No suitable driver found for Postgresql with TestContainers since Quarkus 1.8

Describe the bug

I have a TestContainers test that pings a Postgres DB. This test does not actually use Quarkus but I realized that it was working in 1.7.3 and failing in 1.8.

It is not a stopper for me (as I said, I realized I should have taken the @QuarkusTest annotation) but it sounds that something has been introduced that it makes this test fail (this test has been working since Quarkus 1.6 at least).

Expected behavior

The test should pass as in 1.7.3

Actual behavior

The test fail with:

java.sql.SQLException: No suitable driver found for jdbc:postgresql://localhost:32831/vintageStoreDB?loggerLevel=OFF
        at org.acme.PingPostgreSQLTest.shouldPingPostgreSQL(PingPostgreSQLTest.java:32)

To Reproduce

Generate a brand new Quarkus 1.7.3-Final app with the Postgres extension. Then, add the TestContainers dependency:

  <properties>
   ...
    <testcontainers.version>1.14.3</testcontainers.version>
  </properties>

    <dependency>
      <groupId>org.testcontainers</groupId>
      <artifactId>postgresql</artifactId>
      <version>${testcontainers.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.testcontainers</groupId>
      <artifactId>junit-jupiter</artifactId>
      <version>${testcontainers.version}</version>
      <scope>test</scope>
    </dependency>

Now create a new Test

@QuarkusTest
@Testcontainers
public class PingPostgreSQLTest {

  @Container
  public static PostgreSQLContainer pg = new PostgreSQLContainer<>("postgres:12.4")
    .withDatabaseName("vintageStoreDB")
    .withUsername("vintage")
    .withPassword("vintage")
    .withExposedPorts(5432);

  @Test
  public void shouldPingPostgreSQL() throws Exception {
    pg.start();

    try (Connection con = DriverManager.getConnection(pg.getJdbcUrl(), pg.getUsername(), pg.getPassword());
         Statement st = con.createStatement();
         ResultSet rs = st.executeQuery("SELECT VERSION()")) {

      if (rs.next()) {
        assertTrue(rs.getString(1).contains("PostgreSQL 12"));
      } else {
        throw new Exception();
      }
    }

    pg.stop();
  }
}

This test just uses TestContainers to ping a Postgres db. It doesn’t use any Quarkus. In fact, if you leave the @QuarkusTest annotation it also works. Then, move to Quarkus 1.8.0, it fails.

Configuration

The test with 1.7.3 works even without any application.properties file declaring a Postgres driver or JDBC URL. Because it is now failing with 1.8 I tried to add quarkus.datasource.db-kind=postgresql and so on.

Environment (please complete the following information):

• Output of uname -a or ver: Darwin iMac-Pro-de-Antonio.local 19.6.0 Darwin Kernel Version 19.6.0: Thu Jun 18 20:49:00 PDT 2020; root:xnu-6153.141.1~1/RELEASE_X86_64 x86_64
• Output of java -version: java version “11.0.6” 2020-01-14 LTS
• GraalVM version (if different from Java):
• Quarkus version or git rev: 1.8.0-Final
• Build tool (ie. output of mvnw --version or gradlew --version): 3.6.3_1

Additional context (Add any other context about the problem here.)

[agoncal]

Just tested with Quarkus 1.8.2 and its ok now.

[agoncal]

Hum… I’ve tried to invoke DriverManager.getDrivers() before getting the connection, but it does not work.