I have built a contact app and am trying to learn to write tests. At the moment my TestAddContact passes, except every time I run it, it is actually adding the data to the apps database. How can I make it so the test does not add to the actual apps data?
package com.domscott.contactapplication;
import android.content.Context;
import android.database.Cursor;
import androidx.test.core.app.ApplicationProvider;
import androidx.test.ext.junit.runners.AndroidJUnit4;
import junit.framework.TestCase;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnitRunner;
import java.util.ArrayList;
import static org.junit.Assert.*;
@RunWith(AndroidJUnit4.class)
public class MyDatabaseHelperTest {
private MyDatabaseHelper database;
@Before
public void setUp() throws Exception {
database = new MyDatabaseHelper(ApplicationProvider.getApplicationContext());
}
@After
public void tearDown() {
database.close();
}
@Test
public void TestAddContact() {
ArrayList<String> idTest = new ArrayList<>();
ArrayList<String> f_nameTest = new ArrayList<>();
ArrayList<String> l_nameTest = new ArrayList<>();
ArrayList<String> phoneTest = new ArrayList<>();
database.addContact("dom","scott", "123");
Cursor cursor = database.readData();
while (cursor.moveToNext()) {
idTest.add(cursor.getString(0));
f_nameTest.add(cursor.getString(1));
l_nameTest.add(cursor.getString(2));
phoneTest.add(cursor.getString(3));
Assert.assertEquals(f_nameTest.get(0), "dom");
}
}
}
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