import org.checkerframework.checker.nullness.qual.*;
import org.checkerframework.checker.nullness.qual.EnsuresNonNullIf;

/**
 * Test case for issue 62: https://github.com/typetools/checker-framework/issues/62
 *
 * @skip-test
 */
public class AssertIfTrueTest {

    static String killfile_filter = "";

    public static void fromDir(File1 dbdir) {
        if (!dbdir.isDirectory()) {
            throw new Error("Not a directory: " + dbdir);
        }
        File1 @NonNull [] files = dbdir.listFiles(killfile_filter);
    }

    ///////////////////////////////////////////////////////////////////////////
    /// Classes copied from the annotated JDK
    ///

    // NOTE:  These annotations are actually incorrect (& not in the JDK
    // any more).  But, the test remains valid in how it exercises nullness
    // checking.

    public class File1 {
        @EnsuresNonNullIf(
            result = true,
            expression = {
                "list()",
                "list(String)",
                "listFiles()",
                "listFiles(String)",
                "listFiles(Double)"
            }
        )
        public boolean isDirectory() {
            throw new RuntimeException("skeleton method");
        }

        public String @Nullable [] list() {
            throw new RuntimeException("skeleton method");
        }

        public String @Nullable [] list(@Nullable String FilenameFilter_a1) {
            throw new RuntimeException("skeleton method");
        }

        public File1 @Nullable [] listFiles() {
            throw new RuntimeException("skeleton method");
        }

        public File1 @Nullable [] listFiles(@Nullable String FilenameFilter_a1) {
            throw new RuntimeException("skeleton method");
        }

        public File1 @Nullable [] listFiles(@Nullable Double FileFilter_a1) {
            throw new RuntimeException("skeleton method");
        }
    }
}