trim succeeding tests

because saucelabs barfs on output > 64k

adapted from
axemclion/grunt-saucelabs#109 (comment)

spec/helpers/load-jsreporter.js

@@ -0,0 +1,37 @@
+// reporter for saucelabs
+jasmine.getEnv().addReporter(new jasmine.JSReporter2());
+
+(function () {
+    var oldJSReport = window.jasmine.getJSReport;
+    window.jasmine.getJSReport = function () {
+        var results = oldJSReport();
+        if (results) {
+            return {
+                durationSec: results.durationSec,
+                suites: removePassingTests(results.suites),
+                passed: results.passed
+            };
+        } else {
+            return null;
+        }
+    };
+
+    function removePassingTests (suites) {
+        return suites.filter(specFailed)
+            .map(mapSuite);
+    }
+
+    function mapSuite (suite) {
+        var result = {};
+        for (var s in suite) {
+            result[s] = suite[s];
+        }
+        result.specs = suite.specs.filter(specFailed);
+        result.suites = removePassingTests(suite.suites);
+        return result;
+    }
+
+    function specFailed (item) {
+        return !item.passed;
+    }
+})();

spec/helpers/spec-helper.js

@@ -1,6 +1,4 @@
 /* global parseTranslate */
-// reporter for saucelabs
-jasmine.getEnv().addReporter(new jasmine.JSReporter2());
 beforeEach(function () {
     d3.select('body').append('div').attr('id', 'test-content');
     jasmine.clock().install();