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| <article class="doc"> |
| <h1 class="page">Testing Che-Theia plug-ins</h1> |
| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Developers can test how plug-ins work while working on them by running Che-Theia in the hosted mode. It is a special mode in which Che-Theia loads your plug-in directly from the <code>/projects</code> directory (as opposed to the rest of the plug-ins, which are loaded from the plug-in registry). The Che-Theia hosted mode is similar to the debug mode in VS Code.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_starting_a_hosted_che_theia_instance"><a class="anchor" href="#_starting_a_hosted_che_theia_instance"></a>Starting a hosted Che-Theia instance</h2> |
| <div class="sectionbody"> |
| <div class="olist arabic"> |
| <ol class="arabic"> |
| <li> |
| <p>Press F1 to display the command palette, and run the <code>Hosted Plugin: Start Instance</code> command.</p> |
| </li> |
| <li> |
| <p>Specify the path to the plug-in. A new browser tab is opened.</p> |
| </li> |
| </ol> |
| </div> |
| <div class="paragraph"> |
| <div class="title">Status in the hosted instance</div> |
| <p>When running in the hosted mode, Che-Theia displays a <strong>Development Host</strong> message in the status bar. When you hover your mouse over the message, a tip is displayed with the name of the hosted plug-in.</p> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="../_images/extensibility/che-theia-hosted-mode.png" alt="che theia hosted mode"> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <div class="title">Status in the main instance</div> |
| <p>At the same time, the main instance of Che-Theia displays a <strong>Hosted Plugin</strong> message in the status bar. This element indicates the state of the hosted instance. After starting the hosted instance, main Che-Theia begins to watch the code changes.</p> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="../_images/extensibility/watching-hosted-plug-in.png" alt="watching hosted plug in"> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>When you change something in your plug-in, you can switch to the hosted Che-Theia instance, refresh the page, and immediately see the results.</p> |
| </div> |
| <div class="paragraph"> |
| <div class="title">Plug-in output</div> |
| <p>When you run a hosted instance, the main Che-Theia instance opens the <strong>Output</strong> view. This view contains all the output from the <code>yarn</code> back-end process. It also contains the output of the back-end plug-in that is being developed.</p> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <a class="image" href="../_images/extensibility/hosted-instance-output.png"><img src="../_images/extensibility/hosted-instance-output.png" alt="hosted instance output"></a> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_controlling_a_hosted_che_theia_instance"><a class="anchor" href="#_controlling_a_hosted_che_theia_instance"></a>Controlling a hosted Che-Theia instance</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>You can control the state of the hosted instance directly from the main instance. Click <strong>Hosted Plugin</strong> element in the status bar, and a context menu with the available actions is displayed. You can stop and restart the running hosted Che-Theia instance from the context menu. When a hosted instance is stopped, use the context menu to start it again.</p> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="../_images/extensibility/controlling-hosted-che-theia.png" alt="controlling hosted che theia"> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_using_code_completion"><a class="anchor" href="#_using_code_completion"></a>Using code completion</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>There is a full code completion provided to help you write your plug-in. Code completion covers both the <code>Che Editor</code> plug-in API and the <code>Che Plugin</code> plug-in API.</p> |
| </div> |
| <div class="exampleblock"> |
| <div class="title">Example 1. Code-completion example</div> |
| <div class="content"> |
| <div class="paragraph"> |
| <p>Your plug-in will handle the opening of a document and displaying a notification message when the document is opened.</p> |
| </div> |
| <div class="paragraph"> |
| <p><span class="image"><a class="image" href="../_images/extensibility/code-completion-example.gif"><img src="../_images/extensibility/code-completion-example.gif" alt="code completion example"></a></span></p> |
| </div> |
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