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Base.h
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Base.h
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#import <Foundation/Foundation.h>
#import <sstream>
#import "CedarStringifiers.h"
namespace Cedar { namespace Matchers {
struct BaseMessageBuilder {
template<typename U>
static NSString * string_for_actual_value(const U & value) {
return Stringifiers::string_for(value);
}
};
/**
* Basic functionality for all matchers. Meant to be used as a convenience base class for
* matcher classes.
*/
template<typename MessageBuilder_ = BaseMessageBuilder>
class Base {
private:
Base & operator=(const Base &);
public:
Base();
virtual ~Base() = 0;
// Allow default copy ctor.
template<typename U>
NSString * failure_message_for(const U &) const;
template<typename U>
NSString * negative_failure_message_for(const U &) const;
protected:
virtual NSString * failure_message_end() const = 0;
};
template<typename MessageBuilder_>
Base<MessageBuilder_>::Base() {}
template<typename MessageBuilder_>
Base<MessageBuilder_>::~Base() {}
template<typename MessageBuilder_> template<typename U>
NSString * Base<MessageBuilder_>::failure_message_for(const U & value) const {
NSString * failureMessageEnd = this->failure_message_end();
NSString * actualValueString = MessageBuilder_::string_for_actual_value(value);
return [NSString stringWithFormat:@"Expected <%@> to %@", actualValueString, failureMessageEnd];
}
template<typename MessageBuilder_> template<typename U>
NSString * Base<MessageBuilder_>::negative_failure_message_for(const U & value) const {
NSString * failureMessageEnd = this->failure_message_end();
NSString * actualValueString = MessageBuilder_::string_for_actual_value(value);
return [NSString stringWithFormat:@"Expected <%@> to not %@", actualValueString, failureMessageEnd];
}
}}