Learn C++ Online

This lesson contains approximately 40 minutes of video content.

Testing vs. debugging

What to do and not to do

Careful considerations

Informal testing and debugging

Assert

Formal tests

Questions

QT&D Q1

This question is ungraded.

Which of the following makes your code MORE difficult to read?

Commenting non-intuitive code.

Keeping all of the code in one giant, 1000+ line function.

Meaningful variable names.

Using library implementations of data structures and other facilities.

Practice question: try as many times as you like

QT&D Q2

This question is ungraded.

Which of the following are examples of informal testing and debugging?

Running through the program by hand with pen and paper

Writing cout statements in your code to check values of variables.

Stepping through code with a command-line debugger such as GDB or LLDB.

All of the above.

Practice question: try as many times as you like

QT&D Q3

This question is ungraded.

True or false: Informal testing is a perfect substitute for formal testing.

False.

True

Practice question: try as many times as you like

QT&D Q4

This question is ungraded.

What happens when an assertion’s expression evaluates to false? (assume that the assertion is not bypassed by any compilation flags)

Nothing happens.

The program continues to run, but it prints an error message to standard output.

The program halts until the user hits ‘Enter’ to acknowledge the error message printed to standard output, and then it continues to run.

The program immediately terminates and prints an error message to standard output.

Practice question: try as many times as you like

QT&D Q5

This question is ungraded.

Which type of formal testing verifies the behavior of low-level code in isolation from the rest of the system?

Component tests.

Integration tests.

System tests.

Unit tests.

Practice question: try as many times as you like

Testing and debugging

Testing vs. debugging

What to do and not to do

Careful considerations

Informal testing and debugging

Assert

Formal tests

Questions

Q1

QT&D Q1

Q2

QT&D Q2

Q3

QT&D Q3

Q4

QT&D Q4

Q5

QT&D Q5