assertSame('Y|Z|AA|AB|AC', $res); } public function testColumnRangeErrorOnWrongFormat(): void{ $this->expectException(MalformattedRangeStringException::class); $columns = ConverterHelpers::RangeToColumnArray("-AC"); } public function testColumnRangeErrorOnTwoLetterColumnFirst(): void{ $this->expectException(MalformattedRangeStringException::class); $columns = ConverterHelpers::RangeToColumnArray("AC-Y"); } public function testColumnRangeErrorOnHigherColumnFirst(): void{ $this->expectException(MalformattedRangeStringException::class); $columns = ConverterHelpers::RangeToColumnArray("Z-B"); } }