public Set<File> getTestSourceDirs() {
        return testSourceDirs;
    }

    /**
     * <strong>This field is {@code @Deprecated}, please use {@link #getTestSources()} instead to access the new collection property.</strong>
     */
    @Deprecated
    public void setTestSourceDirs(Set<File> testSourceDirs) {
        this.testSourceDirs = testSourceDirs;
    }

    /**

            </tr>
            <tr>
                <td>contentRoot</td>
                <td><literal>project.projectDir</literal></td>
                <td/>
            </tr>
            <tr>
                <td>testSourceDirs</td>
                <td><literal>[]</literal></td>
                <td>project.sourceSets.test.allJava</td>
            </tr>
            <tr>
                <td>resourceDirs</td>

                return project.getProjectDir();
            }
        });
        Set<File> testSourceDirs = new LinkedHashSet<>();
        conventionMapping.map("testSourceDirs", new Callable<Set<File>>() {
            @Override
            public Set<File> call() {
                return testSourceDirs;
            }
        });
        Set<File> resourceDirs = new LinkedHashSet<>();

import org.gradle.tooling.model.idea.IdeaModule
import org.gradle.tooling.model.idea.IdeaProject

/**
 * NOTE: Starting with Gradle 5.0 the contract of IdeaModule#sourceDirs and IdeaModule#testSourceDirs changes in
 * a way that the resource directories are excluded.
 */
@TargetGradleVersion(">=5.0")
class ToolingApiIdeaModelCrossVersionSpec extends ToolingApiSpecification {

==== IdeaModule API Cleanup

The deprecated `testSourceDirs` and `testResourceDirs` properties of the `IdeaModule` type have been removed.
This affects the `org.gradle.plugins.ide.idea.model.IdeaModule` type, not the `org.gradle.tooling.model.idea.IdeaModule` type.