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plasp/lib/tokenize/tests/TestTokenizer.cpp

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#include <catch.hpp>
#include <tokenize/Tokenizer.h>
#include <tokenize/TokenizerException.h>
////////////////////////////////////////////////////////////////////////////////////////////////////
TEST_CASE("[tokenizer] Simple strings are tokenized correctly", "[tokenizer]")
{
std::stringstream s(" identifier 5 \n-51\t 0 1 100 200 -300 -400");
tokenize::Tokenizer<> p("input", s);
REQUIRE(p.get<std::string>() == "identifier");
REQUIRE(p.get<size_t>() == 5);
REQUIRE(p.get<int>() == -51);
REQUIRE(p.get<bool>() == false);
REQUIRE(p.get<bool>() == true);
REQUIRE(p.get<int>() == 100);
REQUIRE(p.get<size_t>() == 200);
REQUIRE(p.get<int>() == -300);
REQUIRE_THROWS_AS(p.get<size_t>(), tokenize::TokenizerException);
}
////////////////////////////////////////////////////////////////////////////////////////////////////
TEST_CASE("[tokenizer] Tokenizing exceptions are correctly reported", "[tokenizer]")
{
std::stringstream s(" identifier 5 \n-51\t 0 1 100 200 -300 -400");
tokenize::Tokenizer<> p("input", s);
REQUIRE_NOTHROW(p.expect<std::string>("identifier"));
REQUIRE_NOTHROW(p.expect<size_t>(5));
REQUIRE_NOTHROW(p.expect<int>(-51));
REQUIRE_NOTHROW(p.expect<bool>(false));
REQUIRE_NOTHROW(p.expect<bool>(true));
REQUIRE_NOTHROW(p.expect<int>(100));
REQUIRE_NOTHROW(p.expect<size_t>(200));
REQUIRE_NOTHROW(p.expect<int>(-300));
REQUIRE_THROWS_AS(p.expect<size_t>(-400), tokenize::TokenizerException);
p.seek(0);
REQUIRE_THROWS_AS(p.expect<std::string>("error"), tokenize::TokenizerException);
p.seek(14);
REQUIRE_THROWS_AS(p.expect<size_t>(6), tokenize::TokenizerException);
p.seek(17);
REQUIRE_THROWS_AS(p.expect<int>(-50), tokenize::TokenizerException);
p.seek(24);
REQUIRE_THROWS_AS(p.expect<bool>(true), tokenize::TokenizerException);
p.seek(26);
REQUIRE_THROWS_AS(p.expect<bool>(false), tokenize::TokenizerException);
p.seek(28);
REQUIRE_THROWS_AS(p.expect<int>(101), tokenize::TokenizerException);
p.seek(31);
REQUIRE_THROWS_AS(p.expect<size_t>(201), tokenize::TokenizerException);
p.seek(34);
REQUIRE_THROWS_AS(p.expect<int>(-299), tokenize::TokenizerException);
}
////////////////////////////////////////////////////////////////////////////////////////////////////
TEST_CASE("[tokenizer] While tokenizing, the cursor position is as expected", "[tokenizer]")
{
std::stringstream s(" identifier 5 \n-51\t 0 1");
tokenize::Tokenizer<> p("input", s);
tokenize::StreamPosition pos;
pos = p.position();
REQUIRE(p.testAndReturn<std::string>("error") == false);
CHECK(p.position() == pos);
REQUIRE(p.testAndReturn<std::string>("identifier") == true);
CHECK(p.position() == pos);
REQUIRE(p.testAndSkip<std::string>("error") == false);
CHECK(p.position() == pos);
REQUIRE(p.testAndSkip<std::string>("identifier") == true);
CHECK(p.position() == 12);
pos = p.position();
REQUIRE(p.testAndReturn<size_t>(6) == false);
CHECK(p.position() == pos);
REQUIRE(p.testAndReturn<size_t>(5) == true);
CHECK(p.position() == pos);
REQUIRE(p.testAndSkip<size_t>(6) == false);
CHECK(p.position() == pos);
REQUIRE(p.testAndSkip<size_t>(5) == true);
CHECK(p.position() == 15);
pos = p.position();
REQUIRE(p.testAndReturn<int>(-50) == false);
CHECK(p.position() == pos);
REQUIRE(p.testAndReturn<int>(-51) == true);
CHECK(p.position() == pos);
REQUIRE(p.testAndSkip<int>(-50) == false);
CHECK(p.position() == pos);
REQUIRE(p.testAndSkip<int>(-51) == true);
CHECK(p.position() == 22);
pos = p.position();
REQUIRE(p.testAndReturn<bool>(true) == false);
CHECK(p.position() == pos);
REQUIRE(p.testAndReturn<bool>(false) == true);
CHECK(p.position() == pos);
REQUIRE(p.testAndSkip<bool>(true) == false);
CHECK(p.position() == pos);
REQUIRE(p.testAndSkip<bool>(false) == true);
CHECK(p.position() == 25);
pos = p.position();
REQUIRE(p.testAndReturn<bool>(false) == false);
CHECK(p.position() == pos);
REQUIRE(p.testAndReturn<bool>(true) == true);
CHECK(p.position() == pos);
REQUIRE(p.testAndSkip<bool>(false) == false);
CHECK(p.position() == pos);
REQUIRE(p.testAndSkip<bool>(true) == true);
CHECK(p.position() == 27);
}
////////////////////////////////////////////////////////////////////////////////////////////////////
TEST_CASE("[tokenizer] The end of the input stream is correctly handled", "[tokenizer]")
{
std::stringstream s1("test");
tokenize::Tokenizer<> p1("input", s1);
REQUIRE_NOTHROW(p1.expect<std::string>("test"));
REQUIRE_THROWS_AS(p1.get<std::string>(), tokenize::TokenizerException);
std::stringstream s2("test1 test2 test3");
tokenize::Tokenizer<> p2("input", s2);
REQUIRE_NOTHROW(p2.expect<std::string>("test1"));
REQUIRE_NOTHROW(p2.expect<std::string>("test2"));
REQUIRE_NOTHROW(p2.expect<std::string>("test3"));
REQUIRE_THROWS_AS(p2.get<std::string>(), tokenize::TokenizerException);
std::stringstream s3("-127");
tokenize::Tokenizer<> p3("input", s3);
p3.expect<int>(-127);
REQUIRE_THROWS_AS(p3.get<int>(), tokenize::TokenizerException);
std::stringstream s4("128 -1023 -4095");
tokenize::Tokenizer<> p4("input", s4);
REQUIRE_NOTHROW(p4.expect<size_t>(128));
REQUIRE_NOTHROW(p4.expect<int>(-1023));
REQUIRE_NOTHROW(p4.expect<int>(-4095));
REQUIRE_THROWS_AS(p4.get<int>(), tokenize::TokenizerException);
std::stringstream s5("0");
tokenize::Tokenizer<> p5("input", s5);
p5.expect<bool>(false);
REQUIRE_THROWS_AS(p5.get<bool>(), tokenize::TokenizerException);
std::stringstream s6("0 1 0");
tokenize::Tokenizer<> p6("input", s6);
REQUIRE_NOTHROW(p6.expect<bool>(false));
REQUIRE_NOTHROW(p6.expect<bool>(true));
REQUIRE_NOTHROW(p6.expect<bool>(false));
REQUIRE_THROWS_AS(p6.get<bool>(), tokenize::TokenizerException);
}
////////////////////////////////////////////////////////////////////////////////////////////////////
TEST_CASE("[tokenizer] While tokenizing, the cursor location is as expcected", "[tokenizer]")
{
std::stringstream s("123 \n4\ntest1\n test2\ntest3 \ntest4\n\n\n\n");
tokenize::Tokenizer<> p("input", s);
const auto startPosition = p.position();
tokenize::Location l;
l = p.location();
CHECK(l.rowStart == 1);
CHECK(l.columnStart == 1);
CHECK(p.currentCharacter() == '1');
p.advance();
l = p.location();
CHECK(l.rowStart == 1);
CHECK(l.columnStart == 2);
CHECK(p.currentCharacter() == '2');
p.advance();
l = p.location();
CHECK(l.rowStart == 1);
CHECK(l.columnStart == 3);
CHECK(p.currentCharacter() == '3');
p.advance();
l = p.location();
CHECK(l.rowStart == 1);
CHECK(l.columnStart == 4);
CHECK(p.currentCharacter() == ' ');
p.advance();
l = p.location();
CHECK(l.rowStart == 1);
CHECK(l.columnStart == 5);
CHECK(p.currentCharacter() == '\n');
p.advance();
l = p.location();
CHECK(l.rowStart == 2);
CHECK(l.columnStart == 1);
CHECK(p.currentCharacter() == '4');
p.advance();
REQUIRE_NOTHROW(p.expect<std::string>("test1"));
l = p.location();
CHECK(l.rowStart == 3);
CHECK(l.columnStart == 6);
REQUIRE_NOTHROW(p.expect<std::string>("test2"));
l = p.location();
CHECK(l.rowStart == 4);
CHECK(l.columnStart == 7);
REQUIRE_NOTHROW(p.expect<std::string>("test3"));
l = p.location();
CHECK(l.rowStart == 5);
CHECK(l.columnStart == 6);
REQUIRE_NOTHROW(p.skipLine());
l = p.location();
CHECK(l.rowStart == 6);
CHECK(l.columnStart == 1);
REQUIRE_NOTHROW(p.skipLine());
l = p.location();
CHECK(l.rowStart == 7);
CHECK(l.columnStart == 1);
REQUIRE_NOTHROW(p.skipWhiteSpace());
l = p.location();
CHECK(l.rowStart == 10);
CHECK(l.columnStart == 1);
CHECK(p.atEnd());
p.reset();
CHECK(p.position() == startPosition);
CHECK_FALSE(p.atEnd());
for (size_t i = 0; i < 5; i++)
p.advance();
CHECK(p.position() == static_cast<std::istream::pos_type>(5));
p.seek(static_cast<std::istream::pos_type>(7));
CHECK(p.position() == static_cast<std::istream::pos_type>(7));
REQUIRE_NOTHROW(p.expect<std::string>("test1"));
}
////////////////////////////////////////////////////////////////////////////////////////////////////
TEST_CASE("[tokenizer] While tokenizing with multiple sections, the cursor location is as expcected", "[tokenizer]")
{
std::stringstream s1("123 \n4\ntest1\n");
std::stringstream s2("456 \n7\ntest2\n");
tokenize::Tokenizer<> p;
p.read("test-1", s1);
p.read("test-2", s2);
const auto advance =
[&](auto steps)
{
for (auto i = 0; i < steps; i++)
p.advance();
};
tokenize::Location l;
l = p.location();
CHECK(l.sectionStart == "test-1");
CHECK(l.rowStart == 1);
CHECK(l.columnStart == 1);
CHECK(p.currentCharacter() == '1');
advance(1);
l = p.location();
CHECK(l.sectionStart == "test-1");
CHECK(l.rowStart == 1);
CHECK(l.columnStart == 2);
CHECK(p.currentCharacter() == '2');
advance(3);
l = p.location();
CHECK(l.sectionStart == "test-1");
CHECK(l.rowStart == 1);
CHECK(l.columnStart == 5);
CHECK(p.currentCharacter() == '\n');
advance(1);
l = p.location();
CHECK(l.sectionStart == "test-1");
CHECK(l.rowStart == 2);
CHECK(l.columnStart == 1);
CHECK(p.currentCharacter() == '4');
advance(1);
l = p.location();
CHECK(l.sectionStart == "test-1");
CHECK(l.rowStart == 2);
CHECK(l.columnStart == 2);
CHECK(p.currentCharacter() == '\n');
advance(1);
l = p.location();
CHECK(l.sectionStart == "test-1");
CHECK(l.rowStart == 3);
CHECK(l.columnStart == 1);
CHECK(p.currentCharacter() == 't');
advance(4);
l = p.location();
CHECK(l.sectionStart == "test-1");
CHECK(l.rowStart == 3);
CHECK(l.columnStart == 5);
CHECK(p.currentCharacter() == '1');
advance(1);
l = p.location();
CHECK(l.sectionStart == "test-1");
CHECK(l.rowStart == 3);
CHECK(l.columnStart == 6);
CHECK(p.currentCharacter() == '\n');
advance(1);
l = p.location();
CHECK(l.sectionStart == "test-2");
CHECK(l.rowStart == 1);
CHECK(l.columnStart == 1);
CHECK(p.currentCharacter() == '4');
advance(1);
l = p.location();
CHECK(l.sectionStart == "test-2");
CHECK(l.rowStart == 1);
CHECK(l.columnStart == 2);
CHECK(p.currentCharacter() == '5');
advance(3);
l = p.location();
CHECK(l.sectionStart == "test-2");
CHECK(l.rowStart == 1);
CHECK(l.columnStart == 5);
CHECK(p.currentCharacter() == '\n');
advance(1);
l = p.location();
CHECK(l.sectionStart == "test-2");
CHECK(l.rowStart == 2);
CHECK(l.columnStart == 1);
CHECK(p.currentCharacter() == '7');
advance(1);
l = p.location();
CHECK(l.sectionStart == "test-2");
CHECK(l.rowStart == 2);
CHECK(l.columnStart == 2);
CHECK(p.currentCharacter() == '\n');
advance(1);
l = p.location();
CHECK(l.sectionStart == "test-2");
CHECK(l.rowStart == 3);
CHECK(l.columnStart == 1);
CHECK(p.currentCharacter() == 't');
advance(4);
l = p.location();
CHECK(l.sectionStart == "test-2");
CHECK(l.rowStart == 3);
CHECK(l.columnStart == 5);
CHECK(p.currentCharacter() == '2');
advance(1);
l = p.location();
CHECK(l.sectionStart == "test-2");
CHECK(l.rowStart == 3);
CHECK(l.columnStart == 6);
CHECK(p.currentCharacter() == '\n');
advance(1);
CHECK(p.atEnd());
}
////////////////////////////////////////////////////////////////////////////////////////////////////
TEST_CASE("[tokenizer] Comments are correctly removed", "[tokenizer]")
{
std::stringstream s1("; comment at beginning\ntest1; comment in between\ntest2; comment at end");
tokenize::Tokenizer<> p1("input", s1);
p1.removeComments(";", "\n", false);
REQUIRE_NOTHROW(p1.expect<std::string>("test1"));
tokenize::Location l;
l = p1.location();
CHECK(l.rowStart == 2);
CHECK(l.columnStart == 6);
REQUIRE_NOTHROW(p1.expect<std::string>("test2"));
l = p1.location();
CHECK(l.rowStart == 3);
CHECK(l.columnStart == 6);
p1.skipWhiteSpace();
CHECK(p1.atEnd());
std::stringstream s2("test;");
tokenize::Tokenizer<> p2("input", s2);
p2.removeComments(";", "\n", false);
REQUIRE_NOTHROW(p2.expect<std::string>("test"));
p2.skipWhiteSpace();
CHECK(p2.atEnd());
std::stringstream s3("/* comment at start */ test1 /* comment in between */ test2 /*");
tokenize::Tokenizer<> p3("input", s3);
p3.removeComments("/*", "*/", true);
REQUIRE_NOTHROW(p3.expect<std::string>("test1"));
REQUIRE_NOTHROW(p3.expect<std::string>("test2"));
p3.skipWhiteSpace();
CHECK(p3.atEnd());
// Check that if there are no comments, the end is not accidentally truncated
std::stringstream s4("test foo bar");
tokenize::Tokenizer<> p4("input", s4);
p4.removeComments(";", "\n", false);
REQUIRE_NOTHROW(p4.expect<std::string>("test"));
REQUIRE_NOTHROW(p4.expect<std::string>("foo"));
REQUIRE_NOTHROW(p4.expect<std::string>("bar"));
CHECK(p4.atEnd());
}
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