/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "utils/strings/utf8.h"
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namespace libtextclassifier3 {
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namespace {
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TEST(Utf8Test, GetNumBytesForUTF8Char) {
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EXPECT_EQ(GetNumBytesForUTF8Char("\x00"), 0);
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EXPECT_EQ(GetNumBytesForUTF8Char("h"), 1);
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EXPECT_EQ(GetNumBytesForUTF8Char("😋"), 4);
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EXPECT_EQ(GetNumBytesForUTF8Char("㍿"), 3);
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}
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TEST(Utf8Test, IsValidUTF8) {
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EXPECT_TRUE(IsValidUTF8("1234😋hello", 13));
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EXPECT_TRUE(IsValidUTF8("\u304A\u00B0\u106B", 8));
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EXPECT_TRUE(IsValidUTF8("this is a test😋😋😋", 26));
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EXPECT_TRUE(IsValidUTF8("\xf0\x9f\x98\x8b", 4));
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// Too short (string is too short).
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EXPECT_FALSE(IsValidUTF8("\xf0\x9f", 2));
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// Too long (too many trailing bytes).
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EXPECT_FALSE(IsValidUTF8("\xf0\x9f\x98\x8b\x8b", 5));
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// Too short (too few trailing bytes).
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EXPECT_FALSE(IsValidUTF8("\xf0\x9f\x98\x61\x61", 5));
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}
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TEST(Utf8Test, ValidUTF8CharLength) {
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EXPECT_EQ(ValidUTF8CharLength("1234😋hello", 13), 1);
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EXPECT_EQ(ValidUTF8CharLength("\u304A\u00B0\u106B", 8), 3);
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EXPECT_EQ(ValidUTF8CharLength("this is a test😋😋😋", 26), 1);
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EXPECT_EQ(ValidUTF8CharLength("\xf0\x9f\x98\x8b", 4), 4);
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// Too short (string is too short).
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EXPECT_EQ(ValidUTF8CharLength("\xf0\x9f", 2), -1);
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// Too long (too many trailing bytes). First character is valid.
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EXPECT_EQ(ValidUTF8CharLength("\xf0\x9f\x98\x8b\x8b", 5), 4);
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// Too short (too few trailing bytes).
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EXPECT_EQ(ValidUTF8CharLength("\xf0\x9f\x98\x61\x61", 5), -1);
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}
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} // namespace
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} // namespace libtextclassifier3
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