verify that help links work in the configuration page

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@15734 71c3de6d-444a-0410-be80-ed276b4c234a

test/src/test/java/hudson/model/HelpLinkTest.java

+package hudson.model;
+
+import org.jvnet.hudson.test.HudsonTestCase;
+import com.gargoylesoftware.htmlunit.html.HtmlPage;
+import com.gargoylesoftware.htmlunit.html.HtmlAnchor;
+
+import java.util.List;
+
+import hudson.tasks.Publisher;
+import hudson.tasks.BuildStepDescriptor;
+import hudson.tasks.Builder;
+import hudson.model.HelpLinkTest.HelpNotFoundBuilder.DescriptorImpl;
+
+/**
+ * Click all the help links and make sure they resolve to some text, not 404.
+ *
+ * @author Kohsuke Kawaguchi
+ */
+public class HelpLinkTest extends HudsonTestCase {
+    public void testSystemConfig() throws Exception {
+        clickAllHelpLinks(new WebClient().goTo("configure"));
+    }
+
+    public void testFreestyleConfig() throws Exception {
+        clickAllHelpLinks(createFreeStyleProject());
+    }
+
+    public void testMavenConfig() throws Exception {
+        clickAllHelpLinks(createMavenProject());
+    }
+
+    public void testMatrixConfig() throws Exception {
+        clickAllHelpLinks(createMatrixProject());
+    }
+
+    private void clickAllHelpLinks(Job j) throws Exception {
+        clickAllHelpLinks(new WebClient().getPage(j,"configure"));
+    }
+
+    private void clickAllHelpLinks(HtmlPage p) throws Exception {
+        List<?> helpLinks = p.selectNodes("//a[@class='help-button']");
+        assertTrue(helpLinks.size()>0);
+        System.out.println("Clicking "+helpLinks.size()+" help links");
+
+        for (HtmlAnchor helpLink : (List<HtmlAnchor>)helpLinks)
+            helpLink.click();
+    }
+
+    public static class HelpNotFoundBuilder extends Builder {
+        public static final class DescriptorImpl extends BuildStepDescriptor {
+            public boolean isApplicable(Class jobType) {
+                return true;
+            }
+
+            @Override
+            public String getHelpFile() {
+                return "no-such-file/exists";
+            }
+
+            public String getDisplayName() {
+                return "I don't have the help file";
+            }
+        }
+    }
+
+    /**
+     * Make sure that this test is meaningful.
+     * Intentionally put 404 and verify that it's detected.
+     */
+    public void testNegative() throws Exception {
+        DescriptorImpl d = new DescriptorImpl();
+        Publisher.all().add(d);
+        try {
+            clickAllHelpLinks(createFreeStyleProject());
+            fail("should detect a failure");
+        } catch(AssertionError e) {
+            if(e.getMessage().contains(d.getHelpFile()))
+                ; // expected
+            else
+                throw e;
+        } finally {
+            Publisher.all().remove(d);
+        }
+    }
+}