Method testFormulaCellInvalid

tests/backend/Column/ColumnTest.cpp:1502–1515

! * index in cell higher than rownumber */

 * index in cell higher than rownumber
 */
void ColumnTest::testFormulaCellInvalid() {
	auto c1 = Column(QStringLiteral("DataColumn"), Column::ColumnMode::Double);
	c1.replaceValues(-1, {1., 2., 3.});

	auto c2 = Column(QStringLiteral("FormulaColumn"), Column::ColumnMode::Double);
	c2.replaceValues(-1, {11., 12., 13., 14., 15., 16., 17.});

	c2.setFormula(QStringLiteral("cell(10,x)"), {QStringLiteral("x")}, QVector<Column*>({&c1}), true);
	c2.updateFormula();
	QCOMPARE(c2.rowCount(), 7);
	// All invalid
	for (int i = 0; i < c2.rowCount(); i++)
		VALUES_EQUAL(c2.valueAt(i), NAN);
}

void ColumnTest::testFormulaCellConstExpression() {
	auto c1 = Column(QStringLiteral("DataColumn"), Column::ColumnMode::Double);