src/v8/test/cctest/test-microtask-delivery.cc

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  27
  28 #include "v8.h"
  29
  30 #include "cctest.h"
  31
  32 using namespace v8;
  33 namespace i = v8::internal;
  34
  35 namespace {
  36 class HarmonyIsolate {
  37  public:
  38   HarmonyIsolate() {
  39     i::FLAG_harmony_promises = true;
  40     isolate_ = Isolate::New();
  41     isolate_->Enter();
  42   }
  43
  44   ~HarmonyIsolate() {
  45     isolate_->Exit();
  46     isolate_->Dispose();
  47   }
  48
  49   Isolate* GetIsolate() const { return isolate_; }
  50
  51  private:
  52   Isolate* isolate_;
  53 };
  54 }
  55
  56
  57 TEST(MicrotaskDeliverySimple) {
  58   HarmonyIsolate isolate;
  59   HandleScope scope(isolate.GetIsolate());
  60   LocalContext context(isolate.GetIsolate());
  61   CompileRun(
  62       "var ordering = [];"
  63       "var resolver = {};"
  64       "function handler(resolve) { resolver.resolve = resolve; }"
  65       "var obj = {};"
  66       "var observeOrders = [1, 4];"
  67       "function observer() {"
  68         "ordering.push(observeOrders.shift());"
  69         "resolver.resolve();"
  70       "}"
  71       "var p = new Promise(handler);"
  72       "p.then(function() {"
  73         "ordering.push(2);"
  74       "}).then(function() {"
  75         "ordering.push(3);"
  76         "obj.id++;"
  77         "return new Promise(handler);"
  78       "}).then(function() {"
  79         "ordering.push(5);"
  80       "}).then(function() {"
  81         "ordering.push(6);"
  82       "});"
  83       "Object.observe(obj, observer);"
  84       "obj.id = 1;");
  85   CHECK_EQ(6, CompileRun("ordering.length")->Int32Value());
  86   CHECK_EQ(1, CompileRun("ordering[0]")->Int32Value());
  87   CHECK_EQ(2, CompileRun("ordering[1]")->Int32Value());
  88   CHECK_EQ(3, CompileRun("ordering[2]")->Int32Value());
  89   CHECK_EQ(4, CompileRun("ordering[3]")->Int32Value());
  90   CHECK_EQ(5, CompileRun("ordering[4]")->Int32Value());
  91   CHECK_EQ(6, CompileRun("ordering[5]")->Int32Value());
  92 }
  93
  94
  95 TEST(MicrotaskPerIsolateState) {
  96   HarmonyIsolate isolate;
  97   HandleScope scope(isolate.GetIsolate());
  98   LocalContext context1(isolate.GetIsolate());
  99   isolate.GetIsolate()->SetAutorunMicrotasks(false);
 100   CompileRun(
 101       "var obj = { calls: 0 };");
 102   Handle<Value> obj = CompileRun("obj");
 103   {
 104     LocalContext context2(isolate.GetIsolate());
 105     context2->Global()->Set(String::NewFromUtf8(isolate.GetIsolate(), "obj"),
 106                             obj);
 107     CompileRun(
 108         "var resolver = {};"
 109         "new Promise(function(resolve) {"
 110           "resolver.resolve = resolve;"
 111         "}).then(function() {"
 112           "obj.calls++;"
 113         "});"
 114         "(function() {"
 115           "resolver.resolve();"
 116         "})();");
 117   }
 118   {
 119     LocalContext context3(isolate.GetIsolate());
 120     context3->Global()->Set(String::NewFromUtf8(isolate.GetIsolate(), "obj"),
 121                             obj);
 122     CompileRun(
 123         "var foo = { id: 1 };"
 124         "Object.observe(foo, function() {"
 125           "obj.calls++;"
 126         "});"
 127         "foo.id++;");
 128   }
 129   {
 130     LocalContext context4(isolate.GetIsolate());
 131     context4->Global()->Set(String::NewFromUtf8(isolate.GetIsolate(), "obj"),
 132                             obj);
 133     isolate.GetIsolate()->RunMicrotasks();
 134     CHECK_EQ(2, CompileRun("obj.calls")->Int32Value());
 135   }
 136 }