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Fix stack trace of errors propagated by expect.withError #194

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Fix stack trace of errors propagated by expect.withError #194

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16 changes: 14 additions & 2 deletions lib/Unexpected.js
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Expand Up @@ -692,11 +692,23 @@ Unexpected.prototype.expect = function expect(subject, testDescriptionString) {
});
};
wrappedExpect.promise = makePromise;

wrappedExpect.withError = function (body, handler) {
return oathbreaker(makePromise(body).caught(function (e) {
var returnValue;
try {
returnValue = body();
} catch (e) {
throwIfNonUnexpectedError(e);
return handler(e);
}));
}
if (returnValue && typeof returnValue.then === 'function') {
return oathbreaker(returnValue.then(undefined, function (e) {
throwIfNonUnexpectedError(e);
return handler(e);
}));
} else {
return returnValue;
}
};

wrappedExpect.format = that.format;
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