Create pdfium_unittests binary.

core/src/fxcrt/fx_basic_bstring_unittest.cpp

+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+#include "../../include/fxcrt/fx_basic.h"
+
+TEST(fxcrt, ByteStringCNull) {
+  CFX_ByteStringC null_string;
+  EXPECT_EQ(null_string.GetPtr(), nullptr);
+  EXPECT_EQ(null_string.GetLength(), 0);
+  EXPECT_TRUE(null_string.IsEmpty());
+
+  CFX_ByteStringC another_null_string;
+  EXPECT_TRUE(null_string == another_null_string);
+
+  CFX_ByteString copied_null_string(null_string);
+  EXPECT_EQ(null_string.GetPtr(), nullptr);
+  EXPECT_EQ(null_string.GetLength(), 0);
+  EXPECT_TRUE(null_string.IsEmpty());
+  EXPECT_TRUE(null_string == another_null_string);
+
+  CFX_ByteStringC empty_string("");
+  EXPECT_EQ(null_string.GetPtr(), nullptr);
+  EXPECT_EQ(null_string.GetLength(), 0);
+  EXPECT_TRUE(null_string.IsEmpty());
+  EXPECT_TRUE(null_string == empty_string);
+
+  CFX_ByteStringC non_null_string("a");
+  EXPECT_FALSE(null_string == non_null_string);
+
+  // TODO(tsepez): fix assignment of a null ptr to a CFX_ByteStringC.
+}
+
+TEST(fxcrt, ByteStringCGetID) {
+  CFX_ByteStringC null_string;
+  EXPECT_EQ(null_string.GetID(), 0u);
+
+  CFX_ByteStringC empty_string("");
+  EXPECT_EQ(empty_string.GetID(), 0u);
+}