Unit Testing Basics

Introduction to Unit Testing in Rust

Section Overview: In this section, the speaker introduces the basics of unit testing in Rust. They explain what a unit test is, how to create and run them, and why they are important.

Creating a Project

  • The speaker creates a new library called “midpoint” whose job is to find the midpoint of two integers.
  • Rust provides demonstration code with tests that can be run using cargo test.

Defining Midpoint Function

  • The speaker defines the mid function which returns the midpoint of two integers.
  • Tests are added for different input values.
  • Running tests results in failures due to undefined functions.

Fixing Midpoint Function

  • The speaker fixes the mid function by defining it for different cases.
  • More tests are added for different input values.
  • Overflow error occurs when using larger integer values.

Understanding Unit Tests

  • A failing test is one that panics.
  • A unit test is any function annotated with “test” that does not panic when executed.

Overall, this video provides an introduction to unit testing in Rust. It covers creating a project, defining and fixing functions, and understanding what a unit test is.

⭐️Assert Equals Macro: assert_eq!

Section Overview: In this section, the speaker explains what the assert equals macro does and how it works. They also discuss how unit tests are defined in their own module.

Assert Equals Macro

  • The assert equals macro is used to panic if two values are not equal.
  • Unit tests are often defined in their own module.
  • Modules can be annotated with the config test annotation to only compile when running a test.

⭐️Assert Macro

Section Overview: In this section, the speaker explains what the assert macro does and how it works.

Assert Macro

  • The assert macro takes an expression and evaluates it.
  • It must return true and can be more sophisticated as long as it has a Boolean result.
  • Multiple tests can be added using expressions such as greater than or less than.

Pretty Assertion Thing

Section Overview: In this section, the speaker discusses pretty assertion thing and demonstrates its use.

⭐⭐⭐️️️Pretty Assertion Thing

  • Pretty assertion thing is used to get a better understanding of why a test failed.
  • It provides more information about where the difference between expected and actual values occurred.

Conclusion

Section Overview: In this section, the speaker concludes by expressing curiosity about whether anyone can figure out how to define midpoint on size values without hitting that underflow bug.

Conclusion

  • The speaker expresses curiosity about defining midpoint on size values without hitting an underflow bug.

Generated by Video Highlight

https://videohighlight.com/video/summary/kQQXx1oqASM