[Espresso] Espresso를 이용한 UI Test 예제

build.gradle

 

전체 프로젝트 build.gradle이 아닌 module의 build.gradle에 해당 그래들 내용 작성

 

apply plugin: 'com.android.application'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.2"
    defaultConfig {
        applicationId "com.example.myapplication"
        minSdkVersion 29
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'

	// 아래 부분이 Espresso를 위해 필요한 내용들
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
    androidTestImplementation 'com.android.support.test:rules:1.0.2'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
}

 

 

activity_main.xml

 

editText와 textView 그리고 button을 작성

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="match_parent"
    android:layout_width="match_parent">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <EditText
            android:id="@+id/edit_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
        <TextView
            android:id="@+id/text_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello world"/>
        <Button
            android:id="@+id/btn"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
    </LinearLayout>
</LinearLayout>

 

 

MainActivity.java

 

editText에서 변하는 내용을 textView에 set해주고 button을 눌러주면 toast로 textView의 내용을 보여준다.

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private EditText editText;
    private TextView textView;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        editText = findViewById(R.id.edit_text);
        textView = findViewById(R.id.text_view);
        button = findViewById(R.id.btn);

        editText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                textView.setText(s);
            }

            @Override
            public void afterTextChanged(Editable s) {
            }
        });

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(getApplicationContext(), textView.getText(), Toast.LENGTH_SHORT).show();
            }
        });
    }
 }

 

 

EspressoTest.java

 

Espresso를 이용한 테스트 아래 주석을 통해 좀더 자세히 적어두었다.

 

package com.example.myapplication;

import androidx.test.espresso.Espresso;
import androidx.test.espresso.action.ViewActions;
import androidx.test.espresso.assertion.ViewAssertions;
import androidx.test.espresso.matcher.ViewMatchers;
import androidx.test.ext.junit.runners.AndroidJUnit4;
import androidx.test.rule.ActivityTestRule;

import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

@RunWith(AndroidJUnit4.class)
public class EspressoTest {

    // 해당 activity에서 실행하고자 함을 나타낸다.
    @Rule
    public ActivityTestRule mActivityRule = new ActivityTestRule(MainActivity.class);

    @Test
    public void myTest(){

        // edit_text를 찾아서 거기에 crocus라는 내용을 적는다.
        Espresso.onView(ViewMatchers.withId(R.id.edit_text)).perform(ViewActions.typeText("crocus"), ViewActions.closeSoftKeyboard());

        // text_view를 찾아서 현재 textView에 담긴 내용이 crocus인지 확인한다. (assert이용)
        Espresso.onView(ViewMatchers.withId(R.id.text_view)).check(ViewAssertions.matches(ViewMatchers.withText("crocus")));

        // 버튼을 클릭하게 만들어 Toast가 나타나도록한다.(토스트는 앞선 MainActivity에 버튼 행동 정의)
        Espresso.onView(ViewMatchers.withId(R.id.btn)).perform(ViewActions.click());
    }
}

 

 

 

 

 

 

 

 

https://black-jin0427.tistory.com/111