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5 Easy Steps to Learn Espresso
Step1. Pre RequisitesforSetup
1. AndroidStudioshouldbe installed
2. Create a EmulatorinAndroidStudioorConnectreal device toruna TestScript.
3. Sample Appshouldbe importedorcode writtenfora DemoProject& can run app successfully.
(If youare not goodat androidbasicsin developmentthenrecommended touse demoprojectapp
of AndroidStudio)
4. Turn of DeveloperSettings ->Turn Off all animations indevice.
Step2: Crate Test Package under targetedProject Directory/App
Go to navigate optioninAndroidStudioandClickonTestoptiontocreate a TestClass.
(UnderApp -> Java -> AndroidTestPackage)
Step3: Sample TestCase Program
OpenyourTestCaseTest.javafileandwrite code asbelow:
//RequiredPackagesforEspresso
importstaticandroid.support.test.espresso.Espresso.onView;
importstaticandroid.support.test.espresso.matcher.ViewMatchers.withText;
importstaticandroid.support.test.espresso.matcher.RootMatchers.withDecorView;
importstaticandroid.support.test.espresso.assertion.ViewAssertions.matches;
@RunWith(AndroidJUnit4.class)
publicclassDemoClassTest{
@Rule
ActivityTestRule<AppActivityClassName>ref var=
new ActivityTestRule<>(AppActivityClass.class);
/**
Ref Code onlyandwrite as per yourapp UI attribute
**/
@Test
publicvoidtestcase1(){
ViewInteractionref =onView(withID(R.id.refID1));
ref.perform(click());
onView(withId(R.id.resultText))
.check(matches(withText(("AsserstionTesttoMatch fromUI"))));
//OR

onView(withID(R.id.refID1)).perform(Click());
onView(withID(R.id.refID3)).perform(typeText("InputText"));
onView(withID(R.id.refID4)).perform(typeText("Input Text2"),closeSoftKeyboard());
onView(withId(R.id.resultText))
.check(matches(withText(("AsserstionTesttoMatch fromUI"))));
}
}
Step4:
Right clickonTest methodandClickon "Run<testMethod>"inEmulatoror Real Device.
Step5: [Optional] Creationof TestSuite formultiple classes
To Create TestSuite formultiple Testclasses(xxTest.java) filesunderandroidTestpackage
Create a class undersame androidTestpackage withclassname as"UnitTestSuite".
importcom.example.android.testing.mysample.DemoClassTest;
importcom.example.android.testing.mysample.DemoClassTest;
importorg.junit.runner.RunWith;
importorg.junit.runners.Suite;
// Runsall unittests.
@RunWith(Suite.class)
@Suite.SuiteClasses({DemoClassTest.class,
CalculatorAddParameterizedTest.class})
publicclassUnitTestSuite {}
AndRun yourTest Suite fromthisclass.Welcome toEspresso!!
Ref Note:
Gradle Info:
applyplugin:'com.android.application'
android{
compileSdkVersion25
buildToolsVersion"25.0.2"
defaultConfig{
applicationId"com.example.ui.espresso"
minSdkVersion15
targetSdkVersion25
versionCode 1

versionName "1.0"
//Addedinstrumentationrunnerforconfiguration-----------------------------------
testInstrumentationRunner"android.support.test.runner.AndroidJUnitRunner"
}
buildTypes{
release {
minifyEnabledfalse
proguardFilesgetDefaultProguardFile('proguard-android.txt'),'proguard-rules.pro'
}
}
}
dependencies{
compile fileTree(dir:'libs',include:['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2',{
exclude group:'com.android.support',module:'support-annotations'
})
// Espressodependencies----------------------------
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2'){
}
androidTestCompile('com.android.support.test:runner:0.5'){
}
compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'com.android.support:design:25.3.1'
testCompile'junit:junit:4.12'
}
Ref URL:
https://developer.android.com/training/testing/unit-testing/instrumented-unit-tests.html#run
You can alsouser EspressoRecorderinAndroidStudiotowrite the testcases.
----- CommentsandSuggestionsare welcome.Love totake yourquestions!Thanks ----

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5 Easy Steps to Learn Espresso

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5 Easy Steps to Learn Espresso