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1   /*
2    * Copyright (c) 2002-2025 Gargoyle Software Inc.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * https://www.apache.org/licenses/LICENSE-2.0
8    *
9    * Unless required by applicable law or agreed to in writing, software
10   * distributed under the License is distributed on an "AS IS" BASIS,
11   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12   * See the License for the specific language governing permissions and
13   * limitations under the License.
14   */
15  package org.htmlunit.javascript.host.media;
16  
17  import org.htmlunit.WebDriverTestCase;
18  import org.htmlunit.junit.BrowserRunner;
19  import org.htmlunit.junit.annotation.Alerts;
20  import org.junit.Test;
21  import org.junit.runner.RunWith;
22  
23  /**
24   * Tests for {@link GainNode}.
25   *
26   * @author Ronald Brill
27   */
28  @RunWith(BrowserRunner.class)
29  public class GainNodeTest extends WebDriverTestCase {
30  
31      /**
32       * @throws Exception if the test fails
33       */
34      @Test
35      @Alerts("true")
36      public void inWindow() throws Exception {
37          final String html = DOCTYPE_HTML
38              + "<html>\n"
39              + "<head>\n"
40              + "  <script>\n"
41              + LOG_TITLE_FUNCTION
42              + "    function test() {\n"
43              + "      log('GainNode' in window);\n"
44              + "    }\n"
45              + "  </script>\n"
46              + "</head>\n"
47              + "<body onload='test()'>\n"
48              + "</body>\n"
49              + "</html>";
50  
51          loadPageVerifyTitle2(html);
52      }
53  
54      /**
55       * @throws Exception if the test fails
56       */
57      @Test
58      @Alerts({"1", "-3.4028234663852886e+38", "3.4028234663852886e+38", "1", "0.5"})
59      public void ctor() throws Exception {
60          final String html = DOCTYPE_HTML
61              + "<html>\n"
62              + "<head>\n"
63              + "  <script>\n"
64              + LOG_TEXTAREA_FUNCTION
65  
66              + "    function test() {\n"
67              + "      if (!('AudioContext' in window)) {\n"
68              + "        log('AudioContext not available');\n"
69              + "        return;\n"
70              + "      }\n"
71  
72              + "      var audioCtx = new AudioContext();\n"
73              + "      var gainNode = new GainNode(audioCtx);\n"
74  
75              + "      log(gainNode.gain.defaultValue);\n"
76              + "      log(gainNode.gain.minValue);\n"
77              + "      log(gainNode.gain.maxValue);\n"
78              + "      log(gainNode.gain.value);\n"
79  
80              + "      gainNode.gain.value = 0.5;\n"
81              + "      log(gainNode.gain.value);\n"
82              + "    }\n"
83              + "  </script>\n"
84              + "</head>\n"
85              + "<body onload='test()'>\n"
86              + LOG_TEXTAREA
87              + "</body>\n"
88              + "</html>";
89  
90          loadPageVerifyTextArea2(html);
91      }
92  
93      /**
94       * @throws Exception if the test fails
95       */
96      @Test
97      @Alerts({"Error 1", "Error 2", "Error 3", "Error 4"})
98      public void ctorAudiocontextMissing() throws Exception {
99          final String html = DOCTYPE_HTML
100             + "<html>\n"
101             + "<head>\n"
102             + "  <script>\n"
103             + LOG_TEXTAREA_FUNCTION
104 
105             + "    function test() {\n"
106             + "      if (!('AudioContext' in window)) {\n"
107             + "        log('AudioContext not available');\n"
108             + "        return;\n"
109             + "      }\n"
110 
111             + "      var audioCtx = new AudioContext();\n"
112             + "      try {\n"
113             + "        gainNode = new GainNode();\n"
114             + "      } catch(e) { log('Error 1'); }\n"
115 
116             + "      try {\n"
117             + "        gainNode = new GainNode(undefined);\n"
118             + "      } catch(e) { log('Error 2'); }\n"
119 
120             + "      try {\n"
121             + "        gainNode = new GainNode(null);\n"
122             + "      } catch(e) { log('Error 3'); }\n"
123 
124             + "      try {\n"
125             + "        gainNode = new GainNode('wrong');\n"
126             + "      } catch(e) { log('Error 4'); }\n"
127 
128             + "    }\n"
129             + "  </script>\n"
130             + "</head>\n"
131             + "<body onload='test()'>\n"
132             + LOG_TEXTAREA
133             + "</body>\n"
134             + "</html>";
135 
136         loadPageVerifyTextArea2(html);
137     }
138 }