public void GetNamespaceFromFQN_Valid_ReturnsNamespace()
        {
            // Arrange
            var fqn = "Abc.Xyz";

            // Act
            var namespaceName = AddUsingsCodeActionProviderFactory.GetNamespaceFromFQN(fqn);

            // Assert
            Assert.Equal("Abc", namespaceName);
        }
        public void GetNamespaceFromFQN_Invalid_ReturnsEmpty()
        {
            // Arrange
            var fqn = "Abc";

            // Act
            var namespaceName = AddUsingsCodeActionProviderFactory.GetNamespaceFromFQN(fqn);

            // Assert
            Assert.Empty(namespaceName);
        }