1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "utils/checksum.h" 18 #include "gtest/gtest.h" 19 20 namespace libtextclassifier3 { 21 namespace { 22 23 TEST(LuhnTest, CorrectlyHandlesSimpleCases) { 24 EXPECT_TRUE(VerifyLuhnChecksum("3782 8224 6310 005")); 25 EXPECT_FALSE(VerifyLuhnChecksum("0")); 26 EXPECT_FALSE(VerifyLuhnChecksum("1")); 27 EXPECT_FALSE(VerifyLuhnChecksum("0A")); 28 } 29 30 TEST(LuhnTest, CorrectlyVerifiesPaymentCardNumbers) { 31 // Fake test numbers. 32 EXPECT_TRUE(VerifyLuhnChecksum("3782 8224 6310 005")); 33 EXPECT_TRUE(VerifyLuhnChecksum("371449635398431")); 34 EXPECT_TRUE(VerifyLuhnChecksum("5610591081018250")); 35 EXPECT_TRUE(VerifyLuhnChecksum("38520000023237")); 36 EXPECT_TRUE(VerifyLuhnChecksum("6011000990139424")); 37 EXPECT_TRUE(VerifyLuhnChecksum("3566002020360505")); 38 EXPECT_TRUE(VerifyLuhnChecksum("5105105105105100")); 39 EXPECT_TRUE(VerifyLuhnChecksum("4012 8888 8888 1881")); 40 } 41 42 TEST(LuhnTest, HandlesWhitespace) { 43 EXPECT_TRUE( 44 VerifyLuhnChecksum("3782 8224 6310 005 ", /*ignore_whitespace=*/true)); 45 EXPECT_FALSE( 46 VerifyLuhnChecksum("3782 8224 6310 005 ", /*ignore_whitespace=*/false)); 47 } 48 49 TEST(LuhnTest, HandlesEdgeCases) { 50 EXPECT_FALSE(VerifyLuhnChecksum(" ", /*ignore_whitespace=*/true)); 51 EXPECT_FALSE(VerifyLuhnChecksum(" ", /*ignore_whitespace=*/false)); 52 EXPECT_FALSE(VerifyLuhnChecksum("", /*ignore_whitespace=*/true)); 53 EXPECT_FALSE(VerifyLuhnChecksum("", /*ignore_whitespace=*/false)); 54 } 55 56 } // namespace 57 } // namespace libtextclassifier3 58
