Added junit to test building examples

Seems like some there is a bug in finding the examples as root folders
are marked as examples

Author: jantje

io.sloeber.core/src/jUnit/CreateAndCompileExamples.java

@@ -0,0 +1,134 @@
+package jUnit;
+
+import static org.junit.Assert.fail;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.Map;
+import java.util.TreeMap;
+
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.IncrementalProjectBuilder;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IPath;
+import org.eclipse.core.runtime.NullProgressMonitor;
+import org.eclipse.core.runtime.Path;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+import io.sloeber.core.api.BoardDescriptor;
+import io.sloeber.core.api.BoardsManager;
+import io.sloeber.core.api.CodeDescriptor;
+import io.sloeber.core.api.CompileOptions;
+import io.sloeber.core.api.ConfigurationDescriptor;
+
+@SuppressWarnings("nls")
+@RunWith(Parameterized.class)
+public class CreateAndCompileExamples {
+	private static int mCounter = 0;
+	private CodeDescriptor myCodeDescriptor;
+
+	public CreateAndCompileExamples(CodeDescriptor codeDescriptor) {
+		this.myCodeDescriptor = codeDescriptor;
+
+	}
+
+	@SuppressWarnings("rawtypes")
+	@Parameterized.Parameters
+	public static Collection examples() {
+		LinkedList<CodeDescriptor> examples = new LinkedList<>();
+		TreeMap<String, IPath> exampleFolders = BoardsManager.getAllExamples(null);
+		for (Map.Entry<String, IPath> curexample : exampleFolders.entrySet()) {
+			ArrayList<Path> paths = new ArrayList<>();
+
+			paths.add(new Path(curexample.getValue().toString()));
+			CodeDescriptor codeDescriptor = CodeDescriptor.createExample(false, paths);
+
+			examples.add(codeDescriptor);
+		}
+
+		return examples;
+
+	}
+
+	/*
+	 * In new new installations (of the Sloeber development environment) the
+	 * installer job will trigger downloads These mmust have finished before we
+	 * can start testing
+	 */
+	@BeforeClass
+	public static void WaitForInstallerToFinish() {
+		installAdditionalBoards();
+		Shared.waitForAllJobsToFinish();
+	}
+
+	public static void installAdditionalBoards() {
+		String[] packageUrlsToAdd = { "http://arduino.esp8266.com/stable/package_esp8266com_index.json" };
+		BoardsManager.addPackageURLs(new HashSet<>(Arrays.asList(packageUrlsToAdd)), true);
+		BoardsManager.installAllLatestPlatforms();
+
+	}
+
+	@Test
+	public void testUno() {
+
+		Map<String, String> myOptions = new HashMap<>();
+		String[] lines = new String("").split("\n"); //$NON-NLS-1$
+		for (String curLine : lines) {
+			String[] values = curLine.split("=", 2); //$NON-NLS-1$
+			if (values.length == 2) {
+				myOptions.put(values[0], values[1]);
+			}
+		}
+
+		BoardDescriptor boardid = BoardsManager.getBoardID("package_index.json", "arduino", "Arduino AVR Boards", "uno",
+				myOptions);
+		if (boardid == null) {
+			fail("Uno Board not found");
+			return;
+		}
+		BuildAndVerify(boardid, this.myCodeDescriptor);
+
+	}
+
+	public static void BuildAndVerify(BoardDescriptor boardid, CodeDescriptor codeDescriptor) {
+
+		IProject theTestProject = null;
+
+		NullProgressMonitor monitor = new NullProgressMonitor();
+		String projectName = String.format("%03d_", new Integer(mCounter++)) + boardid.getBoardID()
+				+ codeDescriptor.getExamples().get(0).lastSegment();
+		try {
+
+			theTestProject = boardid.createProject(projectName, null, ConfigurationDescriptor.getDefaultDescriptors(),
+					codeDescriptor, new CompileOptions(null), monitor);
+			Shared.waitForAllJobsToFinish(); // for the indexer
+		} catch (Exception e) {
+			e.printStackTrace();
+			fail("Failed to create the project:" + projectName);
+			return;
+		}
+		try {
+			theTestProject.build(IncrementalProjectBuilder.FULL_BUILD, monitor);
+			if (Shared.hasBuildErrors(theTestProject)) {
+				// try again because the libraries may not yet been added
+				Shared.waitForAllJobsToFinish(); // for the indexer
+				theTestProject.build(IncrementalProjectBuilder.FULL_BUILD, monitor);
+				if (Shared.hasBuildErrors(theTestProject)) {
+					// give up
+					fail("Failed to compile the project:" + projectName + " build errors");
+				}
+			}
+		} catch (CoreException e) {
+			e.printStackTrace();
+			fail("Failed to compile the project:" + projectName + " exception");
+		}
+	}
+
+}