code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC licenses this file
  // to you under the Apache License, Version 2.0 (the
  // "License"); you may not use this file except in compliance
  // with the License.  You may obtain a copy of the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing,
  // software distributed under the License is distributed on an
  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied.  See the License for the
  // specific language governing permissions and limitations
  // under the License.
  
  package org.openqa.selenium.html5;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.junit.jupiter.api.Assumptions.assumeTrue;
  
  import java.util.Set;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.openqa.selenium.testing.JupiterTestBase;
  
  class LocalStorageTest extends JupiterTestBase {
    @BeforeEach
    public void checkHasWebStorage() {
      assumeTrue(driver instanceof WebStorage);
      driver.get(pages.html5Page);
      LocalStorage local = ((WebStorage) driver).getLocalStorage();
      local.clear();
    }
  
    @Test
    void testLocalStorageSetAndGetItem() {
      driver.get(pages.html5Page);
  
      LocalStorage local = ((WebStorage) driver).getLocalStorage();
      local.clear();
      assertThat(local.size()).isZero();
  
      local.setItem("FOO", "BAR");
      assertThat(local.getItem("FOO")).isEqualTo("BAR");
  
      local.setItem("FOO1", "BAR1");
      assertThat(local.getItem("FOO1")).isEqualTo("BAR1");
      assertThat(local.size()).isEqualTo(2);
  
      local.clear();
      assertThat(local.size()).isZero();
    }
  
    @Test
    void testLocalStorageKeySet() {
      driver.get(pages.html5Page);
  
      LocalStorage local = ((WebStorage) driver).getLocalStorage();
      local.clear();
      local.setItem("FOO1", "BAR1");
      local.setItem("FOO2", "BAR2");
      local.setItem("FOO3", "BAR3");
  
      Set<String> keySet = local.keySet();
      assertThat(keySet.size()).isEqualTo(3);
      assertThat(keySet).contains("FOO1", "FOO2", "FOO3");
  
      local.clear();
      assertThat(local.keySet()).isEmpty();
    }
  
    @Test
    void testClearLocalStorage() {
      LocalStorage local = ((WebStorage) driver).getLocalStorage();
      local.setItem("FOO1", "BAR1");
      local.setItem("FOO2", "BAR2");
      local.setItem("FOO3", "BAR3");
      assertThat(local.size()).isEqualTo(3);
  
      local.clear();
      assertThat(local.size()).isZero();
    }
  
    @Test
    void testLocalStorageRemoveItem() {
      driver.get(pages.html5Page);
  
      LocalStorage local = ((WebStorage) driver).getLocalStorage();
      local.clear();
      local.setItem("FOO", "BAR");
      assertThat(local.size()).isEqualTo(1);
      String removedItemValue = local.removeItem("FOO");
      assertThat(removedItemValue).isEqualTo("BAR");
      assertThat(local.size()).isZero();
      local.clear();
    }
  
    @Test
    void testLocalAndSessionStorageDontInterfereWithEachOther() {
      driver.get(pages.html5Page);
  
      LocalStorage local = ((WebStorage) driver).getLocalStorage();
      SessionStorage session = ((WebStorage) driver).getSessionStorage();
      local.clear();
      session.clear();
      local.setItem("FOO", "BAR_LOCAL");
      session.setItem("FOO", "BAR_SESSION");
      assertThat(local.size()).isEqualTo(1);
      assertThat(session.size()).isEqualTo(1);
      assertThat(local.getItem("FOO")).isEqualTo("BAR_LOCAL");
      assertThat(session.getItem("FOO")).isEqualTo("BAR_SESSION");
      String removedItemValue = session.removeItem("FOO");
      assertThat(removedItemValue).isEqualTo("BAR_SESSION");
      assertThat(local.size()).isEqualTo(1);
      assertThat(session.size()).isZero();
      removedItemValue = local.removeItem("FOO");
      assertThat(removedItemValue).isEqualTo("BAR_LOCAL");
      assertThat(local.size()).isZero();
      assertThat(session.size()).isZero();
      local.clear();
      session.clear();
    }
  }
  