Shuffle assertions

src/ol/asserts.js

@@ -0,0 +1,15 @@
+goog.provide('ol.asserts');
+
+goog.require('ol');
+goog.require('ol.AssertionError');
+
+
+/**
+ * @param {*} assertion Assertion we expected to be truthy.
+ * @param {number} errorCode Error code.
+ */
+ol.asserts.assert = function(assertion, errorCode) {
+  if (!assertion) {
+    throw new ol.AssertionError(errorCode);
+  }
+};