// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/strings/string_split.h"
#include <stddef.h>
#include "base/macros.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
using ::testing::ElementsAre;
namespace base {
class SplitStringIntoKeyValuePairsTest : public testing::Test {
protected:
base::StringPairs kv_pairs;
};
TEST_F(SplitStringIntoKeyValuePairsTest, EmptyString) {
EXPECT_TRUE(SplitStringIntoKeyValuePairs(std::string(),
':', // Key-value delimiter
',', // Key-value pair delimiter
&kv_pairs));
EXPECT_TRUE(kv_pairs.empty());
}
TEST_F(SplitStringIntoKeyValuePairsTest, MissingKeyValueDelimiter) {
EXPECT_FALSE(SplitStringIntoKeyValuePairs("key1,key2:value2",
':', // Key-value delimiter
',', // Key-value pair delimiter
&kv_pairs));
ASSERT_EQ(2U, kv_pairs.size());
EXPECT_TRUE(kv_pairs[0].first.empty());
EXPECT_TRUE(kv_pairs[0].second.empty());
EXPECT_EQ("key2", kv_pairs[1].first);
EXPECT_EQ("value2", kv_pairs[1].second);
}
TEST_F(SplitStringIntoKeyValuePairsTest, EmptyKeyWithKeyValueDelimiter) {
EXPECT_TRUE(SplitStringIntoKeyValuePairs(":value1,key2:value2",
':', // Key-value delimiter
',', // Key-value pair delimiter
&kv_pairs));
ASSERT_EQ(2U, kv_pairs.size());
EXPECT_TRUE(kv_pairs[0].first.empty());
EXPECT_EQ("value1", kv_pairs[0].second);
EXPECT_EQ("key2", kv_pairs[1].first);
EXPECT_EQ("value2", kv_pairs[1].second);
}
TEST_F(SplitStringIntoKeyValuePairsTest, TrailingAndLeadingPairDelimiter) {
EXPECT_TRUE(SplitStringIntoKeyValuePairs(",key1:value1,key2:value2,",
':', // Key-value delimiter
',', // Key-value pair delimiter
&kv_pairs));
ASSERT_EQ(2U, kv_pairs.size());
EXPECT_EQ("key1", kv_pairs[0].first);
EXPECT_EQ("value1", kv_pairs[0].second);
EXPECT_EQ("key2", kv_pairs[1].first);
EXPECT_EQ("value2", kv_pairs[1].second);
}
TEST_F(SplitStringIntoKeyValuePairsTest, EmptyPair) {
EXPECT_TRUE(SplitStringIntoKeyValuePairs("key1:value1,,key3:value3",
':', // Key-value delimiter
',', // Key-value pair delimiter
&kv_pairs));
ASSERT_EQ(2U, kv_pairs.size());
EXPECT_EQ("key1", kv_pairs[0].first);
EXPECT_EQ("value1", kv_pairs[0].second);
EXPECT_EQ("key3", kv_pairs[1].first);
EXPECT_EQ("value3", kv_pairs[1].second);
}
TEST_F(SplitStringIntoKeyValuePairsTest, EmptyValue) {
EXPECT_FALSE(SplitStringIntoKeyValuePairs("key1:,key2:value2",
':', // Key-value delimiter
',', // Key-value pair delimiter
&kv_pairs));
ASSERT_EQ(2U, kv_pairs.size());
EXPECT_EQ("key1", kv_pairs[0].first);
EXPECT_EQ("", kv_pairs[0].second);
EXPECT_EQ("key2", kv_pairs[1].first);
EXPECT_EQ("value2", kv_pairs[1].second);
}
TEST_F(SplitStringIntoKeyValuePairsTest, UntrimmedWhitespace) {
EXPECT_TRUE(SplitStringIntoKeyValuePairs("key1 : value1",
':', // Key-value delimiter
',', // Key-value pair delimiter
&kv_pairs));
ASSERT_EQ(1U, kv_pairs.size());
EXPECT_EQ("key1 ", kv_pairs[0].first);
EXPECT_EQ(" value1", kv_pairs[0].second);
}
TEST_F(SplitStringIntoKeyValuePairsTest, TrimmedWhitespace) {
EXPECT_TRUE(SplitStringIntoKeyValuePairs("key1:value1 , key2:value2",
':', // Key-value delimiter
',', // Key-value pair delimiter
&kv_pairs));
ASSERT_EQ(2U, kv_pairs.size());
EXPECT_EQ("key1", kv_pairs[0].first);
EXPECT_EQ("value1", kv_pairs[0].second);
EXPECT_EQ("key2", kv_pairs[1].first);
EXPECT_EQ("value2", kv_pairs[1].second);
}
TEST_F(SplitStringIntoKeyValuePairsTest, MultipleKeyValueDelimiters) {
EXPECT_TRUE(SplitStringIntoKeyValuePairs("key1:::value1,key2:value2",
':', // Key-value delimiter
',', // Key-value pair delimiter
&kv_pairs));
ASSERT_EQ(2U, kv_pairs.size());
EXPECT_EQ("key1", kv_pairs[0].first);
EXPECT_EQ("value1", kv_pairs[0].second);
EXPECT_EQ("key2", kv_pairs[1].first);
EXPECT_EQ("value2", kv_pairs[1].second);
}
TEST_F(SplitStringIntoKeyValuePairsTest, OnlySplitAtGivenSeparator) {
std::string a("a ?!@#$%^&*()_+:/{}\\\t\nb");
EXPECT_TRUE(SplitStringIntoKeyValuePairs(a + "X" + a + "Y" + a + "X" + a,
'X', // Key-value delimiter
'Y', // Key-value pair delimiter
&kv_pairs));
ASSERT_EQ(2U, kv_pairs.size());
EXPECT_EQ(a, kv_pairs[0].first);
EXPECT_EQ(a, kv_pairs[0].second);
EXPECT_EQ(a, kv_pairs[1].first);
EXPECT_EQ(a, kv_pairs[1].second);
}
TEST_F(SplitStringIntoKeyValuePairsTest, DelimiterInValue) {
EXPECT_TRUE(SplitStringIntoKeyValuePairs("key1:va:ue1,key2:value2",
':', // Key-value delimiter
',', // Key-value pair delimiter
&kv_pairs));
ASSERT_EQ(2U, kv_pairs.size());
EXPECT_EQ("key1", kv_pairs[0].first);
EXPECT_EQ("va:ue1", kv_pairs[0].second);
EXPECT_EQ("key2", kv_pairs[1].first);
EXPECT_EQ("value2", kv_pairs[1].second);
}
TEST(SplitStringUsingSubstrTest, EmptyString) {
std::vector<std::string> results = SplitStringUsingSubstr(
std::string(), "DELIMITER", TRIM_WHITESPACE, SPLIT_WANT_ALL);
ASSERT_EQ(1u, results.size());
EXPECT_THAT(results, ElementsAre(""));
}
TEST(StringUtilTest, SplitString_Basics) {
std::vector<std::string> r;
r = SplitString(std::string(), ",:;", KEEP_WHITESPACE, SPLIT_WANT_ALL);
EXPECT_TRUE(r.empty());
// Empty separator list
r = SplitString("hello, world", "", KEEP_WHITESPACE, SPLIT_WANT_ALL);
ASSERT_EQ(1u, r.size());
EXPECT_EQ("hello, world", r[0]);
// Should split on any of the separators.
r = SplitString("::,,;;", ",:;", KEEP_WHITESPACE, SPLIT_WANT_ALL);
ASSERT_EQ(7u, r.size());
for (auto str : r)
ASSERT_TRUE(str.empty());
r = SplitString("red, green; blue:", ",:;", TRIM_WHITESPACE,
SPLIT_WANT_NONEMPTY);
ASSERT_EQ(3u, r.size());
EXPECT_EQ("red", r[0]);
EXPECT_EQ("green", r[1]);
EXPECT_EQ("blue", r[2]);
// Want to split a string along whitespace sequences.
r = SplitString(" red green \tblue\n", " \t\n", TRIM_WHITESPACE,
SPLIT_WANT_NONEMPTY);
ASSERT_EQ(3u, r.size());
EXPECT_EQ("red", r[0]);
EXPECT_EQ("green", r[1]);
EXPECT_EQ("blue", r[2]);
// Weird case of splitting on spaces but not trimming.
r = SplitString(" red ", " ", TRIM_WHITESPACE, SPLIT_WANT_ALL);
ASSERT_EQ(3u, r.size());
EXPECT_EQ("", r[0]); // Before the first space.
EXPECT_EQ("red", r[1]);
EXPECT_EQ("", r[2]); // After the last space.
}
TEST(StringUtilTest, SplitString_WhitespaceAndResultType) {
std::vector<std::string> r;
// Empty input handling.
r = SplitString(std::string(), ",", KEEP_WHITESPACE, SPLIT_WANT_ALL);
EXPECT_TRUE(r.empty());
r = SplitString(std::string(), ",", KEEP_WHITESPACE, SPLIT_WANT_NONEMPTY);
EXPECT_TRUE(r.empty());
// Input string is space and we're trimming.
r = SplitString(" ", ",", TRIM_WHITESPACE, SPLIT_WANT_ALL);
ASSERT_EQ(1u, r.size());
EXPECT_EQ("", r[0]);
r = SplitString(" ", ",", TRIM_WHITESPACE, SPLIT_WANT_NONEMPTY);
EXPECT_TRUE(r.empty());
// Test all 4 combinations of flags on ", ,".
r = SplitString(", ,", ",", KEEP_WHITESPACE, SPLIT_WANT_ALL);
ASSERT_EQ(3u, r.size());
EXPECT_EQ("", r[0]);
EXPECT_EQ(" ", r[1]);
EXPECT_EQ("", r[2]);
r = SplitString(", ,", ",", KEEP_WHITESPACE, SPLIT_WANT_NONEMPTY);
ASSERT_EQ(1u, r.size());
ASSERT_EQ(" ", r[0]);
r = SplitString(", ,", ",", TRIM_WHITESPACE, SPLIT_WANT_ALL);
ASSERT_EQ(3u, r.size());
EXPECT_EQ("", r[0]);
EXPECT_EQ("", r[1]);
EXPECT_EQ("", r[2]);
r = SplitString(", ,", ",", TRIM_WHITESPACE, SPLIT_WANT_NONEMPTY);
ASSERT_TRUE(r.empty());
}
TEST(SplitStringUsingSubstrTest, StringWithNoDelimiter) {
std::vector<std::string> results = SplitStringUsingSubstr(
"alongwordwithnodelimiter", "DELIMITER", TRIM_WHITESPACE,
SPLIT_WANT_ALL);
ASSERT_EQ(1u, results.size());
EXPECT_THAT(results, ElementsAre("alongwordwithnodelimiter"));
}
TEST(SplitStringUsingSubstrTest, LeadingDelimitersSkipped) {
std::vector<std::string> results = SplitStringUsingSubstr(
"DELIMITERDELIMITERDELIMITERoneDELIMITERtwoDELIMITERthree",
"DELIMITER", TRIM_WHITESPACE, SPLIT_WANT_ALL);
ASSERT_EQ(6u, results.size());
EXPECT_THAT(results, ElementsAre("", "", "", "one", "two", "three"));
}
TEST(SplitStringUsingSubstrTest, ConsecutiveDelimitersSkipped) {
std::vector<std::string> results = SplitStringUsingSubstr(
"unoDELIMITERDELIMITERDELIMITERdosDELIMITERtresDELIMITERDELIMITERcuatro",
"DELIMITER", TRIM_WHITESPACE, SPLIT_WANT_ALL);
ASSERT_EQ(7u, results.size());
EXPECT_THAT(results, ElementsAre("uno", "", "", "dos", "tres", "", "cuatro"));
}
TEST(SplitStringUsingSubstrTest, TrailingDelimitersSkipped) {
std::vector<std::string> results = SplitStringUsingSubstr(
"unDELIMITERdeuxDELIMITERtroisDELIMITERquatreDELIMITERDELIMITERDELIMITER",
"DELIMITER", TRIM_WHITESPACE, SPLIT_WANT_ALL);
ASSERT_EQ(7u, results.size());
EXPECT_THAT(
results, ElementsAre("un", "deux", "trois", "quatre", "", "", ""));
}
TEST(SplitStringPieceUsingSubstrTest, StringWithNoDelimiter) {
std::vector<base::StringPiece> results =
SplitStringPieceUsingSubstr("alongwordwithnodelimiter", "DELIMITER",
base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
ASSERT_EQ(1u, results.size());
EXPECT_THAT(results, ElementsAre("alongwordwithnodelimiter"));
}
TEST(SplitStringPieceUsingSubstrTest, LeadingDelimitersSkipped) {
std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
"DELIMITERDELIMITERDELIMITERoneDELIMITERtwoDELIMITERthree", "DELIMITER",
base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
ASSERT_EQ(6u, results.size());
EXPECT_THAT(results, ElementsAre("", "", "", "one", "two", "three"));
}
TEST(SplitStringPieceUsingSubstrTest, ConsecutiveDelimitersSkipped) {
std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
"unoDELIMITERDELIMITERDELIMITERdosDELIMITERtresDELIMITERDELIMITERcuatro",
"DELIMITER", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
ASSERT_EQ(7u, results.size());
EXPECT_THAT(results, ElementsAre("uno", "", "", "dos", "tres", "", "cuatro"));
}
TEST(SplitStringPieceUsingSubstrTest, TrailingDelimitersSkipped) {
std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
"unDELIMITERdeuxDELIMITERtroisDELIMITERquatreDELIMITERDELIMITERDELIMITER",
"DELIMITER", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
ASSERT_EQ(7u, results.size());
EXPECT_THAT(results,
ElementsAre("un", "deux", "trois", "quatre", "", "", ""));
}
TEST(SplitStringPieceUsingSubstrTest, KeepWhitespace) {
std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
"un DELIMITERdeux\tDELIMITERtrois\nDELIMITERquatre", "DELIMITER",
base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
ASSERT_EQ(4u, results.size());
EXPECT_THAT(results, ElementsAre("un ", "deux\t", "trois\n", "quatre"));
}
TEST(SplitStringPieceUsingSubstrTest, TrimWhitespace) {
std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
"un DELIMITERdeux\tDELIMITERtrois\nDELIMITERquatre", "DELIMITER",
base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
ASSERT_EQ(4u, results.size());
EXPECT_THAT(results, ElementsAre("un", "deux", "trois", "quatre"));
}
TEST(SplitStringPieceUsingSubstrTest, SplitWantAll) {
std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
"unDELIMITERdeuxDELIMITERtroisDELIMITERDELIMITER", "DELIMITER",
base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
ASSERT_EQ(5u, results.size());
EXPECT_THAT(results, ElementsAre("un", "deux", "trois", "", ""));
}
TEST(SplitStringPieceUsingSubstrTest, SplitWantNonEmpty) {
std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
"unDELIMITERdeuxDELIMITERtroisDELIMITERDELIMITER", "DELIMITER",
base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
ASSERT_EQ(3u, results.size());
EXPECT_THAT(results, ElementsAre("un", "deux", "trois"));
}
TEST(StringSplitTest, StringSplitKeepWhitespace) {
std::vector<std::string> r;
r = SplitString(" ", "*", base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
ASSERT_EQ(1U, r.size());
EXPECT_EQ(r[0], " ");
r = SplitString("\t \ta\t ", "\t", base::KEEP_WHITESPACE,
base::SPLIT_WANT_ALL);
ASSERT_EQ(4U, r.size());
EXPECT_EQ(r[0], "");
EXPECT_EQ(r[1], " ");
EXPECT_EQ(r[2], "a");
EXPECT_EQ(r[3], " ");
r = SplitString("\ta\t\nb\tcc", "\n", base::KEEP_WHITESPACE,
base::SPLIT_WANT_ALL);
ASSERT_EQ(2U, r.size());
EXPECT_EQ(r[0], "\ta\t");
EXPECT_EQ(r[1], "b\tcc");
}
TEST(StringSplitTest, SplitStringAlongWhitespace) {
struct TestData {
const char* input;
const size_t expected_result_count;
const char* output1;
const char* output2;
} data[] = {
{ "a", 1, "a", "" },
{ " ", 0, "", "" },
{ " a", 1, "a", "" },
{ " ab ", 1, "ab", "" },
{ " ab c", 2, "ab", "c" },
{ " ab c ", 2, "ab", "c" },
{ " ab cd", 2, "ab", "cd" },
{ " ab cd ", 2, "ab", "cd" },
{ " \ta\t", 1, "a", "" },
{ " b\ta\t", 2, "b", "a" },
{ " b\tat", 2, "b", "at" },
{ "b\tat", 2, "b", "at" },
{ "b\t at", 2, "b", "at" },
};
for (size_t i = 0; i < arraysize(data); ++i) {
std::vector<std::string> results = base::SplitString(
data[i].input, kWhitespaceASCII, base::KEEP_WHITESPACE,
base::SPLIT_WANT_NONEMPTY);
ASSERT_EQ(data[i].expected_result_count, results.size());
if (data[i].expected_result_count > 0)
ASSERT_EQ(data[i].output1, results[0]);
if (data[i].expected_result_count > 1)
ASSERT_EQ(data[i].output2, results[1]);
}
}
} // namespace base