process.cpp

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#include "process.h"
 
Process::Process() : m_expectFail(false), m_timedOut(false) {}
 
QString Process::execute(const QString &program, const QStringList &arguments,
                         bool expectedResult)
{
    Q_ASSERT(m_process.state() == QProcess::NotRunning);
    m_program = program;
    m_arguments = arguments;
    m_expectFail = expectedResult == ExpectFail;
    m_process.start(program, arguments);
    m_timedOut = !m_process.waitForFinished();
    return m_process.readAllStandardOutput();
}
 
bool Process::hasError()
{
    return m_timedOut
           || m_process.error() != QProcess::UnknownError
           || m_process.exitStatus() != QProcess::NormalExit
           || (m_process.exitCode() != 0) != m_expectFail;
}
 
QString Process::fmtErrorMessage()
{
    if (!hasError()) {
        return QString();
    }
 
    QStringList reasons;
    if (m_timedOut) {
        reasons.append("Timed out");
    } else if (m_process.exitStatus() != QProcess::NormalExit) {
        reasons.append("Process crashed");
    } else if (m_expectFail && (m_process.exitCode() == 0)) {
        reasons.append("Did not fail while it was expected to");
    } else {
        if (m_process.error() != QProcess::UnknownError) {
            reasons.append(m_process.errorString());
        }
        const QString errorOut = m_process.readAllStandardError();
        if (!errorOut.isEmpty()) {
            reasons.append(errorOut);
        }
    }
 
    return QString("Failed to execute `%1 %2`: %3")
           .arg(m_program)
           .arg(QStringList(m_arguments).replaceInStrings(QRegExp("^|$"), "\"").join(" "))
           .arg(reasons.join(": "));
}