add test validateOnOpenCorruptFile() based on corrupt-pageno-in-branch-data.mdb

Author: greenrobot

tests/objectbox-java-test/src/test/java/io/objectbox/AbstractObjectBoxTest.java

@@ -56,23 +56,27 @@ public void setUp() throws IOException {
         Cursor.TRACK_CREATION_STACK = true;
         Transaction.TRACK_CREATION_STACK = true;
 
-        // This works with Android without needing any context
-        File tempFile = File.createTempFile("object-store-test", "");
-        //noinspection ResultOfMethodCallIgnored
-        tempFile.delete();
-        boxStoreDir = tempFile;
-
         if (!printedVersionsOnce) {
             System.out.println("ObjectBox Java version: " + BoxStore.getVersion());
             System.out.println("ObjectBox Core version: " + BoxStore.getVersionNative());
             System.out.println("First DB dir: " + boxStoreDir);
             printedVersionsOnce = true;
         }
 
+        boxStoreDir = prepareTempDir("object-store-test");
         store = createBoxStore();
         runExtensiveTests = System.getProperty("extensive-tests") != null;
     }
 
+    /** This works with Android without needing any context. */
+    protected File prepareTempDir(String prefix) throws IOException {
+        File tempFile = File.createTempFile(prefix, "");
+        if (!tempFile.delete()) {
+            throw new IOException("Could not prep temp dir; file delete failed for " + tempFile.getAbsolutePath());
+        }
+        return tempFile;
+    }
+
     protected BoxStore createBoxStore() {
         return createBoxStore(false);
     }

tests/objectbox-java-test/src/test/java/io/objectbox/BoxStoreBuilderTest.java

@@ -16,11 +16,18 @@
 
 package io.objectbox;
 
+import io.objectbox.exception.FileCorruptException;
 import io.objectbox.model.ValidateOnOpenMode;
+import org.greenrobot.essentials.io.IoUtils;
 import org.junit.Before;
 import org.junit.Test;
 
 
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
 import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
@@ -143,4 +150,27 @@ public void validateOnOpen() {
         assertNotNull(getTestEntityBox().get(id));
         getTestEntityBox().put(new TestEntity(0));
     }
+
+
+    @Test(expected = FileCorruptException.class)
+    public void validateOnOpenCorruptFile() throws IOException {
+        File dir = prepareTempDir("object-store-test-corrupted");
+        assertTrue(dir.mkdir());
+        File badDataFile = new File(dir, "data.mdb");
+        try (InputStream badIn = getClass().getResourceAsStream("corrupt-pageno-in-branch-data.mdb")) {
+            try (FileOutputStream badOut = new FileOutputStream(badDataFile)) {
+                IoUtils.copyAllBytes(badIn, badOut);
+            }
+        }
+        builder = BoxStoreBuilder.createDebugWithoutModel().directory(dir);
+        builder.validateOnOpen(ValidateOnOpenMode.AllBranches);
+        try {
+            store = builder.build();
+        } finally {
+            boolean delOk = badDataFile.delete();
+            delOk &= new File(dir, "lock.mdb").delete();
+            delOk &= dir.delete();
+            assertTrue(delOk);  // Try to delete all before asserting
+        }
+    }
 }