Áp dụng Tests với iOS

Áp dụng Tests với iOS

By Đào FnB

The test pyramid

Some text here about the topic of discussion

"A measure to check if the code meets the defined specifications." 

​Test

Multiple Choice

What is a test?

• A measure to increase code coverage

• A measure to check if the code meets the defined specifications

• A measure to check if the code is visually beautiful

• A measure to check if the code contains security vulnerabilities?

Multiple Choice

What is the most basic type of developer level test?

• Integration Test

• Basic Test

• Unit Test

• UI Test

The Art of Unit Testing

" A unit test is a piece of code that invokes a unit of work and checks one specific end result of that unit of work.”

​Unit Test Structure

func testArraySorting() {

​

​ let input = [1, 7, 6, 3, 10]

​

​ let output = input.sorted()

​

XCTAssertEqual(output, [1, 3, 6, 7, 10])

}

Run the code

​Prepare Input

Output

Testable code

​Characteristic of Testable code

Control over inputs

​

Visibility into outputs

​

No hidden state

Multiple Choice

Testable code?

• YES

• NO

​Testability Techniques

​Protocols and parameterization

​

Separating logic and effects

• Reduce references to shared instances

• Accept parameterized input

• Introduce a protocol Create a testing implementation

​​Protocols and Parameterization

​Separating Logic and Effects

​

• Extract algorithms

• Functional style with value types

• Thin layer on top to execute effects

​Separating Logic and Effects

​Testability Techniques

​Protocols and parameterization

​

Separating logic and effects

​Test driven development

​Red: Writing a failing test.

Green: Writing just enough code to make the test pass.

Refactor: Cleaning up and optimizing your code.

​

Multiple Choice

____: Writing just enough code to make the test pass

• Refactor

• GREEN

• RED

Demo

5:00 a.m.--11:59 a.m.

Good morning.

​

12:00 p.m.--4:59 p.m.

Good afternoon.

​

5:00 p.m.--4:59 a.m.

Good evening.

Time-of-Day Greeter

Multiple Choice

Which of the following is not a stage in TDD?

• RED

• GREEN

• COMMIT

• REFACTOR