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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 <wrl/client.h>
#include <wrl/implements.h>
#include "base/win/scoped_com_initializer.h"
#include "base/win/scoped_variant.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace win {
TEST(EnumVariantTest, EmptyEnumVariant) {
ScopedCOMInitializer com_initializer;
Microsoft::WRL::ComPtr<EnumVariant> ev = Microsoft::WRL::Make<EnumVariant>(0);
Microsoft::WRL::ComPtr<IEnumVARIANT> ienumvariant;
ASSERT_TRUE(SUCCEEDED(ev->QueryInterface(IID_PPV_ARGS(&ienumvariant))));
{
base::win::ScopedVariant out_element;
ULONG out_received = 0;
EXPECT_EQ(S_FALSE, ev->Next(1, out_element.Receive(), &out_received));
EXPECT_EQ(0u, out_received);
}
EXPECT_EQ(S_FALSE, ev->Skip(1));
EXPECT_EQ(S_OK, ev->Reset());
Microsoft::WRL::ComPtr<IEnumVARIANT> ev2;
EXPECT_EQ(S_OK, ev->Clone(&ev2));
EXPECT_NE(nullptr, ev2);
EXPECT_NE(ev, ev2);
EXPECT_EQ(S_FALSE, ev2->Skip(1));
EXPECT_EQ(S_OK, ev2->Reset());
}
TEST(EnumVariantTest, SimpleEnumVariant) {
ScopedCOMInitializer com_initializer;
Microsoft::WRL::ComPtr<EnumVariant> ev = Microsoft::WRL::Make<EnumVariant>(3);
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 from index 0 and 2.
base::win::ScopedVariant out_element_0;
ULONG out_received_0 = 0;
EXPECT_EQ(S_OK, ev->Next(1, out_element_0.Receive(), &out_received_0));
EXPECT_EQ(1u, out_received_0);
EXPECT_EQ(VT_I4, out_element_0.ptr()->vt);
EXPECT_EQ(10, out_element_0.ptr()->lVal);
EXPECT_EQ(S_OK, ev->Skip(1));
base::win::ScopedVariant out_element_2;
ULONG out_received_2 = 0;
EXPECT_EQ(S_OK, ev->Next(1, out_element_2.Receive(), &out_received_2));
EXPECT_EQ(1u, out_received_2);
EXPECT_EQ(VT_I4, out_element_2.ptr()->vt);
EXPECT_EQ(30, out_element_2.ptr()->lVal);
base::win::ScopedVariant placeholder_variant;
EXPECT_EQ(S_FALSE, ev->Next(1, placeholder_variant.Receive(), nullptr));
// Verify the reset works for the next step.
ASSERT_EQ(S_OK, ev->Reset());
// Get all elements at once.
VARIANT out_elements[3];
ULONG out_received_multiple;
for (int i = 0; i < 3; ++i)
::VariantInit(&out_elements[i]);
EXPECT_EQ(S_OK, ev->Next(3, out_elements, &out_received_multiple));
EXPECT_EQ(3u, out_received_multiple);
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);
for (int i = 0; i < 3; ++i)
::VariantClear(&out_elements[i]);
base::win::ScopedVariant placeholder_variant_multiple;
EXPECT_EQ(S_FALSE,
ev->Next(1, placeholder_variant_multiple.Receive(), nullptr));
}
TEST(EnumVariantTest, Clone) {
ScopedCOMInitializer com_initializer;
Microsoft::WRL::ComPtr<EnumVariant> ev = Microsoft::WRL::Make<EnumVariant>(3);
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;
// Clone it.
Microsoft::WRL::ComPtr<IEnumVARIANT> ev2;
EXPECT_EQ(S_OK, ev->Clone(&ev2));
EXPECT_TRUE(ev2 != nullptr);
VARIANT out_elements[3];
for (int i = 0; i < 3; ++i)
::VariantInit(&out_elements[i]);
EXPECT_EQ(S_OK, ev2->Next(3, out_elements, nullptr));
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);
for (int i = 0; i < 3; ++i)
::VariantClear(&out_elements[i]);
}
} // namespace win
} // namespace base
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