Unit Testing in Android – Step by Step – Software Development Process

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Unit Testing in Android – Step by Step – Software Development Process

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Unit Testing in Android

Step by Step

Created by Wig Cheng (鄭元誠) and Chang Yu-heng (張昱珩)

2014-07-07

Software Development Process

The V-Model

Coding　　Unit Test

=> Test-driven development (TDD)

Unit Testing

An unit can be viewed as the smallest testable part of an application

  • An entire interface or an individual method in object-oriented programming
  • An entire module or an individual function/procedure in procedural programming

Production Code

Test Code

public int sum(int x, int y) {  return x + y;}

public void testSum() {  int i = sum(1, 2);  assertEquals(i, 3);}

Testing Methods

  • White-box testing

The testing code is dedicated for the implementation

Pros:

  • Good coverage and implementation checking

Cons:

  • High cost
Black-box testing

The testing code is dedicated for the interface

Pros:

  • Good for interface checking
Grey-box testing

Basic Code Coverage Criteria

  • Function coverage
  • Statement coverage
  • Branch coverage
  • Condition coverage

Branch Coverage

Production Code

Test Code

public int max(int x, int y) {  if (x > y)    return x;  else    return y;}

public void testMax() {  int i = max(2, 1);  assertEquals(i, 2);  i = max(6, 9);  assertEquals(i, 99);}

Building an Unit Testing Environment

Software Requirement

  • JDK
  • Android SDK
  • Android Studio (IDE)
  • Genymotion (emulator)

Writing Test Cases

Testing Tools

  • Robolectric

Wouldn’t it be nice to run your Android tests directly from inside your IDE?

uiautomator

Automated functional UI test cases

MonkeyTalk

Capture and replay the test cases

CTS

Q & A

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