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#include "regex_yaml.h"
#include "stream.h"
#include "gtest/gtest.h"
using YAML::RegEx;
using YAML::Stream;
namespace {
const auto MIN_CHAR = Stream::eof() + 1;
TEST(RegExTest, Empty) {
RegEx empty;
EXPECT_TRUE(empty.Matches(std::string()));
EXPECT_EQ(0, empty.Match(std::string()));
for (int i = MIN_CHAR; i < 128; ++i) {
auto str = std::string(1, char(i));
EXPECT_FALSE(empty.Matches(str));
EXPECT_EQ(-1, empty.Match(str));
}
}
TEST(RegExTest, Range) {
for (int i = MIN_CHAR; i < 128; ++i) {
for (int j = MIN_CHAR; j < 128; ++j) {
RegEx ex((char)i, (char)j);
for (int k = MIN_CHAR; k < 128; ++k) {
auto str = std::string(1, char(k));
if (i <= k && k <= j) {
EXPECT_TRUE(ex.Matches(str));
EXPECT_EQ(1, ex.Match(str));
} else {
EXPECT_FALSE(ex.Matches(str));
EXPECT_EQ(-1, ex.Match(str));
}
}
}
}
}
TEST(RegExTest, EmptyString) {
RegEx ex = RegEx(std::string());
EXPECT_TRUE(ex.Matches(std::string()));
EXPECT_EQ(0, ex.Match(std::string()));
// Matches anything, unlike RegEx()!
EXPECT_TRUE(ex.Matches(std::string("hello")));
EXPECT_EQ(0, ex.Match(std::string("hello")));
}
TEST(RegExTest, SingleCharacterString) {
for (int i = MIN_CHAR; i < 128; ++i) {
RegEx ex(std::string(1, (char)i));
for (int j = MIN_CHAR; j < 128; ++j) {
auto str = std::string(1, char(j));
if (j == i) {
EXPECT_TRUE(ex.Matches(str));
EXPECT_EQ(1, ex.Match(str));
// Match at start of string only!
std::string prefixed =
std::string(1, i + 1) + std::string("prefix: ") + str;
EXPECT_FALSE(ex.Matches(prefixed));
EXPECT_EQ(-1, ex.Match(prefixed));
} else {
EXPECT_FALSE(ex.Matches(str));
EXPECT_EQ(-1, ex.Match(str));
}
}
}
}
TEST(RegExTest, MultiCharacterString) {
RegEx ex(std::string("ab"));
EXPECT_FALSE(ex.Matches(std::string("a")));
EXPECT_EQ(-1, ex.Match(std::string("a")));
EXPECT_TRUE(ex.Matches(std::string("ab")));
EXPECT_EQ(2, ex.Match(std::string("ab")));
EXPECT_TRUE(ex.Matches(std::string("abba")));
EXPECT_EQ(2, ex.Match(std::string("abba")));
// match at start of string only!
EXPECT_FALSE(ex.Matches(std::string("baab")));
EXPECT_EQ(-1, ex.Match(std::string("baab")));
}
TEST(RegExTest, OperatorNot) {
RegEx ex = !RegEx(std::string("ab"));
EXPECT_TRUE(ex.Matches(std::string("a")));
EXPECT_EQ(1, ex.Match(std::string("a")));
EXPECT_FALSE(ex.Matches(std::string("ab")));
EXPECT_EQ(-1, ex.Match(std::string("ab")));
EXPECT_FALSE(ex.Matches(std::string("abba")));
EXPECT_EQ(-1, ex.Match(std::string("abba")));
// match at start of string only!
EXPECT_TRUE(ex.Matches(std::string("baab")));
// Operator not causes only one character to be matched.
EXPECT_EQ(1, ex.Match(std::string("baab")));
}
TEST(RegExTest, OperatorOr) {
for (int i = MIN_CHAR; i < 127; ++i) {
for (int j = i + 1; j < 128; ++j) {
auto iStr = std::string(1, char(i));
auto jStr = std::string(1, char(j));
RegEx ex1 = RegEx(iStr) | RegEx(jStr);
RegEx ex2 = RegEx(jStr) | RegEx(iStr);
for (int k = MIN_CHAR; k < 128; ++k) {
auto str = std::string(1, char(k));
if (i == k || j == k) {
EXPECT_TRUE(ex1.Matches(str));
EXPECT_TRUE(ex2.Matches(str));
EXPECT_EQ(1, ex1.Match(str));
EXPECT_EQ(1, ex2.Match(str));
} else {
EXPECT_FALSE(ex1.Matches(str));
EXPECT_FALSE(ex2.Matches(str));
EXPECT_EQ(-1, ex1.Match(str));
EXPECT_EQ(-1, ex2.Match(str));
}
}
}
}
}
TEST(RegExTest, OperatorOrShortCircuits) {
RegEx ex1 = RegEx(std::string("aaaa")) | RegEx(std::string("aa"));
RegEx ex2 = RegEx(std::string("aa")) | RegEx(std::string("aaaa"));
EXPECT_TRUE(ex1.Matches(std::string("aaaaa")));
EXPECT_EQ(4, ex1.Match(std::string("aaaaa")));
EXPECT_TRUE(ex2.Matches(std::string("aaaaa")));
EXPECT_EQ(2, ex2.Match(std::string("aaaaa")));
}
TEST(RegExTest, OperatorAnd) {
RegEx emptySet = RegEx('a') & RegEx();
EXPECT_FALSE(emptySet.Matches(std::string("a")));
}
TEST(RegExTest, OperatorAndShortCircuits) {
RegEx ex1 = RegEx(std::string("aaaa")) & RegEx(std::string("aa"));
RegEx ex2 = RegEx(std::string("aa")) & RegEx(std::string("aaaa"));
EXPECT_TRUE(ex1.Matches(std::string("aaaaa")));
EXPECT_EQ(4, ex1.Match(std::string("aaaaa")));
EXPECT_TRUE(ex2.Matches(std::string("aaaaa")));
EXPECT_EQ(2, ex2.Match(std::string("aaaaa")));
}
TEST(RegExTest, OperatorPlus) {
RegEx ex = RegEx(std::string("hello ")) + RegEx(std::string("there"));
EXPECT_TRUE(ex.Matches(std::string("hello there")));
EXPECT_FALSE(ex.Matches(std::string("hello ")));
EXPECT_FALSE(ex.Matches(std::string("there")));
EXPECT_EQ(11, ex.Match(std::string("hello there")));
}
TEST(RegExTest, StringOr) {
std::string str = "abcde";
RegEx ex = RegEx(str, YAML::REGEX_OR);
for (size_t i = 0; i < str.size(); ++i) {
EXPECT_TRUE(ex.Matches(str.substr(i, 1)));
EXPECT_EQ(1, ex.Match(str.substr(i, 1)));
}
EXPECT_EQ(1, ex.Match(str));
}
} // namespace
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