tst_QtcProcess: Add a test that invokes a process recursively

After the required depth of recursion is met, the most
nested process waits for one seconds and crashes.

Change-Id: I8d9b359459fc7aa1983734685e5c5f19eb49ee94
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

tests/auto/utils/qtcprocess/processtestapp/processtestapp.cpp

@@ -206,3 +206,21 @@ int ProcessTestApp::CrashAfterOneSecond::main()
     doCrash();
     return 1;
 }
+
+int ProcessTestApp::RecursiveCrashingProcess::main()
+{
+    const int currentDepth = qEnvironmentVariableIntValue(envVar());
+    if (currentDepth == 0) {
+        QThread::sleep(1);
+        doCrash();
+        return 1;
+    }
+    SubProcessConfig subConfig(envVar(), QString::number(currentDepth - 1));
+    QtcProcess process;
+    subConfig.setupSubProcess(&process);
+    process.start();
+    process.waitForFinished();
+    if (process.exitStatus() == QProcess::NormalExit)
+        return process.exitCode();
+    return s_crashCode;
+}

tests/auto/utils/qtcprocess/processtestapp/processtestapp.h

@@ -70,6 +70,7 @@ public:
     SUB_PROCESS(KillBlockingProcess);
     SUB_PROCESS(EmitOneErrorOnCrash);
     SUB_PROCESS(CrashAfterOneSecond);
+    SUB_PROCESS(RecursiveCrashingProcess);
 
     // In order to get a value associated with the certain subprocess use SubProcessClass::envVar().
     // The classes above define different custom executables. Inside invokeSubProcess(), called
@@ -100,7 +101,7 @@ static const char s_simpleTestData[] = "Test process successfully executed.";
 static const char s_runBlockingStdOutSubProcessMagicWord[] = "42";
 
 // Expect ending lines detected at '|':
-const char s_lineCallbackData[] =
+static const char s_lineCallbackData[] =
        "This is the first line\r\n|"
        "Here comes the second one\r\n|"
        "And a line without LF\n|"
@@ -117,4 +118,6 @@ enum class BlockType {
     EventLoop
 };
 
+static const int s_crashCode = 123;
+
 Q_DECLARE_METATYPE(BlockType)

tests/auto/utils/qtcprocess/tst_qtcprocess.cpp

@@ -162,6 +162,7 @@ private slots:
     void flushFinishedWhileWaitingForReadyRead();
     void emitOneErrorOnCrash();
     void crashAfterOneSecond();
+    void recursiveCrashingProcess();
 
     void cleanupTestCase();
 
@@ -1206,6 +1207,20 @@ void tst_QtcProcess::crashAfterOneSecond()
     QCOMPARE(process.error(), QProcess::Crashed);
 }
 
+void tst_QtcProcess::recursiveCrashingProcess()
+{
+    const int recursionDepth = 5; // must be at least 1
+    SubProcessConfig subConfig(ProcessTestApp::RecursiveCrashingProcess::envVar(),
+                               QString::number(recursionDepth));
+    TestProcess process;
+    subConfig.setupSubProcess(&process);
+    process.start();
+    QVERIFY(process.waitForStarted(1000));
+    QVERIFY(process.waitForFinished(3000));
+    QCOMPARE(process.state(), QProcess::NotRunning);
+    QCOMPARE(process.exitStatus(), QProcess::NormalExit);
+    QCOMPARE(process.exitCode(), s_crashCode);
+}
 QTEST_MAIN(tst_QtcProcess)
 
 #include "tst_qtcprocess.moc"