fix: default to GithubLink when DemoSource is set to /src/test

Close #51

Author: javier-godoy

src/main/java/com/flowingcode/vaadin/addons/demo/TabbedDemo.java

@@ -183,11 +183,21 @@ public void showRouterLayoutContent(HasElement content) {
     String sourceCodeUrl = null;
     if (demoSource != null) {
       sourceCodeUrl = demoSource.value();
+
+      String demoFile;
       if (sourceCodeUrl.equals(DemoSource.GITHUB_SOURCE)) {
+        String className = demo.getClass().getName().replace('.', '/');
+        demoFile = "src/test/java/" + className + ".java";
+      } else if (sourceCodeUrl.startsWith("/src/test/")) {
+        demoFile = sourceCodeUrl.substring(1);
+      } else {
+        demoFile = null;
+      }
+
+      if (demoFile != null) {
         String branch = lookupGithubBranch(this.getClass());
-        String demoFile = demo.getClass().getName().replace('.', '/');
         sourceCodeUrl = Optional.ofNullable(this.getClass().getAnnotation(GithubLink.class))
-            .map(githubLink -> String.format("%s/blob/%s/src/test/java/%s.java", githubLink.value(),
+            .map(githubLink -> String.format("%s/blob/%s/%s", githubLink.value(),
                 branch, demoFile))
             .orElse(null);
       }

src/test/java/com/flowingcode/vaadin/addons/demo/AdHocDemo.java

@@ -0,0 +1,36 @@
+/*-
+ * #%L
+ * Commons Demo
+ * %%
+ * Copyright (C) 2020 - 2023 Flowing Code
+ * %%
+ * Licensed 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.
+ * #L%
+ */
+package com.flowingcode.vaadin.addons.demo;
+
+import com.vaadin.flow.component.html.Div;
+import com.vaadin.flow.component.html.Span;
+import com.vaadin.flow.router.PageTitle;
+import com.vaadin.flow.router.Route;
+
+@Route(value = "demo/demo-with-adhoc-source", layout = Demo.class)
+@PageTitle("Demo with source in a different file")
+@DemoSource("/src/test/java/com/flowingcode/vaadin/addons/demo/AdHocSource.java")
+public class AdHocDemo extends Div {
+
+  public AdHocDemo() {
+    add(new Span("This span is added to the demo view"));
+  }
+
+}

src/test/java/com/flowingcode/vaadin/addons/demo/AdHocSource.java

@@ -0,0 +1,12 @@
+package com.flowingcode.vaadin.addons.demo;
+
+import com.vaadin.flow.component.html.Div;
+import com.vaadin.flow.component.html.Span;
+
+public class AdHocSource extends Div {
+
+  public AdHocSource() {
+    add(new Span("... but sources have this other span instead"));
+  }
+
+}

src/test/java/com/flowingcode/vaadin/addons/demo/Demo.java

@@ -32,5 +32,6 @@ public Demo() {
     addDemo(new LegacyDemo());
     addDemo(SampleDemo.class, "Demo");
     addDemo(SampleDemoDefault.class);
+    addDemo(AdHocDemo.class);
   }
 }