[FIX JENKINS-9598] Add plugin selection wizard on first launch

Also ... unbundling of plugins from Jenkins core.

core/src/test/java/hudson/ClassicPluginStrategyTest.java

@@ -0,0 +1,69 @@
+/*
+ * The MIT License
+ *
+ * Copyright (c) 2015, CloudBees, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package hudson;
+
+import hudson.util.VersionNumber;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.List;
+
+import static hudson.ClassicPluginStrategy.DetachedPlugin;
+
+/**
+ * @author <a href="mailto:tom.fennelly@gmail.com">tom.fennelly@gmail.com</a>
+ */
+public class ClassicPluginStrategyTest {
+
+    @Test
+    public void test_getDetachedPlugins() {
+        List<DetachedPlugin> list = ClassicPluginStrategy.getDetachedPlugins(new VersionNumber("1.296"));
+
+        Assert.assertTrue(list.size() >= 14); // There were 14 at the time of writing this test
+        Assert.assertNotNull(findPlugin("maven-plugin", list));
+        Assert.assertNotNull(findPlugin("subversion", list));
+
+        // Narrow the list to since "1.310" (the subversion detach version).
+        list = ClassicPluginStrategy.getDetachedPlugins(new VersionNumber("1.310"));
+        // Maven should no longer be in the list, but subversion should.
+        Assert.assertNull(findPlugin("maven-plugin", list));
+        Assert.assertNotNull(findPlugin("subversion", list));
+
+        // Narrow the list to since "1.311" (after the subversion detach version).
+        list = ClassicPluginStrategy.getDetachedPlugins(new VersionNumber("1.311"));
+        // Neither Maven or subversion should be in the list.
+        Assert.assertNull(findPlugin("maven-plugin", list));
+        Assert.assertNull(findPlugin("subversion", list));
+    }
+
+    private DetachedPlugin findPlugin(String shortName, List<DetachedPlugin> list) {
+        for (DetachedPlugin detachedPlugin : list) {
+            if (detachedPlugin.getShortName().equals(shortName)) {
+                return detachedPlugin;
+            }
+        }
+
+        return null;
+    }
+}