Elements<> doesn't work properly when several threads work with same list

[vaskaska]

See example:

public class BaseTest {

    static int flag = 0;

    @BeforeMethod(alwaysRun = true)
    public void setUp() throws IOException {
        initFromProperties();
        init(useDriver("chrome"), YandexSite.class);
    }

    @Test
    public void testSample1() throws InterruptedException {
        YandexSite.yandexPage.open();
        YandexSite.yandexPage.searchField.input("av.by");
        System.out.println("First result for search [av.by]: " + YandexSite.yandexPage.autoSuggestItems.get(0).getText());
        flag = 1;
        while(flag == 1){Thread.sleep(1000);}
        System.out.println("First result for search [av.by]: " + YandexSite.yandexPage.autoSuggestItems.get(0).getText());
    }

    @Test
    public void testSample2() throws InterruptedException {
        YandexSite.yandexPage.open();
        YandexSite.yandexPage.searchField.input("cloud");
        while (flag == 0){Thread.sleep(1000);/*wait first thread init autosuggest items*/}
        System.out.println("First result for search [cloud]: " + YandexSite.yandexPage.autoSuggestItems.get(0).getText());
        flag = 0;
    }

    @AfterMethod(alwaysRun = true)
    public void tearDown(){
        WebSettings.getDriver().quit();
    }
}

@JSite("https://www.yandex.by/")
public class YandexSite extends WebSite {
    public static YandexPage yandexPage;
}

@JPage("")
public class YandexPage extends WebPage {
    @XPath("//input[contains(@class,'input__control')]")
    public TextField searchField;

    @XPath("//li[contains(@class,'suggest2-item')]")
    public Elements<Button> autoSuggestItems;

}

pom.xml

<dependencies>
        <!--JDI-->
        <dependency>
            <groupId>com.epam.jdi</groupId>
            <artifactId>jdi-uitest-web</artifactId>
            <version>1.1.18</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.0</version>
                <configuration>
                    <suiteXmlFiles>
                        <suiteXmlFile>src/test/resources/suite.xml</suiteXmlFile>
                    </suiteXmlFiles>
                    <reportsDirectory>${project.basedir}/test-output</reportsDirectory>
                </configuration>
            </plugin>
        </plugins>
    </build>

<suite name="test suite" parallel="tests" thread-count="10">

    <test name="Test1" preserve-order="true">
        <classes>
            <class name="example.BaseTest"/>
            <methods>
                <include name="testSample1" />
            </methods>
        </classes>
    </test>

    <test name="Test2" preserve-order="true">
        <classes>
            <class name="example.BaseTest"/>
            <methods>
                <include name="testSample2" />
            </methods>
        </classes>
    </test>

</suite>

run mvn clean install

Result output:

37:29.313 INFO: [ThreadID: 12]Input text 'av.by' in text field for TextField 'Search Field' (YandexPage.searchField; ; xpath='//input[contains(@Class,'input__control')]')
37:29.920 INFO: [ThreadID: 12]Get text for Button 'Button' (.Button; Has WebElement)
37:29.968 INFO: [ThreadID: 12]Get result 'av.by' in 0.05 seconds
First result for search [av.by]: av.by
37:33.606 INFO: [ThreadID: 13]Input text 'cloud' in text field for TextField 'Search Field' (YandexPage.searchField; ; xpath='//input[contains(@Class,'input__control')]')
37:33.714 INFO: [ThreadID: 13]Is element displayed for Button 'Button' (.Button; Has WebElement)
37:33.741 INFO: [ThreadID: 13]Get result 'true' in 0.03 seconds
37:33.750 INFO: [ThreadID: 13]Get text for Button 'Button' (.Button; Has WebElement)
37:33.772 INFO: [ThreadID: 13]Get result 'av.by' in 0.02 seconds
First result for search [cloud]: av.by
37:33.971 INFO: [ThreadID: 12]Is element displayed for Button 'Button' (.Button; Has WebElement)
37:33.997 INFO: [ThreadID: 12]Get result 'true' in 0.03 seconds
37:34.01 INFO: [ThreadID: 12]Get text for Button 'Button' (.Button; Has WebElement)
37:34.21 INFO: [ThreadID: 12]Get result 'av.by' in 0.02 seconds
First result for search [av.by]: av.by