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lazily stringify expressions

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Mickey Rose 2017-01-09 13:23:10 +01:00 • committed by Martin Hořeňovský
parent 3b7511e564
commit a1e9b841ff
7 changed files with 223 additions and 110 deletions
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70
include/internal/catch_result_builder.hpp
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@ -41,22 +41,10 @@ namespace Catch {
m_data.resultType = result ? ResultWas::Ok : ResultWas::ExpressionFailed;
return *this;
}
ResultBuilder& ResultBuilder::setLhs( std::string const& lhs ) {
m_exprComponents.lhs = lhs;
return *this;
}
ResultBuilder& ResultBuilder::setRhs( std::string const& rhs ) {
m_exprComponents.rhs = rhs;
return *this;
}
ResultBuilder& ResultBuilder::setOp( std::string const& op ) {
m_exprComponents.op = op;
return *this;
}
void ResultBuilder::endExpression() {
m_exprComponents.testFalse = isFalseTest( m_assertionInfo.resultDisposition );
captureExpression();
void ResultBuilder::endExpression( DecomposedExpression const& expr ) {
AssertionResult result = build( expr );
handleResult( result );
}
void ResultBuilder::useActiveException( ResultDisposition::Flags resultDisposition ) {
@ -69,6 +57,7 @@ namespace Catch {
setResultType( resultType );
captureExpression();
}
void ResultBuilder::captureExpectedException( std::string const& expectedMessage ) {
if( expectedMessage.empty() )
captureExpectedException( Matchers::Impl::Generic::AllOf<std::string>() );
@ -78,7 +67,7 @@ namespace Catch {
void ResultBuilder::captureExpectedException( Matchers::Impl::Matcher<std::string> const& matcher ) {
assert( m_exprComponents.testFalse == false );
assert( !isFalseTest( m_assertionInfo.resultDisposition ) );
AssertionResultData data = m_data;
data.resultType = ResultWas::Ok;
data.reconstructedExpression = m_assertionInfo.capturedExpression;
@ -96,6 +85,7 @@ namespace Catch {
AssertionResult result = build();
handleResult( result );
}
void ResultBuilder::handleResult( AssertionResult const& result )
{
getResultCapture().assertionEnded( result );
@ -107,6 +97,7 @@ namespace Catch {
m_shouldThrow = true;
}
}
void ResultBuilder::react() {
if( m_shouldThrow )
throw Catch::TestFailureException();
@ -117,43 +108,32 @@ namespace Catch {
AssertionResult ResultBuilder::build() const
{
assert( m_data.resultType != ResultWas::Unknown );
return build( *this );
}
// CAVEAT: The returned AssertionResult stores a pointer to the argument expr,
// a temporary DecomposedExpression, which in turn holds references to
// operands, possibly temporary as well.
// It should immediately be passed to handleResult; if the expression
// needs to be reported, its string expansion must be composed before
// the temporaries are destroyed.
AssertionResult ResultBuilder::build( DecomposedExpression const& expr ) const
{
assert( m_data.resultType != ResultWas::Unknown );
AssertionResultData data = m_data;
// Flip bool results if testFalse is set
if( m_exprComponents.testFalse ) {
if( data.resultType == ResultWas::Ok )
data.resultType = ResultWas::ExpressionFailed;
else if( data.resultType == ResultWas::ExpressionFailed )
data.resultType = ResultWas::Ok;
// Flip bool results if FalseTest flag is set
if( isFalseTest( m_assertionInfo.resultDisposition ) ) {
data.negate( expr.isBinaryExpression() );
}
data.message = m_stream.oss.str();
data.reconstructedExpression = reconstructExpression();
if( m_exprComponents.testFalse ) {
if( m_exprComponents.op == "" )
data.reconstructedExpression = "!" + data.reconstructedExpression;
else
data.reconstructedExpression = "!(" + data.reconstructedExpression + ")";
}
data.decomposedExpression = &expr; // for lazy reconstruction
return AssertionResult( m_assertionInfo, data );
}
std::string ResultBuilder::reconstructExpression() const {
if( m_exprComponents.op == "" )
return m_exprComponents.lhs.empty() ? m_assertionInfo.capturedExpression : m_exprComponents.lhs;
else if( m_exprComponents.op == "matches" )
return m_exprComponents.lhs + " " + m_exprComponents.rhs;
else if( m_exprComponents.op != "!" ) {
if( m_exprComponents.lhs.size() + m_exprComponents.rhs.size() < 40 &&
m_exprComponents.lhs.find("\n") == std::string::npos &&
m_exprComponents.rhs.find("\n") == std::string::npos )
return m_exprComponents.lhs + " " + m_exprComponents.op + " " + m_exprComponents.rhs;
else
return m_exprComponents.lhs + "\n" + m_exprComponents.op + "\n" + m_exprComponents.rhs;
}
else
return "{can't expand - use " + m_assertionInfo.macroName + "_FALSE( " + m_assertionInfo.capturedExpression.substr(1) + " ) instead of " + m_assertionInfo.macroName + "( " + m_assertionInfo.capturedExpression + " ) for better diagnostics}";
void ResultBuilder::reconstructExpression( std::string& dest ) const {
dest = m_assertionInfo.capturedExpression;
}
} // end namespace Catch