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#include "testutils/QueueMapTest.h"
#include <boost/optional/optional_io.hpp>
class QueueMapPeekTest: public QueueMapTest {};
TEST_F(QueueMapPeekTest, PoppingFromEmpty) {
EXPECT_EQ(boost::none, peek());
}
TEST_F(QueueMapPeekTest, PushingOne) {
push(3, 2);
EXPECT_EQ(2, peek().value());
}
TEST_F(QueueMapPeekTest, PushingTwo) {
push(2, 3);
push(3, 4);
EXPECT_EQ(3, peek().value());
EXPECT_EQ(3, peek().value());
EXPECT_EQ(3, pop().value());
EXPECT_EQ(4, peek().value());
EXPECT_EQ(4, peek().value());
EXPECT_EQ(4, pop().value());
EXPECT_EQ(boost::none, peek());
EXPECT_EQ(boost::none, pop());
}
TEST_F(QueueMapPeekTest, AfterPushingTwoAndPoppingFirst) {
push(2, 3);
push(3, 4);
pop(2);
EXPECT_EQ(boost::none, pop(2));
EXPECT_EQ(4, peek().value());
}
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