Add arrayWithExactContents asymmetric matcher

- Fixes #817

src/core/asymmetric_equality/ArrayWithExactContents.js

@@ -0,0 +1,31 @@
+getJasmineRequireObj().ArrayWithExactContents = function(j$) {
+
+  function ArrayWithExactContents(sample) {
+    this.sample = sample;
+  }
+
+  ArrayWithExactContents.prototype.asymmetricMatch = function(other, customTesters) {
+    if (!j$.isArray_(this.sample)) {
+      throw new Error('You must provide an array to arrayWithExactContents, not ' + j$.pp(this.sample) + '.');
+    }
+
+    if (this.sample.length !== other.length) {
+      return false;
+    }
+
+    for (var i = 0; i < this.sample.length; i++) {
+      var item = this.sample[i];
+      if (!j$.matchersUtil.contains(other, item, customTesters)) {
+        return false;
+      }
+    }
+
+    return true;
+  };
+
+  ArrayWithExactContents.prototype.jasmineToString = function() {
+    return '<jasmine.arrayWithExactContents ' + j$.pp(this.sample) + '>';
+  };
+
+  return ArrayWithExactContents;
+};