };
     }
 }
 
+test = getTestFunction("pass");
+
 })();