Bug 76792 organize imports: not correct: 0 import(s) added. [code manipulation]
Organize imports falsely sums up the total of added and removed imports to display a difference. 0 import(s) added. means that the total of added and removed imports is 0. It would be better if it told the user something like: 1 import(s) removed, 1 import(s) added. The status message is slightly more useful than you might think at first glance, as in the odd case that it does not work (which I can't reproduce) you want to notice this, and a useful status message helps.
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/core/ImportOrganizeTest.java
buf.append("public class ImportTest extends A implements IA, IB {\n");
		buf.append("  private B fB;\n");
		buf.append("  private Object fObj= new C();\n");
		buf.append("  public IB foo(IC c, ID d) throws IOException {\n");
		buf.append("   Object local= (D) fObj;\n");
		buf.append("   if (local instanceof E) {};\n");
		buf.append("   return null;\n");
		buf.append("  }\n");
		buf.append("}\n");
		
		pack= sourceFolder.createPackageFragment("other", false, null);
		ICompilationUnit cu= pack.getCompilationUnit("ImportTest.java");
		cu.createType(buf.toString(), null, false, null);
		String[] order= new String[0];
		IChooseImportQuery query= createQuery("ImportTest", new String[] {}, new int[] {});
	
		OrganizeImportsOperation op= new OrganizeImportsOperation(cu, order, 99, false, true, true, query);
		op.run(null);
		
		assertImports(cu, new String[] {
			"java.io.IOException",
			"test.A",
			"test.B",
			"test.C",
			"test.D",
			"test.E",			
			"test.IA",
			"test.IB",
			"test.IC",
			"test.ID",