From fa4c3375705d6bf0bd4e72e0f88d3454e95cc664 Mon Sep 17 00:00:00 2001
From: Domenic Denicola <d@domenic.me>
Date: Wed, 3 Dec 2014 18:29:52 -0500
Subject: [PATCH] Add assert.throws
Closes #57.
---
test/harness/assert.js | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/test/harness/assert.js b/test/harness/assert.js
index 1d9d4a48f2..2c1c884a38 100644
--- a/test/harness/assert.js
+++ b/test/harness/assert.js
@@ -40,3 +40,25 @@ assert.notSameValue = function (actual, unexpected, message) {
}
$ERROR(message);
};
+
+assert.throws = function (expectedErrorConstructor, func) {
+ if (func === undefined) {
+ $ERROR('assert.throws requires two arguments: the error constructor and a function to run');
+ return;
+ }
+
+ try {
+ func();
+ } catch (thrown) {
+ if (typeof thrown !== 'object' || thrown === null) {
+ $ERROR('Thrown value was not an object!');
+ return;
+ }
+ if (thrown.constructor !== expectedErrorConstructor) {
+ $ERROR('Expected a ' + expectedErrorConstructor.name + ' but got a ' + thrown.constructor.name);
+ }
+ return;
+ }
+
+ $ERROR('Expected a ' + expectedErrorConstructor.name + ' to be thrown but no exception was thrown at all');
+};
--
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