1 files changed, 23 insertions, 0 deletions
diff --git a/test/asserts.js b/test/asserts.js
new file mode 100644
index 00000000..6ef3033a
--- /dev/null
+++ b/test/asserts.js
@@ -0,0 +1,23 @@
+function assert(x, msg) {
+	const mymsg = msg ? ": " + msg : "";
+	if (!x)
+		throw new TypeError("Assertion failed" + mymsg);
+}
+
+function assert_throws(expr, error) {
+	try {
+		eval(expr);
+	} catch (e) {
+		if (e instanceof Error)
+			return;
+	}
+	throw new TypeError("Assertion failed");
+}
+
+function assert_equals(a, b) {
+	assert(a === b, "Expected " + b + " but got " + a);
+}
+
+function assert_instanceof(a, b) {
+	assert(a instanceof b, a + " not an instance of " + b);
+}