/**

 * @bug 261722: [search] NPE after removing a project

 * @test Ensure that no NPE occurs when project is deleted before the end of the search request

 * @see "https://bugs.eclipse.org/bugs/show_bug.cgi?id=261722"

 */

public void testBug261722() throws Exception {

	IPath projectPath = null;

	IJavaProject javaProject = null;

	try {

		// Create jar and project

		final int MAX = 10;

		final String[] pathsAndContents = new String[(1+MAX)*2];

		pathsAndContents[0] = "p261722/X.java";

		pathsAndContents[1] = "package p261722;\n" +

        	"public class X {}";

		for (int i=1; i<=MAX; i++) {

			String className = (i<10) ? "X0"+i : "X"+i;

			pathsAndContents[i*2] = "p261722/"+className+".java";

			pathsAndContents[i*2+1] = "package p261722;\n" +

	        	"public class "+className+" extends X {}";

        }

		javaProject = createJavaProject("P");

		projectPath = javaProject.getProject().getLocation();

		addLibrary(javaProject, "lib261722.jar", "lib261722.zip", pathsAndContents, "1.4");

		waitUntilIndexesReady();

		// Search in separated thread

		class TestSearchRequestor extends SearchRequestor {

			int count = 0;

			public void acceptSearchMatch(SearchMatch searchMatch) throws CoreException {

			    try {

	                Thread.sleep(100);

                } catch (InterruptedException e) {

	                // skip

                }

                this.count++;

		    }

		}

		final TestSearchRequestor requestor = new TestSearchRequestor();

		final SearchPattern pattern = SearchPattern.createPattern("X*", IJavaSearchConstants.DECLARATIONS, IJavaSearchConstants.TYPE, SearchPattern.R_PATTERN_MATCH);

		final IJavaSearchScope scope = SearchEngine.createJavaSearchScope(new IJavaElement[] { javaProject });

		Runnable search = new Runnable() {

			public void run() {

				try {

					new SearchEngine().search(pattern, new SearchParticipant[] { SearchEngine.getDefaultSearchParticipant() }, scope, requestor, null);

				} catch (CoreException e) {

					throw new RuntimeException(e);

				}

		    }

		};

		Thread thread = new Thread(search);

		thread.start();

		// Delete project in current thread

		while (requestor.count < (MAX/3)) {

			Thread.sleep(10);

		}

		deleteProject(javaProject);

		// Wait until search is finished

		while (thread.isAlive()) {

			Thread.sleep(100);

		}

		// Verify search results

		assertEquals("Unexpected matches count", MAX+1, requestor.count);

	} finally {

		if (projectPath != null) {

			deleteFile("/P/lib261722.jar");

			deleteFile("/P/lib261722.zip");

		}

	}

}