Reset the env state between parallel batches

src/core/Env.js

@@ -499,6 +499,11 @@ getJasmineRequireObj().Env = function(j$) {
       reportSpecDone
     });
 
+    this.parallelReset = function() {
+      // TODO: ensure that autoCleanClosures was false
+      suiteBuilder.parallelReset();
+    };
+
     /**
      * Executes the specs.
      *

src/core/Runner.js

@@ -2,6 +2,7 @@ getJasmineRequireObj().Runner = function(j$) {
   class Runner {
     constructor(options) {
       this.topSuite_ = options.topSuite;
+      // TODO use names that read like getters
       this.totalSpecsDefined_ = options.totalSpecsDefined;
       this.focusedRunables_ = options.focusedRunables;
       this.runableResources_ = options.runableResources;

src/core/Suite.js

@@ -132,6 +132,10 @@ getJasmineRequireObj().Suite = function(j$) {
     this.reportedDone = false;
   };
 
+  Suite.prototype.removeChildren = function() {
+    this.children = [];
+  };
+
   Suite.prototype.addChild = function(child) {
     this.children.push(child);
   };

src/core/SuiteBuilder.js

@@ -22,6 +22,12 @@ getJasmineRequireObj().SuiteBuilder = function(j$) {
       this.focusedRunables = [];
     }
 
+    parallelReset() {
+      this.topSuite.removeChildren();
+      this.totalSpecsDefined = 0;
+      this.focusedRunables = [];
+    }
+
     describe(description, definitionFn) {
       ensureIsFunction(definitionFn, 'describe');
       const suite = this.suiteFactory_(description);