Add testing harness

scripts/test.js

@@ -0,0 +1,31 @@
+/* Tests for prosperon */
+
+var tests = [];
+var pass = 0;
+var fail = 0;
+
+var test = function(name, fn)
+{
+  tests.push(function() {
+    print(`${pass+fail}/${tests.length}: ${name} ... `);
+    var result = fn();
+    if (result) print(`pass`);
+    else print(`fail`);
+    return result;
+  });
+}
+
+test("Pass test", _=>1);
+test("Fail test", _=>0);
+
+say(`Testing ${tests.length} tests.`);
+for (var t of tests) {
+  if (t())
+    pass++;
+  else
+    fail++;
+  print("\n");
+}
+
+say(`Passed ${pass} tests and failed ${fail}`);
+Game.quit();