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Forum Update on Monday, May 27th 2025

Qt Unit testing Error Please Help!!

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  • AmoghA Offline
    AmoghA Offline
    Amogh
    wrote on last edited by
    #1

    I was trying to execute the sample unit test for Gui Element !
    #include <QString>
    #include <QtTest>
    #include<QtWidgets>

    class Sample_Unit_Testing : public QObject
    {
    Q_OBJECT

    public:
    Sample_Unit_Testing();

    private Q_SLOTS:
    void tst_Gui();
    };
    void Sample_Unit_Testing::tst_Gui()
    {
    QLineEdit line_edit;
    QTest::keyClicks(&line_edit,"abcd");
    QCOMPARE(line_edit.text(),QString("abcd"));
    }

    this is my code, When i run this code i get an error which says

    QFATAL : Sample_Unit_Testing::tst_Gui() QWidget: Must construct a QApplication before a QWidget
    FAIL! : Sample_Unit_Testing::tst_Gui() Received a fatal error.

    Can anybody explain it me about the error and help??

    aha_1980A 1 Reply Last reply
    0
    • AmoghA Amogh

      I was trying to execute the sample unit test for Gui Element !
      #include <QString>
      #include <QtTest>
      #include<QtWidgets>

      class Sample_Unit_Testing : public QObject
      {
      Q_OBJECT

      public:
      Sample_Unit_Testing();

      private Q_SLOTS:
      void tst_Gui();
      };
      void Sample_Unit_Testing::tst_Gui()
      {
      QLineEdit line_edit;
      QTest::keyClicks(&line_edit,"abcd");
      QCOMPARE(line_edit.text(),QString("abcd"));
      }

      this is my code, When i run this code i get an error which says

      QFATAL : Sample_Unit_Testing::tst_Gui() QWidget: Must construct a QApplication before a QWidget
      FAIL! : Sample_Unit_Testing::tst_Gui() Received a fatal error.

      Can anybody explain it me about the error and help??

      aha_1980A Offline
      aha_1980A Offline
      aha_1980
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi @Amogh,

      do you use QTEST_MAIN? If not, please show your main function resp. use QTEST_MAIN.

      Regards

      Qt has to stay free or it will die.

      1 Reply Last reply
      2

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