1 files changed, 25 insertions, 0 deletions
diff --git a/chromium/gin/v8_platform_unittest.cc b/chromium/gin/v8_platform_unittest.cc
index 5409e89f642..d2ea2b7768c 100644
--- a/chromium/gin/v8_platform_unittest.cc
+++ b/chromium/gin/v8_platform_unittest.cc
@@ -4,6 +4,9 @@
 
 #include "gin/public/v8_platform.h"
 
+#include <atomic>
+
+#include "base/test/task_environment.h"
 #include "base/trace_event/trace_event.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -62,4 +65,26 @@ TEST(V8PlatformTest, TraceStateObserverFired) {
   ASSERT_EQ(0, test_observer.Disabled());
 }
 
+// Tests that PostJob runs a task and is done after Join.
+TEST(V8PlatformTest, PostJobSimple) {
+  base::test::TaskEnvironment task_environment;
+  std::atomic_size_t num_tasks_to_run(4);
+  class Task : public v8::JobTask {
+   public:
+    explicit Task(std::atomic_size_t* num_tasks_to_run)
+        : num_tasks_to_run(num_tasks_to_run) {}
+    void Run(v8::JobDelegate* delegate) override { --(*num_tasks_to_run); }
+    size_t GetMaxConcurrency() const override { return *num_tasks_to_run; }
+
+    std::atomic_size_t* num_tasks_to_run;
+  };
+  auto handle =
+      V8Platform::Get()->PostJob(v8::TaskPriority::kUserVisible,
+                                 std::make_unique<Task>(&num_tasks_to_run));
+  EXPECT_TRUE(handle->IsRunning());
+  handle->Join();
+  EXPECT_FALSE(handle->IsRunning());
+  DCHECK_EQ(num_tasks_to_run, 0U);
+}
+
 }  // namespace gin