Tests using @FlywayTest(locationsForMigrate) failing after changing spring and flyway versions

[MateusTymoniuk]

Hi!

We've been using zonky to test our repositories and it's been great! Our application uses springboot version 2.7.10, embedded-database-spring-test version 2.4.0 and flyway-core version 7.0.4.

Lately we've started to upgrade to springboot version 3.1.6, and with this, we needed to upgrade the flyway-core lib as well to version 9.22.3. With this update, our tests started to fail, because they couldn't initialize the application, as the following exception was thrown:

java.lang.NullPointerException: Cannot invoke "org.flywaydb.core.api.ResourceProvider.getResources(String, String[])" because "resourceProvider" is null

    at org.flywaydb.core.api.migration.baseline.BaselineMigrationResolver.addMigrations(BaselineMigrationResolver.java:77)
    at org.flywaydb.core.api.migration.baseline.BaselineMigrationResolver.resolveMigrations(BaselineMigrationResolver.java:53)
    at org.flywaydb.core.internal.resolver.CompositeMigrationResolver.lambda$collectMigrations$0(CompositeMigrationResolver.java:127)
    at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:273)
    at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1708)
    at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
    at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
    at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
    at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
    at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
    at org.flywaydb.core.internal.resolver.CompositeMigrationResolver.collectMigrations(CompositeMigrationResolver.java:128)
    at org.flywaydb.core.internal.resolver.CompositeMigrationResolver.doFindAvailableMigrations(CompositeMigrationResolver.java:117)
    at org.flywaydb.core.internal.resolver.CompositeMigrationResolver.resolveMigrations(CompositeMigrationResolver.java:107)
    at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
    at java.base/java.lang.reflect.Method.invoke(Method.java:580)
    at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:285)
    at io.zonky.test.db.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:75)
    at io.zonky.test.db.flyway.FlywayWrapper.getMigrations(FlywayWrapper.java:99)
    at io.zonky.test.db.flyway.FlywayDatabaseExtension.lambda$resolveMigrations$6(FlywayDatabaseExtension.java:349)
    at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
    at io.zonky.test.db.flyway.FlywayDatabaseExtension.resolveMigrations(FlywayDatabaseExtension.java:349)
    at io.zonky.test.db.flyway.FlywayDatabaseExtension.findFirstVersion(FlywayDatabaseExtension.java:327)
    at io.zonky.test.db.flyway.FlywayDatabaseExtension.isAppendable(FlywayDatabaseExtension.java:310)
    at io.zonky.test.db.flyway.FlywayDatabaseExtension.isAppendable(FlywayDatabaseExtension.java:293)
    at io.zonky.test.db.flyway.FlywayDatabaseExtension.processPendingOperations(FlywayDatabaseExtension.java:127)
    at io.zonky.test.db.flyway.OptimizedFlywayTestExecutionListener.processPendingFlywayOperations(OptimizedFlywayTestExecutionListener.java:108)
    at io.zonky.test.db.flyway.OptimizedFlywayTestExecutionListener.beforeTestClass(OptimizedFlywayTestExecutionListener.java:60)
    at org.springframework.test.context.TestContextManager.beforeTestClass(TestContextManager.java:220)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:60)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38)
    at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:232)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:55)

This seems to be caused because I use a different path for some test migrations, so my test class includes the @FlywayTest(locationsForMigrate = "testdata") annotation, and once it tries to get and execute those migrations, the context that FlywayWrapper passes to BaselineMigrationResolver is null.

Can you help me find out what the problem is? I wonder if there is any configuration that I'm missing to set, because I had to upgrade major versions for both springboot and flyway so this might be the case.

I've created a sample repository, where I could reproduce the error I was getting, so you can analyse and reproduce it as well.

Here's the link to the repo

Thanks in advance for your time!

[tomix26]

Hi @MateusTymoniuk, thanks for reporting the issue and for the reproducer. I'll try to fix it as soon as possible.

[tomix26]

The new version has been released, you can try it out.

[MateusTymoniuk]

Hey @tomix26, thanks a lot for the fix! I changed all my tests back using @FlywayTest. Works like a charm now!