1 files changed, 45 insertions, 0 deletions
diff --git a/src/test/java/com/keuin/kbackupfabric/backup/incremental/serializer/IncBakupBackwardCompatibilityTest.java b/src/test/java/com/keuin/kbackupfabric/backup/incremental/serializer/IncBakupBackwardCompatibilityTest.java
new file mode 100644
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--- /dev/null
+++ b/src/test/java/com/keuin/kbackupfabric/backup/incremental/serializer/IncBakupBackwardCompatibilityTest.java
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+package com.keuin.kbackupfabric.backup.incremental.serializer;
+
+import com.keuin.kbackupfabric.backup.incremental.ObjectCollection2;
+import com.keuin.kbackupfabric.backup.incremental.ObjectCollectionFactory;
+import com.keuin.kbackupfabric.backup.incremental.ObjectCollectionSerializer;
+import com.keuin.kbackupfabric.backup.incremental.identifier.Sha256Identifier;
+import com.keuin.kbackupfabric.backup.name.IncrementalBackupFileNameEncoder;
+import org.junit.Test;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.time.LocalDateTime;
+import java.time.ZoneOffset;
+
+import static org.junit.Assert.*;
+
+public class IncBakupBackwardCompatibilityTest {
+
+    private final String customName = "test_backup";
+    private final LocalDateTime backupTime = LocalDateTime.of(2000, 1, 1, 1, 1, 1, 1);
+
+    private final Path testRoot = Paths.get(".\\testfile\\IncBackupBackwardCompatibilityTest");
+    private final File indexFile = new File(testRoot.toString(), new IncrementalBackupFileNameEncoder().encode(customName, backupTime));
+
+    @Test
+    public void testBackwardCompatibility() throws IOException {
+
+        if (!testRoot.toFile().isDirectory()) {
+            if (!testRoot.toFile().mkdirs())
+                fail("Cannot initialize test environment: cannot create path.");
+        }
+
+        // now we make an old-style backup index file
+        ObjectCollectionFactory<Sha256Identifier> factory =
+                new ObjectCollectionFactory<>(Sha256Identifier.getFactory(), 1, 0);
+        ObjectCollection2 collection = factory.fromDirectory(testRoot.toFile());
+        ObjectCollectionSerializer.toFile(collection, indexFile);
+        SavedIncrementalBackup info = IncBackupInfoSerializer.fromFile(indexFile);
+        assertEquals(collection, info.getObjectCollection());
+        assertEquals(customName, info.getBackupName());
+        assertTrue(backupTime.toEpochSecond(ZoneOffset.UTC) - info.getBackupTime().toLocalDateTime().toEpochSecond(ZoneOffset.UTC) <= 2);
+    }
+}