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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/assistant/model/assistant_query_history.h"
#include "base/strings/string_number_conversions.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace ash {
// Assert that iterator Prev() or Next() does not crash on an empty history.
TEST(AssistantQueryHistory, Empty) {
AssistantQueryHistory history(10);
auto it = history.GetIterator();
EXPECT_EQ(std::nullopt, it->Next());
EXPECT_EQ(std::nullopt, it->Prev());
EXPECT_EQ(std::nullopt, it->Next());
EXPECT_EQ(std::nullopt, it->Next());
EXPECT_EQ(std::nullopt, it->Next());
EXPECT_EQ(std::nullopt, it->Prev());
}
TEST(AssistantQueryHistory, Full) {
int size = 3;
AssistantQueryHistory history(size);
// Make more queries than history limit.
for (int i = 0; i <= size; i++)
history.Add(base::NumberToString(i));
auto it = history.GetIterator();
// Assert history only contains last 3 queries.
for (int i = size; i > 0; i--)
EXPECT_EQ(base::NumberToString(i), it->Prev().value());
EXPECT_EQ(base::NumberToString(1), it->Prev().value());
// Assert that iterate does not pass first query.
EXPECT_EQ(base::NumberToString(1), it->Prev().value());
// Make more queries than history limit again.
for (int i = 0; i <= size; i++)
history.Add(base::NumberToString(i + 4));
it->ResetToLast();
// Assert that history only contains last 3 queries.
for (int i = size; i > 0; i--)
EXPECT_EQ(base::NumberToString(i + 4), it->Prev());
EXPECT_EQ(base::NumberToString(5), it->Prev().value());
// Assert that iterate does not pass first query.
EXPECT_EQ(base::NumberToString(5), it->Prev().value());
}
TEST(AssistantQueryHistory, Add) {
AssistantQueryHistory history(10);
auto it = history.GetIterator();
EXPECT_EQ(std::nullopt, it->Next());
EXPECT_EQ(std::nullopt, it->Next());
EXPECT_EQ(std::nullopt, it->Next());
EXPECT_EQ(std::nullopt, it->Next());
history.Add("Query01");
history.Add("Query02");
it = history.GetIterator();
EXPECT_EQ(std::nullopt, it->Next());
EXPECT_EQ("Query02", it->Prev().value());
EXPECT_EQ("Query01", it->Prev().value());
EXPECT_EQ("Query01", it->Prev().value());
EXPECT_EQ("Query02", it->Next().value());
EXPECT_EQ(std::nullopt, it->Next());
EXPECT_EQ(std::nullopt, it->Next());
}
} // namespace ash
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