Export libtextclassifier

Test: atest TextClassifierTest.java

Change-Id: Ie1f90395c116ec760a34a0aad80f81ea10e5b32f
diff --git a/utils/test-utils.h b/utils/test-utils.h
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+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Utilities for tests.
+
+#ifndef LIBTEXTCLASSIFIER_UTILS_TEST_UTILS_H_
+#define LIBTEXTCLASSIFIER_UTILS_TEST_UTILS_H_
+
+#include <string>
+
+#include "annotator/types.h"
+
+namespace libtextclassifier3 {
+
+// Returns a list of Tokens for given input string. Can't handle non-ASCII
+// input.
+std::vector<Token> TokenizeAsciiOnSpace(const std::string& text);
+
+}  // namespace  libtextclassifier3
+
+#endif  // LIBTEXTCLASSIFIER_UTILS_TEST_UTILS_H_