public void Part1_Input_123789_ShouldNotBeValid()
{
// Arrange
var subject = new SecureContainer();
// Act
var result = subject.IsValidPart1("123789");
// Assert
Assert.False(result);
}
public void Part1_Input_111111_ShouldBeValid()
{
// Arrange
var subject = new SecureContainer();
// Act
var result = subject.IsValidPart1("111111");
// Assert
Assert.True(result);
}