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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.annotation.Alerts;
19  import org.junit.jupiter.api.Test;
20  
21  /**
22   * Tests for {@link GainNode}.
23   *
24   * @author Ronald Brill
25   */
26  public class GainNodeTest extends WebDriverTestCase {
27  
28      /**
29       * @throws Exception if the test fails
30       */
31      @Test
32      @Alerts("true")
33      public void inWindow() throws Exception {
34          final String html = DOCTYPE_HTML
35              + "<html>\n"
36              + "<head>\n"
37              + "  <script>\n"
38              + LOG_TITLE_FUNCTION
39              + "    function test() {\n"
40              + "      log('GainNode' in window);\n"
41              + "    }\n"
42              + "  </script>\n"
43              + "</head>\n"
44              + "<body onload='test()'>\n"
45              + "</body>\n"
46              + "</html>";
47  
48          loadPageVerifyTitle2(html);
49      }
50  
51      /**
52       * @throws Exception if the test fails
53       */
54      @Test
55      @Alerts({"1", "-3.4028234663852886e+38", "3.4028234663852886e+38", "1", "0.5"})
56      public void ctor() throws Exception {
57          final String html = DOCTYPE_HTML
58              + "<html>\n"
59              + "<head>\n"
60              + "  <script>\n"
61              + LOG_TEXTAREA_FUNCTION
62  
63              + "    function test() {\n"
64              + "      if (!('AudioContext' in window)) {\n"
65              + "        log('AudioContext not available');\n"
66              + "        return;\n"
67              + "      }\n"
68  
69              + "      var audioCtx = new AudioContext();\n"
70              + "      var gainNode = new GainNode(audioCtx);\n"
71  
72              + "      log(gainNode.gain.defaultValue);\n"
73              + "      log(gainNode.gain.minValue);\n"
74              + "      log(gainNode.gain.maxValue);\n"
75              + "      log(gainNode.gain.value);\n"
76  
77              + "      gainNode.gain.value = 0.5;\n"
78              + "      log(gainNode.gain.value);\n"
79              + "    }\n"
80              + "  </script>\n"
81              + "</head>\n"
82              + "<body onload='test()'>\n"
83              + LOG_TEXTAREA
84              + "</body>\n"
85              + "</html>";
86  
87          loadPageVerifyTextArea2(html);
88      }
89  
90      /**
91       * @throws Exception if the test fails
92       */
93      @Test
94      @Alerts({"Error 1", "Error 2", "Error 3", "Error 4"})
95      public void ctorAudiocontextMissing() throws Exception {
96          final String html = DOCTYPE_HTML
97              + "<html>\n"
98              + "<head>\n"
99              + "  <script>\n"
100             + LOG_TEXTAREA_FUNCTION
101 
102             + "    function test() {\n"
103             + "      if (!('AudioContext' in window)) {\n"
104             + "        log('AudioContext not available');\n"
105             + "        return;\n"
106             + "      }\n"
107 
108             + "      var audioCtx = new AudioContext();\n"
109             + "      try {\n"
110             + "        gainNode = new GainNode();\n"
111             + "      } catch(e) { log('Error 1'); }\n"
112 
113             + "      try {\n"
114             + "        gainNode = new GainNode(undefined);\n"
115             + "      } catch(e) { log('Error 2'); }\n"
116 
117             + "      try {\n"
118             + "        gainNode = new GainNode(null);\n"
119             + "      } catch(e) { log('Error 3'); }\n"
120 
121             + "      try {\n"
122             + "        gainNode = new GainNode('wrong');\n"
123             + "      } catch(e) { log('Error 4'); }\n"
124 
125             + "    }\n"
126             + "  </script>\n"
127             + "</head>\n"
128             + "<body onload='test()'>\n"
129             + LOG_TEXTAREA
130             + "</body>\n"
131             + "</html>";
132 
133         loadPageVerifyTextArea2(html);
134     }
135 }