public void TestChangeMultiplePhoneMustReturnNumberOfChangedPhones()
        {
            var test = new PhonebookRepository();
            test.AddPhone("Pesho", new[] { "08895624", "08895625", "08895626" });
            test.AddPhone("Gosho", new[] { "08895624", "08895625", "08895626" });

            int changedPhones = test.ChangePhone("08895624", "08895628");

            Assert.AreEqual(2, changedPhones);
        }
        public void TestMethodWithValidStartPositionAndCount()
        {
            var test = new PhonebookRepository();
            test.AddPhone("Pesho", new[] { "08895624", "08895625", "08895626" });
            test.AddPhone("Gosho", new[] { "08895624", "08895625", "08895626" });
            test.AddPhone("Mara", new[] { "08895624", "08895625", "08895626" });

            var result = test.ListEntries(0, 3);
            int returnedEntriesCount = result.Length;

            Assert.AreEqual(3, returnedEntriesCount);
        }
        public void TestAddDuplicatePhonebookEntryWithSameNumberMustChangeNothing()
        {
            var test = new PhonebookRepository();

            test.AddPhone("Pesho", new[] { "08895624" });
            test.AddPhone("Pesho", new[] { "08895624" });

            int entriesCount = test.PhoneEntrySortedCount;
            int numbersCount = test.KeyNumberValueEntryCount;

            Assert.AreEqual(1, entriesCount);
            Assert.AreEqual(1, numbersCount);
        }
        public void TestAddDuplicatePhonebookEntryWithDiferentNumberMustMergeNumbers()
        {
            var test = new PhonebookRepository();

            test.AddPhone("Pesho", new[] { "08895624" });
            bool isNewNumber = test.AddPhone("Pesho", new[] { "08895625" });

            int entriesCount = test.PhoneEntrySortedCount;
            int numbersCount = test.KeyNumberValueEntryCount;

            Assert.AreEqual(false, isNewNumber);
            Assert.AreEqual(1, entriesCount);
            Assert.AreEqual(2, numbersCount);
        }
        public void TestAddUniquePhonebookEntryWithMultipleNumbers()
        {
            var test = new PhonebookRepository();

            test.AddPhone("Pesho", new[] { "08895624", "08895625", "08895626" });
            int numbersCount = test.KeyNumberValueEntryCount;

            Assert.AreEqual(3, numbersCount);
        }
        public void TestMethodWithInvalidStartPositionShouldReturnNull()
        {
            var test = new PhonebookRepository();
            test.AddPhone("Pesho", new[] { "08895624", "08895625", "08895626" });

            var result=test.ListEntries(2, 1);

            Assert.AreEqual(null, result);
        }
        public void TestAddUniquePhonebookEntryWithSingleNumber()
        {
            var test = new PhonebookRepository();

               bool isNewNumber = test.AddPhone("Pesho", new[] { "08895624" });
            int entriesCount = test.PhoneEntrySortedCount;
            int numbersCount = test.KeyNumberValueEntryCount;

            Assert.AreEqual(true, isNewNumber);
            Assert.AreEqual(1, entriesCount);
        }
        public void TestChangeSinglePhoneMustReturnNumberOfChangedPhones()
        {
            var test = new PhonebookRepository();
            test.AddPhone("Pesho", new[] { "08895624", "08895625", "08895626" });

            int changedPhones = test.ChangePhone("08895624", "08895628");

            Assert.AreEqual(1, changedPhones);

            // Number of phones should stay unchanged
            Assert.AreEqual(3, test.KeyNumberValueEntryCount);
        }