Print Duplicate values in Dropdown List

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Permalink Reply by Dmitri T on August 7, 2019 at 3:38pm

If you're talking about HTML <select> tag

You can get all the optionsvalues into a List using //option XPath expression like:

List<String> allValues =
        driver.findElements(By.xpath("//option"))
                .stream()

                .map(option -> option.getAttribute("value"))

                .collect(Collectors.toList());





once done you can filter the all options values list and leave only duplicates using java.util.Stream API:

List<String> duplicateValues = allValues.stream().collect(Collectors.groupingBy(Function.identity()))
        .entrySet()
        .stream()

        .filter(e -> e.getValue().size() > 1)

        .map(Map.Entry::getKey)

        .collect(Collectors.toList());