Strange behaviour for tests filtering

[IosephKnecht]

Describe the bug
When specifying a composite filter in marathon plugin configuration, subtraction works strangely.

Imagine that the following android tests are given:

.
└── androidTest
    └── java
        ├── annotation
        │   └── SomeTestAnnotation.kt
        ├── first_part
        │   ├── ExampleInstrumented1Test.kt    <-- annotated test by SomeTestAnnotation
        │   ├── ExampleInstrumented2Test.kt
        │   └── ExampleInstrumented3Test.kt
        └── second_part
            ├── ExampleInstrumented4Test.kt
            ├── ExampleInstrumented5Test.kt
            └── ExampleInstrumented6Test.kt

Next, specify the following filter in build.gradle.kts file:

marathon {
    // omitted code
    filteringConfiguration {
        val unionFilterList = listOf(
            TestPackageFilterConfiguration(regex = "first_part.*".toRegex()),
            TestPackageFilterConfiguration(regex = "second_part.*".toRegex())
        )

        val unionFilterConfiguration = CompositionFilterConfiguration(
            filters = unionFilterList,
            op = CompositionFilterConfiguration.OPERATION.UNION
        )

        val annotationFilterConfiguration = AnnotationFilterConfiguration(
            values = listOf("annotation.SomeTestAnnotation")
        )

        allowlist {
            add(
                CompositionFilterConfiguration(
                    filters = listOf(
                        unionFilterConfiguration,
                        annotationFilterConfiguration
                    ),
                    op = CompositionFilterConfiguration.OPERATION.SUBTRACT
                )
            )
        }
    }
}

It seems that when subtracting sets (ExampleInstrumented1Test, ExampleInstrumented2Test, ExampleInstrumented3Test, ExampleInstrumented4Test, ExampleInstrumented5Test, ExampleInstrumented6Test) and (ExampleInstrumented1Test) should have turned out (ExampleInstrumented2Test, ExampleInstrumented3Test, ExampleInstrumented4Test, ExampleInstrumented5Test, ExampleInstrumented6Test), however, for some reason it turns out an empty set and marathon does not plan a single test.

To Reproduce
Steps to reproduce the behaviour:

1. extract zip with project marathon-filter-playground-main.zip
2. execute in terminal from project folder ./gradlew :app:marathonDebugAndroidTest
3. see output there will be something like this:

I 18:58:24.363 [main @coroutine#2] <com.malinskiy.marathon.Marathon> Scheduling 0 tests

Expected behavior
I would expect correct subtraction of sets when creating a composite filter.
P.S
Maybe I don't know something and it's not really a bug.

Logs and reports
marathon_filter_playground.log
marathon-filter-playground.zip

Devices (please complete the following information):

• Device: Emulator
• OS: Android 11

Additional context
Reproduced on marathon versions 0.7.6/0.8.0

[Malinskiy]

Possibly fixed by #834

[IosephKnecht]

@Malinskiy Great, thanks.