added test case for incomplete Superclasses

sootup.tests/src/test/java/sootup/tests/typehierarchy/viewtypehierarchytestcase/IncompleteSuperclassTest.java

@@ -0,0 +1,31 @@
+package sootup.tests.typehierarchy.viewtypehierarchytestcase;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static sootup.core.util.ImmutableUtils.immutableList;
+
+import categories.Java8Test;
+import com.google.common.collect.ImmutableList;
+import java.util.List;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import sootup.core.typehierarchy.ViewTypeHierarchy;
+import sootup.core.types.ClassType;
+import sootup.tests.typehierarchy.JavaTypeHierarchyTestBase;
+
+/** @author Jonas Klauke * */
+@Category(Java8Test.class)
+public class IncompleteSuperclassTest extends JavaTypeHierarchyTestBase {
+  @Test
+  public void method() {
+    ViewTypeHierarchy typeHierarchy =
+        (ViewTypeHierarchy) customTestWatcher.getView().getTypeHierarchy();
+    List<ClassType> superclasses =
+        typeHierarchy.incompleteSuperClassesOf(getClassType("SubClassB"));
+    ClassType object = getClassType("java.lang.Object");
+    ImmutableList<ClassType> expectedSuperClasses =
+        immutableList(getClassType("SubClassA"), object);
+    assertEquals(expectedSuperClasses, superclasses);
+    assertFalse(customTestWatcher.getView().getClass(object).isPresent());
+  }
+}

sootup.tests/src/test/resources/javatypehierarchy/IncompleteSuperclass/SubClassA.java

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+public class SubClassA {
+
+}

sootup.tests/src/test/resources/javatypehierarchy/IncompleteSuperclass/SubClassB.java

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+public class SubClassB extends SubClassA {
+
+}