public void IsTest_ShouldReturnTrue_IfKeyAndValueAreEquivalent()
        {
            // Arrange
            var entry1 = new KeyValuePair<string, int>("aiueo", 10);
            var entry2 = new KeyValuePair<string, int>("aiueo", 10);

            // Act
            var result = entry1.Is(entry2);

            // Assert
            Assert.IsTrue(result);
        }
        public void IsTest_ShouldReturnFalse_IfKeyOrValueIsDifferent02()
        {
            // Arrange
            var entry1 = new KeyValuePair<string, int>("kakikukeko", 10);
            var entry2 = new KeyValuePair<string, int>("aiueo", 10);

            // Act
            var result = entry1.Is(entry2);

            // Assert
            Assert.IsFalse(result);
        }