Added more unit tests and incorporated code review changes

Author: subyssurendran666

org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/Modifier.java

@@ -336,14 +336,14 @@ public String toString() {
 	 * Applicable only to types.
 	 * @since 3.24
 	 */
-	public static final int SEALED = 0x1000;
+	public static final int SEALED = 0x0200;
 
 	/**
 	 * "non-sealed" modifier constant (bit mask).
 	 * Applicable only to types.
 	 * @since 3.24
 	 */
-	public static final int NON_SEALED = 0x400;
+	public static final int NON_SEALED = 0x1000;
 
 	/**
 	 * "module" modifier constant (bit mask).
@@ -537,9 +537,6 @@ public static boolean isDefault(int flags) {
 	 * @since 3.24
 	 */
 	public static boolean isSealed(int flags) {
-		if(flags < -32768 || flags > 32767) {
-			return((flags >>> 16 ) & SEALED ) != 0;
-		}
 		return (flags & SEALED) != 0;
 	}
 
@@ -553,9 +550,6 @@ public static boolean isSealed(int flags) {
 	 * @since 3.24
 	 */
 	public static boolean isNonSealed(int flags) {
-		if(flags < -32768 || flags > 32767) {
-			return ((flags >>> 16 ) & NON_SEALED ) != 0;
-		}
 		return (flags & NON_SEALED) != 0;
 	}
 

org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/TypeBinding.java

@@ -45,7 +45,7 @@ class TypeBinding implements ITypeBinding {
 	protected static final IVariableBinding[] NO_VARIABLE_BINDINGS = new IVariableBinding[0];
 
 	private static final int VALID_MODIFIERS = Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE |
-		Modifier.ABSTRACT | Modifier.STATIC | Modifier.FINAL | Modifier.STRICTFP;
+		Modifier.ABSTRACT | Modifier.STATIC | Modifier.FINAL | Modifier.STRICTFP | Modifier.SEALED | Modifier.NON_SEALED;
 
 	org.eclipse.jdt.internal.compiler.lookup.TypeBinding binding;
 	private TypeBinding prototype = null;
@@ -589,12 +589,16 @@ public int getModifiers() {
 		if (isClass()) {
 			ReferenceBinding referenceBinding = (ReferenceBinding) this.binding;
 			final int accessFlags = referenceBinding.getAccessFlags() & VALID_MODIFIERS;
+
+			if (referenceBinding.isSealed()) {
+				return accessFlags | Modifier.SEALED;
+			}
+			if (referenceBinding.isNonSealed()) {
+				return accessFlags | Modifier.NON_SEALED;
+			}
 			if (referenceBinding.isAnonymousType()) {
 				return accessFlags & ~Modifier.FINAL;
 			}
-			if((referenceBinding.modifiers < -32768 || referenceBinding.modifiers > 32767) && (referenceBinding.isSealed() || referenceBinding.isNonSealed())) {//checks the modifiers has upper 16 bits
-				return referenceBinding.modifiers;
-			}
 			return accessFlags;
 		} else if (isAnnotation()) {
 			ReferenceBinding referenceBinding = (ReferenceBinding) this.binding;