我有一个表格，下面是我正在编写selenium测试的html行的描述：

<mat-row _ngcontent-kgo-c23="" class="mat-row ng-star-inserted" role="row">
    <!---->
        <mat-cell _ngcontent-kgo-c23="" class="mat-cell cdk-column-id mat-column-id ng-star-inserted" role="gridcell">
            <a _ngcontent-kgo-c23="" ng-reflect-router-link="/dir,208" href="/claim/208">208</a>
        </mat-cell>
        <mat-cell _ngcontent-kgo-c23="" class="mat-cell cdk-column-firstName mat-column-firstName ng-star-inserted" role="gridcell">
        George
        </mat-cell>
</mat-row>

以下是测试：

List<WebElement> idRows = super.wait(WAIT, INTERVAL).until(driver -> driver.findElements(By.className("mat-column-id")));
webDriver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
//Validate only one row exist in the search result
assertEquals(1,idRows.size());

//The result has is "208" and name "George"
WebElement firstNameInSearchResult = webDriver.findElement(By.className("cdk-column-firstName"));
System.out.println("===========>" + firstNameInSearchResult.gettext()+", " + idRows.get(0));
assertTrue(firstNameInSearchResult.getText().contains("George"));
assertTrue(idRows.get(0).getText().contains(searchId));

system.out.println显示空文本。print语句之后的Assert失败。我用正确的方法进行文本验证了吗？