Firebase | Firestore | Firestore junit test | deep stubbing mockito

This is a sample code how to perform deep stubbing mockito on firestore

you need to mock all the 

public class FirestoreClientTest{

@Mock

Firestore firestore;

@Mock

DocumentReference documentReference;

@Mock

CollectionReference collectionReference;

@Mock

ApiFuture apiFuture;

@Mock

QuerySnapshot querySnapshot;

@Test

public void test(){

when(firestore.collection(any(String.class)).thenReturn(collectionReference);

when(collectionReference.document(any(String.class)).thenReturn(documentReference);

when(documentReference.get()).thenReturn(apiFuture);

when(apiFuture.get()).thenReturn(querySnapshot);

UserInfo userInfo = firestore.getUserDetails();

//Assert statements

}

}

Google Firebase Firestore Spring boot Integration sample code

1. Create a new Cloud Firestore database in your GCP project

2. If you are authenticated in the Cloud SDK, your credentials will be automatically found by the Spring Boot Starter for Google Cloud Firestore.

3. Pom dependency

<!-- https://mvnrepository.com/artifact/com.google.cloud/spring-cloud-gcp-starter -->

<dependency>

    <groupId>com.google.cloud</groupId>

    <artifactId>spring-cloud-gcp-starter</artifactId>

    <version>2.0.4</version>

</dependency>

<!-- https://mvnrepository.com/artifact/com.google.cloud/google-cloud-firestore -->

<dependency>

    <groupId>com.google.cloud</groupId>

    <artifactId>google-cloud-firestore</artifactId>

    <version>3.0.1</version>

</dependency>

4. Repository (writing data)

@Autowired

Firestore firestore;

User data = new User("javabelazy",

Arrays.asList(

new Phone(12345, PhoneType.CELL),

new Phone(54321, PhoneType.WORK)));

WriteResult writeResult = this.firestore.document("users/id").set(data).get();

5. Application.properties

spring.cloud.gcp.firestore.project-id =abcdefg

6. Git URL

https://github.com/javabelazy/FlightBooking

find word between two strings using regular expression in java

https://github.com/javabelazy/ProgramingSkills/blob/bd3ad6517b7ae61803918da279b96712d2329b73/src/com/steffi/ideas/FindingSubstring.java

Pattern p = Pattern.compile("(ID):\\s*(\\w+)");

Matcher m = p.matcher(input);