add TypifiedElement.exists and HtmlElement.exists

htmlelements-java/src/main/java/ru/yandex/qatools/htmlelements/element/HtmlElement.java

@@ -2,6 +2,7 @@
 
 import org.openqa.selenium.By;
 import org.openqa.selenium.Dimension;
+import org.openqa.selenium.NoSuchElementException;
 import org.openqa.selenium.Point;
 import org.openqa.selenium.WebElement;
 import org.openqa.selenium.internal.WrapsElement;
@@ -83,6 +84,21 @@ public void setName(String name) {
         this.name = name;
     }
 
+    /**
+     * Determines whether or not this element exists on page.
+     *
+     * @return True if the element exists on page, false otherwise.
+     */
+    @SuppressWarnings("squid:S1166")  // Sonar "Exception handlers should preserve the original exception" rule
+    public boolean exists() {
+        try {
+            getWrappedElement().isDisplayed();
+        } catch (NoSuchElementException ignored) {
+            return false;
+        }
+        return true;
+    }
+
     /**
      * Clicks this element. See {@link org.openqa.selenium.WebElement#click()} for more details.
      */

htmlelements-java/src/main/java/ru/yandex/qatools/htmlelements/element/TypifiedElement.java

@@ -1,5 +1,6 @@
 package ru.yandex.qatools.htmlelements.element;
 
+import org.openqa.selenium.NoSuchElementException;
 import org.openqa.selenium.WebElement;
 import org.openqa.selenium.internal.WrapsElement;
 
@@ -84,6 +85,21 @@ public String toString() {
         return name;
     }
 
+    /**
+     * Determines whether or not this element exists on page.
+     *
+     * @return True if the element exists on page, false otherwise.
+     */
+    @SuppressWarnings("squid:S1166")  // Sonar "Exception handlers should preserve the original exception" rule
+    public boolean exists() {
+        try {
+            getWrappedElement().isDisplayed();
+        } catch (NoSuchElementException ignored) {
+            return false;
+        }
+        return true;
+    }
+
     /**
      * Is this element displayed or not? This method avoids the problem of having to parse an
      * element's "style" attribute.

htmlelements-java/src/test/java/ru/yandex/qatools/htmlelements/HtmlElementExistsMethodTest.java

@@ -0,0 +1,52 @@
+package ru.yandex.qatools.htmlelements;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.openqa.selenium.NoSuchElementException;
+import org.openqa.selenium.TimeoutException;
+import org.openqa.selenium.WebElement;
+import ru.yandex.qatools.htmlelements.element.HtmlElement;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * @author Alexander Kedrik [email protected]
+ *         Date: 07.09.15
+ */
+public class HtmlElementExistsMethodTest {
+    private final WebElement webElement = mock(WebElement.class);
+    private final HtmlElement htmlElement = new HtmlElement();
+
+    @Before
+    public void setUp() {
+        htmlElement.setWrappedElement(webElement);
+    }
+
+    @Test
+    public void existsShouldReturnTrueIfIsDisplayedReturnsTrue() {
+        when(webElement.isDisplayed()).thenReturn(true);
+        assertThat(htmlElement.exists(), is(true));
+    }
+
+    @Test
+    public void existsShouldReturnTrueIfIsDisplayedReturnsFalse() {
+        when(webElement.isDisplayed()).thenReturn(false);
+        assertThat(htmlElement.exists(), is(true));
+    }
+
+    @Test
+    public void existsShouldReturnFalseIfIsDisplayedThrowsNoSuchElementException() {
+        doThrow(new NoSuchElementException("")).when(webElement).isDisplayed();
+        assertThat(htmlElement.exists(), is(false));
+    }
+
+    @Test(expected = TimeoutException.class)
+    public void existsShouldCatchOnlyNoSuchElementException() {
+        doThrow(new TimeoutException("")).when(webElement).isDisplayed();
+        htmlElement.exists();
+    }
+}

htmlelements-java/src/test/java/ru/yandex/qatools/htmlelements/TypifiedElementExistsMethodTest.java

@@ -0,0 +1,46 @@
+package ru.yandex.qatools.htmlelements;
+
+import org.junit.Test;
+import org.openqa.selenium.NoSuchElementException;
+import org.openqa.selenium.TimeoutException;
+import org.openqa.selenium.WebElement;
+import ru.yandex.qatools.htmlelements.element.TypifiedElement;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * @author Alexander Kedrik [email protected]
+ *         Date: 07.09.15
+ */
+public class TypifiedElementExistsMethodTest {
+    private final WebElement webElement = mock(WebElement.class);
+    private final TypifiedElement typifiedElement = new TypifiedElement(webElement) {};
+
+    @Test
+    public void existsShouldReturnTrueIfIsDisplayedReturnsTrue() {
+        when(webElement.isDisplayed()).thenReturn(true);
+        assertThat(typifiedElement.exists(), is(true));
+    }
+
+    @Test
+    public void existsShouldReturnTrueIfIsDisplayedReturnsFalse() {
+        when(webElement.isDisplayed()).thenReturn(false);
+        assertThat(typifiedElement.exists(), is(true));
+    }
+
+    @Test
+    public void existsShouldReturnFalseIfIsDisplayedThrowsNoSuchElementException() {
+        doThrow(new NoSuchElementException("")).when(webElement).isDisplayed();
+        assertThat(typifiedElement.exists(), is(false));
+    }
+
+    @Test(expected = TimeoutException.class)
+    public void existsShouldCatchOnlyNoSuchElementException() {
+        doThrow(new TimeoutException("")).when(webElement).isDisplayed();
+        typifiedElement.exists();
+    }
+}