[isoltest] Add support for fixed point types.

test/libsolidity/SemanticTest.cpp

@@ -461,6 +461,7 @@ TestCase::TestResult SemanticTest::runTest(
 		test.setSideEffects(move(effects));
 
 		success &= test.call().expectedSideEffects == test.call().actualSideEffects;
+		success &= test.checkFixedPointTypes();
 	}
 
 	if (!m_testCaseWantsYulRun && _isYulRun)

test/libsolidity/util/BytesUtils.cpp

@@ -96,6 +96,25 @@ bytes BytesUtils::convertNumber(string const& _literal)
 	}
 }
 
+bytes BytesUtils::convertFixedPoint(string const& _literal, size_t *_fixedPointN)
+{
+	solAssert(_fixedPointN != nullptr, "");
+	solAssert(_literal.find('.') != string::npos, "");
+	string v_integer{_literal};
+	string v_fraction;
+	v_integer = _literal.substr(0, _literal.find('.'));
+	v_fraction = {_literal.substr(_literal.find('.') + 1)};
+	try
+	{
+		*_fixedPointN = v_fraction.length();
+		return util::fromHex(util::toHex(u256{v_integer + v_fraction}));
+	}
+	catch (std::exception const&)
+	{
+		BOOST_THROW_EXCEPTION(TestParserError("Number encoding invalid."));
+	}
+}
+
 bytes BytesUtils::convertHexNumber(string const& _literal)
 {
 	try
@@ -206,6 +225,19 @@ string BytesUtils::formatString(bytes const& _bytes, size_t _cutOff)
 	return os.str();
 }
 
+std::string BytesUtils::formatFixedPoint(bytes const& _bytes, size_t _fixedPointM, size_t _fixedPointN)
+{
+	solAssert(_fixedPointM != 0, "");
+	u256 max{boost::multiprecision::pow(u256{2}, static_cast<unsigned>(_fixedPointM))};
+	solAssert(u256{_bytes} >= max, "");
+	stringstream os;
+	os << u256{_bytes};
+	string value{os.str()};
+	if (_fixedPointN > 0)
+		value.insert(value.length() - _fixedPointN, ".");
+	return value;
+}
+
 string BytesUtils::formatRawBytes(
 	bytes const& _bytes,
 	solidity::frontend::test::ParameterList const& _parameters,
@@ -296,6 +328,9 @@ string BytesUtils::formatBytes(
 	case ABIType::String:
 		os << formatString(_bytes, _bytes.size() - countRightPaddedZeros(_bytes));
 		break;
+	case ABIType::FixedPointType:
+		os << formatFixedPoint(_bytes, _abiType.M, _abiType.N);
+		break;
 	case ABIType::Failure:
 		break;
 	case ABIType::None:

test/libsolidity/util/BytesUtils.h

@@ -54,6 +54,10 @@ public:
 	/// representation of the decimal number literal. Throws if conversion fails.
 	static bytes convertNumber(std::string const& _literal);
 
+	/// Tries to convert \param _literal to an unpadded `bytes`
+	/// representation of the decimal number literal. Throws if conversion fails.
+	static bytes convertFixedPoint(std::string const& _literal, size_t *_fixedPointN);
+
 	/// Tries to convert \param _literal to an unpadded `bytes`
 	/// representation of the hex literal. Throws if conversion fails.
 	static bytes convertHexNumber(std::string const& _literal);
@@ -98,6 +102,11 @@ public:
 		return formatString(_bytes, _bytes.size());
 	}
 
+	/// Converts \param _bytes to a soltest-compliant and human-readable
+	/// string representation of a byte array which is assumed to hold
+	/// a hexString value.
+	static std::string formatFixedPoint(bytes const& _bytes, size_t _fixedPointM, size_t _fixedPointN);
+
 	/// Used to print returned bytes from function calls to the commandline.
 	/// Returns a string representation of given _bytes in ranges of 32 bytes.
 	/// If _withSignature is true, the first 4 bytes will be formatted separately.

test/libsolidity/util/ContractABIUtils.cpp

@@ -114,6 +114,11 @@ bool isFixedStringArray(string const& _type)
 	return regex_match(_type, regex{"string\\[\\d+\\]"});
 }
 
+bool isFixedPointType(string const& _type)
+{
+	return regex_match(_type, regex{"fixed.*"});
+}
+
 bool isTuple(string const& _type)
 {
 	return _type == "tuple";
@@ -245,6 +250,23 @@ bool ContractABIUtils::appendTypesFromName(
 			_dynamicTypes.push_back(ABIType{ABIType::String, ABIType::AlignLeft});
 		}
 	}
+	else if (isFixedPointType(type))
+	{
+		vector<string> fixedTypeParameter;
+		solAssert(boost::starts_with(type, "fixed"), "");
+		string fixedTypeParameterString{type.substr(5)};
+		solAssert(fixedTypeParameterString.find('x') != string::npos, "");
+		boost::split(fixedTypeParameter, fixedTypeParameterString, boost::is_any_of("x"));
+		solAssert(fixedTypeParameter.size() == 2, "");
+		ABIType abiType{ABIType::FixedPointType};
+		abiType.M = static_cast<unsigned>(std::stoi(fixedTypeParameter[0]));
+		abiType.N = static_cast<unsigned>(std::stoi(fixedTypeParameter[1]));
+		solAssert(
+			8 <= abiType.M && abiType.M <= 256 && abiType.M % 8 == 0 && abiType.N <= 80,
+			""
+		);
+		_inplaceTypes.push_back(abiType);
+	}
 	else if (isBytes(type))
 		return false;
 	else if (isFixedTupleArray(type))

test/libsolidity/util/SoltestTypes.h

@@ -107,7 +107,8 @@ struct ABIType
 		SignedDec,
 		Hex,
 		HexString,
-		String
+		String,
+		FixedPointType
 	};
 	enum Align
 	{
@@ -125,6 +126,8 @@ struct ABIType
 	Type type = ABIType::None;
 	Align align = ABIType::AlignRight;
 	size_t size = 32;
+	size_t M = 0;
+	size_t N = 0;
 	bool alignDeclared = false;
 };
 

test/libsolidity/util/TestFileParser.cpp

@@ -407,11 +407,18 @@ Parameter TestFileParser::parseParameter()
 		if (isSigned)
 			parsed = "-" + parsed;
 
+		if (parsed.find('.') == string::npos)
 			parameter.rawBytes = BytesUtils::applyAlign(
 				parameter.alignment,
 				parameter.abiType,
 				BytesUtils::convertNumber(parsed)
 			);
+		else
+		{
+			parameter.abiType.type = ABIType::FixedPointType;
+			// note that parameter.abiType.M & parameter.abiType.N are not set here.
+			parameter.rawBytes = BytesUtils::convertFixedPoint(parsed, &parameter.abiType.N);
+		}
 	}
 	else if (accept(Token::Failure, true))
 	{
@@ -667,7 +674,7 @@ string TestFileParser::Scanner::scanDecimalNumber()
 {
 	string number;
 	number += current();
-	while (langutil::isDecimalDigit(peek()))
+	while (langutil::isDecimalDigit(peek()) || '.' == peek())
 	{
 		advance();
 		number += current();

test/libsolidity/util/TestFunctionCall.cpp

@@ -18,8 +18,11 @@
 #include <test/libsolidity/util/ContractABIUtils.h>
 
 #include <libsolutil/AnsiColorized.h>
+#include <libsolutil/JSON.h>
 
+#include <boost/algorithm/string/classification.hpp>
 #include <boost/algorithm/string/replace.hpp>
+#include <boost/algorithm/string/split.hpp>
 
 #include <optional>
 #include <stdexcept>
@@ -266,6 +269,7 @@ string TestFunctionCall::formatBytesParameters(
 			if (preferredParams)
 			{
 				ContractABIUtils::overwriteParameters(_errorReporter, preferredParams.value(), abiParams.value());
+				preferredParams.value().begin()->abiType = abiParams.value().begin()->abiType;
 				os << BytesUtils::formatBytesRange(_bytes, preferredParams.value(), _highlight);
 			}
 		}
@@ -373,3 +377,66 @@ bool TestFunctionCall::matchesExpectation() const
 {
 	return m_failure == m_call.expectations.failure && m_rawBytes == m_call.expectations.rawBytes();
 }
+
+bool TestFunctionCall::checkFixedPointTypes()
+{
+	// if constructor, we do not have any type information, because of missing signature.
+	if (m_call.signature.find("constructor()") != string::npos)
+		return true;
+
+	// check fixed point type used in return type.
+	ErrorReporter errorReporter;
+	std::optional<ParameterList> returnType
+		= ContractABIUtils::parametersFromJsonOutputs(errorReporter, m_contractABI, m_call.signature);
+	if (returnType.has_value() && !returnType.value().empty() && returnType.value().begin()->abiType.type == ABIType::FixedPointType)
+		if (m_call.expectations.result.begin()->abiType.N != returnType.value().begin()->abiType.N)
+		{
+			// if not matching, we reset the raw bytes of result, so that isoltest will generate the correct expectation.
+			m_call.expectations.result.begin()->rawBytes = {};
+			return false;
+		}
+
+	// check fixed point types used in arguments.
+	// - extract argument types from signature
+	size_t ob = m_call.signature.find('(') + 1;
+	size_t cb = m_call.signature.find(')');
+	string signature = m_call.signature.substr(ob, cb - ob);
+	vector<string> inputTypes;
+	if (signature.find(',') != string::npos)
+	{
+		if (!signature.empty())
+			boost::split(inputTypes, signature, boost::is_any_of(","));
+	}
+	else if (!signature.empty())
+		inputTypes.emplace_back(signature);
+
+	if (m_call.arguments.parameters.size() != inputTypes.size())
+		return true;
+
+	// - iterate through arguments and check that fractional digits match with the corresponding argument type.
+	for (size_t i = 0; i < inputTypes.size(); ++i)
+	{
+		auto& type = inputTypes[i];
+		auto& parameter = m_call.arguments.parameters[i];
+		if ((parameter.abiType.type == ABIType::FixedPointType || parameter.abiType.type == ABIType::UnsignedDec) && (type.find("fixed") != string::npos))
+		{
+			size_t fixedPointN;
+			vector<string> fixedTypeParameter;
+			string fixedTypeParameterString{type.substr(5)};
+			solAssert(fixedTypeParameterString.find('x') != string::npos, "");
+			boost::split(fixedTypeParameter, fixedTypeParameterString, boost::is_any_of("x"));
+			solAssert(fixedTypeParameter.size() == 2, "");
+			fixedPointN = static_cast<unsigned>(std::stoi(fixedTypeParameter[1]));
+			string what;
+			if (parameter.rawString.find('.') != string::npos)
+			{
+				what = parameter.rawString.substr(parameter.rawString.find('.') + 1);
+				solAssert(fixedPointN == what.length(), type + " not compatible with '" + parameter.rawString + "'");
+			}
+			else
+				solAssert(fixedPointN == 0, type + " not compatible with '" + parameter.rawString + "'");
+		}
+	}
+
+	return true;
+}

test/libsolidity/util/TestFunctionCall.h

@@ -20,9 +20,11 @@
 #include <liblangutil/Exceptions.h>
 #include <libsolutil/AnsiColorized.h>
 #include <libsolutil/CommonData.h>
+#include <libsolutil/JSON.h>
 
 #include <json/json.h>
 
+#include "ContractABIUtils.h"
 #include <iosfwd>
 #include <numeric>
 #include <stdexcept>
@@ -95,6 +97,8 @@ public:
 	void setContractABI(Json::Value _contractABI) { m_contractABI = std::move(_contractABI); }
 	void setSideEffects(std::vector<std::string> _sideEffects) { m_call.actualSideEffects = _sideEffects; }
 
+	bool checkFixedPointTypes();
+
 private:
 	/// Tries to format the given `bytes`, applying the detected ABI types that have be set for each parameter.
 	/// Throws if there's a mismatch in the size of `bytes` and the desired formats that are specified
@@ -109,12 +113,6 @@ private:
 		bool failure = false
 	) const;
 
-	/// Formats a given _bytes applying the _abiType.
-	std::string formatBytesRange(
-		bytes const& _bytes,
-		ABIType const& _abiType
-	) const;
-
 	/// Formats a FAILURE plus additional parameters, if e.g. a revert message was returned.
 	std::string formatFailure(
 		ErrorReporter& _errorReporter,