Omitting Spring Data JPA autowiring during tests - spring

Question

I have a Spring Boot application that uses a library (my own), that has Spring Data JPA dependencies.
Within the library, I'm using JPA repository interfaces and a custom repository fragment that uses a JpaSpecificationExecutor interface.
I have a configuration inside the library to #EnableJpaRepositories, as below:
#EnableJpaRepositories(basePackages = "my.package.domain.jpa.repo", bootstrapMode= BootstrapMode.LAZY)
#EntityScan(basePackageClasses = {LookupConfig.class, LookupMapping.class})
#Configuration
public class LookupJpaConfiguration {}
I have also declared (not generated) the meta-models (with _ appended to the class name) for the entity classes in the same package as the entity classes.
The main application is also a #SpringBootApplication, with spring-boot-starter-parent:2.1.0 as parent. This application uses the library as a dependency, and #Autowire a class from the Library. The application itself does not have direct dependencies on Spring Data.
The problem is, I am unable to run Unit tests without adding properties for the datasource.
This is what the test class's declaration looks like:
#ExtendWith({SpringExtension.class, MockitoExtension.class})
public class OrderStatusProcessorTest {
// Uses the library with JPA dependency
#MockBean private LookupService lookupService;
// The class being tested; uses LookupService
private final OrderStatusProcessor orderStatusProcessor;
public OrderStatusProcessorTest() {
orderStatusProcessor = new OrderStatusProcessor(lookupService);
}
...
I have already tried #Mocking DataSource and EntityManagerFactory, but none of those worked either.
Library's pom file
<properties>
<spring-data-releasetrain.version>Lovelace-SR5</spring-data-releasetrain.version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.3.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
With the current setup, the error I'm seeing is as below --
java.lang.IllegalStateException: Failed to load ApplicationContext
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:125)
at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:108)
...
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Unsatisfied dependency expressed through method 'entityManagerFactory' parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'entityManagerFactoryBuilder' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Unsatisfied dependency expressed through method 'entityManagerFactoryBuilder' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaVendorAdapter' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.JpaVendorAdapter]: Factory method 'jpaVendorAdapter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class
It does work if I provide the datasource properties correctly. But what I want is for the Tests to run without actually connecting to the database.
Let me know if I need to provide more information. Thanks in advance!