TestCase when running from IntelliJ Run Option - Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

[kunalgithub]

Why its searching for com.mysql.jdbc.Driver

I initialise the test container as ::

@SpringJUnitConfig
@Testcontainers
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
class ApplicationTests {
.....
static final MySQLContainer MY_SQL_CONTAINER;

    static {
        MY_SQL_CONTAINER = new MySQLContainer("mysql:latest");
        MY_SQL_CONTAINER.start();
    }

    @DynamicPropertySource
    static void configureTestProperties(DynamicPropertyRegistry registry) {
        registry.add("spring.datasource.url", () -> MY_SQL_CONTAINER.getJdbcUrl());
        registry.add("spring.datasource.username", () -> MY_SQL_CONTAINER.getUsername());
        registry.add("spring.datasource.password", () -> MY_SQL_CONTAINER.getPassword());
        registry.add("spring.jpa.hibernate.ddl-auto", () -> "create");
        registry.add("spring.datasource.driverClassName", () ->"com.mysql.cj.jdbc.Driver");
    }

My pom.xml

           <dependency>
			<artifactId>testcontainers</artifactId>
			<groupId>org.testcontainers</groupId>
			<version>1.19.4</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.testcontainers</groupId>
			<artifactId>junit-jupiter</artifactId>
			<version>1.19.8</version>
			<scope>test</scope>
		</dependency>
	        <dependency>
			<groupId>com.mysql</groupId>
			<artifactId>mysql-connector-j</artifactId>
			<version>8.4.0</version>
			<scope>runtime</scope>
		</dependency>

Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
	at java.base/java.lang.Class.forName0(Native Method)
	at java.base/java.lang.Class.forName(Class.java:421)
	at java.base/java.lang.Class.forName(Class.java:412)
	at org.testcontainers.containers.JdbcDatabaseContainer.getJdbcDriverInstance(JdbcDatabaseContainer.java:200)
	... 17 more

[eddumelendez]

I can not see any reason why com.mysql.cj.jdbc.Driver has not been picked. Testcontainers MySQL implementation look for two drivers. See https://github.com/testcontainers/testcontainers-java/blob/1.19.4/modules/mysql/src/main/java/org/testcontainers/containers/MySQLContainer.java#L99-L106