[英]How to get context in Robolectric Unit test with SQLite in Android
我想在 Android 中使用 Robolelectric 為 SQLiteOpenHelper 做一些單元測試。 但是,我無法創建數據庫,因為我無法獲取上下文。 我嘗試了這里提到的 4 個選項如何在 Robolectric 中訪問應用程序的上下文? 但他們都沒有工作。 在這里,您可以看到測試類的代碼,在“setUp”方法中,您可以看到我嘗試過的不同選項,並在 // 之后顯示了相應的錯誤消息
package com.example.td.barapp;
import android.content.Context;
import android.database.Cursor;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.RuntimeEnvironment;
@RunWith(RobolectricTestRunner.class)
public class DataBaseHelperTest {
private DataBaseHelper helperDB;
@Before
public void setUp() throws Exception {
// Context context = ShadowApplication.getInstance().applicationContext; //Error: Cannot resolve symbol 'applicationContext'
//Context context = Robolectric.application; // Error: Cannot resolve symbol application
//Context context = ApplicationProvider.getApplicationContext(); // Error: Cannot resolve symbol 'ApplicationProvider'
//Context context = RuntimeEnvironment.systemContext; // Error: Cannot resolve symbol 'systemContext'
//Context context = getClass().getClassLoader(); // Error: Required type: Context Provided: ClassLoader
Context context = InstrumentationRegistry.getInstrumentation().getContext(); // Error: Cannot resolve symbol 'InstrumentationRegistry'
helperDB = new DataBaseHelper(context);
}
@After
public void tearDown() {
helperDB.close();
}
@Test
public void insertDataDB_TableRatings() {
boolean insertRating = helperDB.insertDataDB_TableRatings("Orange Juice", "Any", "Any", 1,
0,0,1,0,0 );
Assert.assertTrue(insertRating);
}
@Test
public void getDataDB_TableRating() {
String drinkName = "Orange Juice";
String drinkStrength = "Any";
String drinkSize = "Any";
boolean insertRating = helperDB.insertDataDB_TableRatings(drinkName, drinkStrength, drinkSize, 1,
0,0,1,0,0 );
Cursor res = helperDB.getDataDB_TableRating(drinkName, drinkStrength, drinkSize);
Assert.assertFalse(res.getCount()==0);
res.moveToFirst();
Assert.assertEquals (res.getString(0), drinkName);
Assert.assertEquals (res.getString(6), "1");
drinkSize = "Large";
boolean insertRating2 = helperDB.insertDataDB_TableRatings(drinkName, drinkStrength, drinkSize, 1,
0,0,0,1,0 );
res = helperDB.getDataDB_TableRating(drinkName, drinkStrength, drinkSize);
Assert.assertFalse(res.getCount()==0);
res.moveToFirst();
Assert.assertEquals (res.getString(2), drinkName);
Assert.assertEquals (res.getString(7), "1");
}
@Test
public void updateDataDB_TableRatings() {
String drinkName = "Orange Juice";
String drinkStrength = "Any";
String drinkSize = "Any";
boolean insertRating = helperDB.insertDataDB_TableRatings(drinkName, drinkStrength, drinkSize, 1, 0,0,1,0,0 );
boolean valueUpdated = helperDB.updateDataDB_TableRatings(drinkName, drinkStrength , drinkSize, 2, 0, 0, 0, 1, 0);
Cursor res = helperDB.getDataDB_TableRating(drinkName, drinkStrength, drinkSize);
Assert.assertFalse(res.getCount()==0);
res.moveToFirst();
Assert.assertEquals (res.getString(8), "1");
}
@Test
public void deleteDataDB_TableRatings() {
String drinkName = "Orange Juice";
String drinkStrength = "Any";
String drinkSize = "Large";
boolean insertRating = helperDB.insertDataDB_TableRatings(drinkName, drinkStrength, drinkSize, 1, 0,0,1,0,0 );
helperDB.deleteDataDB_TableRatings (drinkName, drinkStrength, drinkSize);
}
}
我還在 build.gradle 文件中添加了以下幾行:
testImplementation 'junit:junit:4.13'
testImplementation 'org.robolectric:robolectric:3.0'
androidTestImplementation 'androidx.test:runner:1.2.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
你介意告訴我我犯了什么錯誤嗎? 我會很感激每一條評論。
更新:似乎我可能缺少一些依賴項,因此我上傳了帶有依賴項的 build.gradle 文件。 您介意告訴我錯誤是什么以及為什么我無法獲得 Roblectric 的任何上下文嗎?
apply plugin: 'com.android.application'
apply plugin: "androidx.navigation.safeargs"
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.example.td.barapp"
minSdkVersion 15
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
viewBinding {
enabled = true
}
dataBinding {
enabled=true
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
def nav_version = "2.3.0"
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'com.google.android.material:material:1.2.0-alpha06'
testImplementation 'junit:junit:4.13'
testImplementation 'org.robolectric:robolectric:3.0'
androidTestImplementation 'androidx.test:runner:1.2.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
androidTestImplementation 'android.arch.core:core-testing:1.2.1'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
implementation "androidx.recyclerview:recyclerview:1.1.0"
implementation 'androidx.cardview:cardview:1.0.0'
implementation "androidx.navigation:navigation-fragment:$nav_version"
implementation "androidx.navigation:navigation-ui:$nav_version"
}
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