我有以下两个用于数据库操作的类。
public class BlackboxSQLiteDatabase implements BlackboxDatabase {
private Context context;
private SQLiteDatabase sqliteDatabase;
private String databaseName;
public static final String IN_MEMORY_DATABASE = null;
private final String SECRET_KEY = "dm13YXJlY";
public BlackboxSQLiteDatabase(Context context, String databaseName, int version) {
this.context = context;
this.databaseName = databaseName;
SQLiteDatabase.loadLibs(context);
SQLiteOpenHelper openHelper = new BlackboxSQLiteOpenHelper(context, databaseName, version);
this.sqliteDatabase = openHelper.getWritableDatabase(SECRET_KEY);
}
@Override
public void beginTransaction() {
sqliteDatabase.beginTransaction();
}
@Override
public void setTransactionSuccessful() {
sqliteDatabase.setTransactionSuccessful();
}
@Override
public void endTransaction() {
sqliteDatabase.endTransaction();
}
@Override
public int getVersion() {
return sqliteDatabase.getVersion();
}
@Override
public void execSQL(String statement) {
sqliteDatabase.execSQL(statement);
}
@Override
public Cursor query(String table, String[] columns, String selection, String[] selectionArgs, String groupBy, String having, String orderBy) {
return sqliteDatabase.query(table, columns, selection, selectionArgs, groupBy, having, orderBy);
}
@Override
public long insert(String table, String nullColumnHack, ContentValues values) {
return sqliteDatabase.insert(table, nullColumnHack, values);
}
@Override
public int delete(String table, String whereClause, String[] whereArgs) {
return sqliteDatabase.delete(table, whereClause, whereArgs);
}
@Override
public int update(String table, ContentValues values, String whereClause, String[] whereArgs) {
return sqliteDatabase.update(table, values, whereClause, whereArgs);
}
private static final String DROP_TABLE = "DELETE FROM %s ;";
public void deleteAllData() {
if (isTestStubDatabase()) {
return;
}
try {
sqliteDatabase.beginTransaction();
for (TableSchema tableSchema : BlackboxDatabaseSchema.TABLE_SCHEMAS) {
String dropCommand = String.format(DROP_TABLE, tableSchema.getTableName());
sqliteDatabase.execSQL(dropCommand);
}
sqliteDatabase.setTransactionSuccessful();
} finally {
sqliteDatabase.endTransaction();
}
}
private boolean isTestStubDatabase() {
return databaseName == IN_MEMORY_DATABASE;
}
}
和
public class BlackboxSQLiteOpenHelper extends SQLiteOpenHelper {
public BlackboxSQLiteOpenHelper(Context context, String name, int version) {
super(context, name, null, version);
}
@Override
public void onCreate(SQLiteDatabase db) {
for (TableSchema tableSchema : BlackboxDatabaseSchema.TABLE_SCHEMAS) {
db.execSQL(tableSchema.getCreateStatement());
}
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
throw new UnrecoverableException("TODO: implement database upgrade");
}
}
然后我正在尝试为 deleteAllData() 方法编写单元测试
public class BlackboxSQLiteDatabaseTests extends InstrumentationTestCase {
public static final String IN_MEMORY_DATABASE = null;
private Context context;
private BlackboxClient blackboxClient;
private BlackboxDatabase database;
@Override
protected void setUp() throws Exception {
super.setUp();
/* https://code.google.com/p/dexmaker/issues/detail?id=2
* Observing an error on my Nexus 6P without below fix
* java.lang.IllegalArgumentException: dexcache == null
* (and no default could be found; consider setting the 'dexmaker.dexcache' system property)
*/
System.setProperty("dexmaker.dexcache",
getInstrumentation()
.getTargetContext()
.getCacheDir()
.getPath());
context = getInstrumentation().getTargetContext();
database = new BlackboxSQLiteDatabase(context, "config.db", 1);
}
public void testDeleteAllData() {
//test code
}
}
然后在运行单元测试时出现此错误。
net.sqlcipher.database.SQLiteException: file is encrypted or is not a database: create locale table failed
at net.sqlcipher.database.SQLiteDatabase.native_setLocale(Native Method)
at net.sqlcipher.database.SQLiteDatabase.setLocale(SQLiteDatabase.java:2474)
at net.sqlcipher.database.SQLiteDatabase.openDatabaseInternal(SQLiteDatabase.java:2338)
at net.sqlcipher.database.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1087)
at net.sqlcipher.database.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:1150)
at net.sqlcipher.database.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:162)
at net.sqlcipher.database.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:129)
at com.mc.gc.storage.BlackboxSQLiteDatabase.<init>(BlackboxSQLiteDatabase.java:35)
at com.mc.gc.storage.BlackboxSQLiteDatabaseTests.setUp(BlackboxSQLiteDatabaseTests.java:44)
我肯定每次都使用相同的密钥来打开数据库，因为它是常量。有人可以指出这里可能出现的问题。每次运行测试代码时都会遇到相同的错误。