1 files changed, 177 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/TestAtoms.cpp b/xpcom/tests/gtest/TestAtoms.cpp
new file mode 100644
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+++ b/xpcom/tests/gtest/TestAtoms.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/ArrayUtils.h"
+
+#include "nsAtom.h"
+#include "nsString.h"
+#include "UTFStrings.h"
+#include "nsIThread.h"
+#include "nsThreadUtils.h"
+
+#include "gtest/gtest.h"
+#include "mozilla/gtest/MozAssertions.h"
+
+using namespace mozilla;
+
+int32_t NS_GetUnusedAtomCount(void);
+
+namespace TestAtoms {
+
+TEST(Atoms, Basic)
+{
+  for (unsigned int i = 0; i < ArrayLength(ValidStrings); ++i) {
+    nsDependentString str16(ValidStrings[i].m16);
+    nsDependentCString str8(ValidStrings[i].m8);
+
+    RefPtr<nsAtom> atom = NS_Atomize(str16);
+
+    EXPECT_TRUE(atom->Equals(str16));
+
+    nsString tmp16;
+    nsCString tmp8;
+    atom->ToString(tmp16);
+    atom->ToUTF8String(tmp8);
+    EXPECT_TRUE(str16.Equals(tmp16));
+    EXPECT_TRUE(str8.Equals(tmp8));
+
+    EXPECT_TRUE(nsDependentString(atom->GetUTF16String()).Equals(str16));
+
+    EXPECT_TRUE(nsAtomString(atom).Equals(str16));
+    EXPECT_TRUE(nsDependentAtomString(atom).Equals(str16));
+    EXPECT_TRUE(nsAtomCString(atom).Equals(str8));
+  }
+}
+
+TEST(Atoms, 16vs8)
+{
+  for (unsigned int i = 0; i < ArrayLength(ValidStrings); ++i) {
+    RefPtr<nsAtom> atom16 = NS_Atomize(ValidStrings[i].m16);
+    RefPtr<nsAtom> atom8 = NS_Atomize(ValidStrings[i].m8);
+    EXPECT_EQ(atom16, atom8);
+  }
+}
+
+TEST(Atoms, Null)
+{
+  nsAutoString str(u"string with a \0 char"_ns);
+  nsDependentString strCut(str.get());
+
+  EXPECT_FALSE(str.Equals(strCut));
+
+  RefPtr<nsAtom> atomCut = NS_Atomize(strCut);
+  RefPtr<nsAtom> atom = NS_Atomize(str);
+
+  EXPECT_EQ(atom->GetLength(), str.Length());
+  EXPECT_TRUE(atom->Equals(str));
+  EXPECT_NE(atom, atomCut);
+  EXPECT_TRUE(atomCut->Equals(strCut));
+}
+
+TEST(Atoms, Invalid)
+{
+  for (unsigned int i = 0; i < ArrayLength(Invalid16Strings); ++i) {
+    nsrefcnt count = NS_GetNumberOfAtoms();
+
+    {
+      RefPtr<nsAtom> atom16 = NS_Atomize(Invalid16Strings[i].m16);
+      EXPECT_TRUE(atom16->Equals(nsDependentString(Invalid16Strings[i].m16)));
+    }
+
+    EXPECT_EQ(count, NS_GetNumberOfAtoms());
+  }
+#ifndef DEBUG
+  // Don't run this test in debug builds as that intentionally asserts.
+  for (unsigned int i = 0; i < ArrayLength(Invalid8Strings); ++i) {
+    nsrefcnt count = NS_GetNumberOfAtoms();
+
+    {
+      RefPtr<nsAtom> atom8 = NS_Atomize(Invalid8Strings[i].m8);
+      RefPtr<nsAtom> atom16 = NS_Atomize(Invalid8Strings[i].m16);
+      EXPECT_EQ(atom16, atom8);
+      EXPECT_TRUE(atom16->Equals(nsDependentString(Invalid8Strings[i].m16)));
+    }
+
+    EXPECT_EQ(count, NS_GetNumberOfAtoms());
+  }
+
+  for (unsigned int i = 0; i < ArrayLength(Malformed8Strings); ++i) {
+    nsrefcnt count = NS_GetNumberOfAtoms();
+
+    {
+      RefPtr<nsAtom> atom8 = NS_Atomize(Malformed8Strings[i].m8);
+      RefPtr<nsAtom> atom16 = NS_Atomize(Malformed8Strings[i].m16);
+      EXPECT_EQ(atom8, atom16);
+    }
+
+    EXPECT_EQ(count, NS_GetNumberOfAtoms());
+  }
+#endif
+}
+
+#define FIRST_ATOM_STR "first static atom. Hello!"
+#define SECOND_ATOM_STR "second static atom. @World!"
+#define THIRD_ATOM_STR "third static atom?!"
+
+static bool isStaticAtom(nsAtom* atom) {
+  // Don't use logic && in order to ensure that all addrefs/releases are always
+  // run, even if one of the tests fail. This allows us to run this code on a
+  // non-static atom without affecting its refcount.
+  bool rv = (atom->AddRef() == 2);
+  rv &= (atom->AddRef() == 2);
+  rv &= (atom->AddRef() == 2);
+
+  rv &= (atom->Release() == 1);
+  rv &= (atom->Release() == 1);
+  rv &= (atom->Release() == 1);
+  return rv;
+}
+
+TEST(Atoms, Table)
+{
+  nsrefcnt count = NS_GetNumberOfAtoms();
+
+  RefPtr<nsAtom> thirdDynamic = NS_Atomize(THIRD_ATOM_STR);
+
+  EXPECT_FALSE(isStaticAtom(thirdDynamic));
+
+  EXPECT_TRUE(thirdDynamic);
+  EXPECT_EQ(NS_GetNumberOfAtoms(), count + 1);
+}
+
+static void AccessAtoms(void*) {
+  for (int i = 0; i < 10000; i++) {
+    RefPtr<nsAtom> atom = NS_Atomize(u"A Testing Atom");
+  }
+}
+
+TEST(Atoms, ConcurrentAccessing)
+{
+  static const size_t kThreadCount = 4;
+  // Force a GC before so that we don't have any unused atom.
+  NS_GetNumberOfAtoms();
+  EXPECT_EQ(NS_GetUnusedAtomCount(), int32_t(0));
+
+  // Spawn PRThreads to do the concurrent atom access, to make sure we don't
+  // spin the main thread event loop. Spinning the event loop may run a task
+  // that uses an atom, leading to a false positive test failure.
+  PRThread* threads[kThreadCount];
+  for (size_t i = 0; i < kThreadCount; i++) {
+    threads[i] = PR_CreateThread(PR_USER_THREAD, AccessAtoms, nullptr,
+                                 PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD,
+                                 PR_JOINABLE_THREAD, 0);
+    EXPECT_TRUE(threads[i]);
+  }
+
+  for (size_t i = 0; i < kThreadCount; i++) {
+    EXPECT_EQ(PR_SUCCESS, PR_JoinThread(threads[i]));
+  }
+
+  // We should have one unused atom from this test.
+  EXPECT_EQ(NS_GetUnusedAtomCount(), int32_t(1));
+}
+
+}  // namespace TestAtoms