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// Copyright (c) 2011 The Chromium 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 "base/win/enum_variant.h"
#include "base/win/scoped_com_initializer.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace win {
TEST(EnumVariantTest, EmptyEnumVariant) {
ScopedCOMInitializer com_initializer;
EnumVariant* ev = new EnumVariant(0);
ev->AddRef();
IUnknown* iunknown;
EXPECT_TRUE(SUCCEEDED(
ev->QueryInterface(IID_IUnknown, reinterpret_cast<void**>(&iunknown))));
iunknown->Release();
IEnumVARIANT* ienumvariant;
EXPECT_TRUE(SUCCEEDED(
ev->QueryInterface(IID_IEnumVARIANT,
reinterpret_cast<void**>(&ienumvariant))));
EXPECT_EQ(ev, ienumvariant);
ienumvariant->Release();
VARIANT out_element;
ULONG out_received = 0;
EXPECT_EQ(S_FALSE, ev->Next(1, &out_element, &out_received));
EXPECT_EQ(0u, out_received);
EXPECT_EQ(S_FALSE, ev->Skip(1));
EXPECT_EQ(S_OK, ev->Reset());
IEnumVARIANT* ev2 = NULL;
EXPECT_EQ(S_OK, ev->Clone(&ev2));
EXPECT_NE(static_cast<IEnumVARIANT*>(NULL), ev2);
EXPECT_NE(ev, ev2);
EXPECT_EQ(S_FALSE, ev2->Skip(1));
EXPECT_EQ(S_OK, ev2->Reset());
ULONG ev2_finalrefcount = ev2->Release();
EXPECT_EQ(0u, ev2_finalrefcount);
ULONG ev_finalrefcount = ev->Release();
EXPECT_EQ(0u, ev_finalrefcount);
}
TEST(EnumVariantTest, SimpleEnumVariant) {
ScopedCOMInitializer com_initializer;
EnumVariant* ev = new EnumVariant(3);
ev->AddRef();
ev->ItemAt(0)->vt = VT_I4;
ev->ItemAt(0)->lVal = 10;
ev->ItemAt(1)->vt = VT_I4;
ev->ItemAt(1)->lVal = 20;
ev->ItemAt(2)->vt = VT_I4;
ev->ItemAt(2)->lVal = 30;
// Get elements one at a time.
VARIANT out_element;
ULONG out_received = 0;
EXPECT_EQ(S_OK, ev->Next(1, &out_element, &out_received));
EXPECT_EQ(1u, out_received);
EXPECT_EQ(VT_I4, out_element.vt);
EXPECT_EQ(10, out_element.lVal);
EXPECT_EQ(S_OK, ev->Skip(1));
EXPECT_EQ(S_OK, ev->Next(1, &out_element, &out_received));
EXPECT_EQ(1u, out_received);
EXPECT_EQ(VT_I4, out_element.vt);
EXPECT_EQ(30, out_element.lVal);
EXPECT_EQ(S_FALSE, ev->Next(1, &out_element, &out_received));
// Reset and get all elements at once.
VARIANT out_elements[3];
EXPECT_EQ(S_OK, ev->Reset());
EXPECT_EQ(S_OK, ev->Next(3, out_elements, &out_received));
EXPECT_EQ(3u, out_received);
EXPECT_EQ(VT_I4, out_elements[0].vt);
EXPECT_EQ(10, out_elements[0].lVal);
EXPECT_EQ(VT_I4, out_elements[1].vt);
EXPECT_EQ(20, out_elements[1].lVal);
EXPECT_EQ(VT_I4, out_elements[2].vt);
EXPECT_EQ(30, out_elements[2].lVal);
EXPECT_EQ(S_FALSE, ev->Next(1, &out_element, &out_received));
// Clone it.
IEnumVARIANT* ev2 = NULL;
EXPECT_EQ(S_OK, ev->Clone(&ev2));
EXPECT_TRUE(ev2 != NULL);
EXPECT_EQ(S_FALSE, ev->Next(1, &out_element, &out_received));
EXPECT_EQ(S_OK, ev2->Reset());
EXPECT_EQ(S_OK, ev2->Next(3, out_elements, &out_received));
EXPECT_EQ(3u, out_received);
EXPECT_EQ(VT_I4, out_elements[0].vt);
EXPECT_EQ(10, out_elements[0].lVal);
EXPECT_EQ(VT_I4, out_elements[1].vt);
EXPECT_EQ(20, out_elements[1].lVal);
EXPECT_EQ(VT_I4, out_elements[2].vt);
EXPECT_EQ(30, out_elements[2].lVal);
EXPECT_EQ(S_FALSE, ev2->Next(1, &out_element, &out_received));
ULONG ev2_finalrefcount = ev2->Release();
EXPECT_EQ(0u, ev2_finalrefcount);
ULONG ev_finalrefcount = ev->Release();
EXPECT_EQ(0u, ev_finalrefcount);
}
} // namespace win
} // namespace base
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