Testing highlight type for all "unused" diagnostics.

idea/testData/checker/Casts.kt

@@ -5,12 +5,12 @@ fun test() : Unit {
   x : Int?
   y : Int
   x as Int : Int
-  y <warning textAttributesKey="NOT_USED_ELEMENT_ATTRIBUTES">as Int</warning> : Int
+  y <warning>as Int</warning> : Int
-  x <warning textAttributesKey="NOT_USED_ELEMENT_ATTRIBUTES">as Int?</warning> : Int?
+  x <warning>as Int?</warning> : Int?
-  y <warning textAttributesKey="NOT_USED_ELEMENT_ATTRIBUTES">as Int?</warning> : Int?
+  y <warning>as Int?</warning> : Int?
   x as? Int : Int?
-  y <warning textAttributesKey="NOT_USED_ELEMENT_ATTRIBUTES">as? Int</warning> : Int?
+  y <warning>as? Int</warning> : Int?
-  x <warning textAttributesKey="NOT_USED_ELEMENT_ATTRIBUTES">as? Int?</warning> : Int?
+  x <warning>as? Int?</warning> : Int?
-  y <warning textAttributesKey="NOT_USED_ELEMENT_ATTRIBUTES">as? Int?</warning> : Int?
+  y <warning>as? Int?</warning> : Int?
   Unit
 }

idea/testData/checker/Unused.kt

@@ -0,0 +1,19 @@
+fun test(<warning textAttributesKey="NOT_USED_ELEMENT_ATTRIBUTES">unusedParam</warning>: Int) { // UNUSED_PARAMETER
+  val str = ":)"
+  str <warning textAttributesKey="NOT_USED_ELEMENT_ATTRIBUTES">as String</warning> // USELESS_CAST
+  str <warning textAttributesKey="NOT_USED_ELEMENT_ATTRIBUTES">as Any</warning>    // USELESS_CAST_STATIC_ASSERT_IS_FINE
+
+  // UNUSED_FUNCTION_LITERAL
+  <warning textAttributesKey="NOT_USED_ELEMENT_ATTRIBUTES">{
+    test(0)
+  }</warning>
+
+  val <warning textAttributesKey="NOT_USED_ELEMENT_ATTRIBUTES">unusedVar</warning> = ":(" // UNUSED_VARIABLE
+  var <warning textAttributesKey="NOT_USED_ELEMENT_ATTRIBUTES">neverAccessed</warning>: Int // ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE
+  neverAccessed = <warning>2</warning>
+
+  var redundantInitializer = <warning textAttributesKey="NOT_USED_ELEMENT_ATTRIBUTES">1</warning> // VARIABLE_WITH_REDUNDANT_INITIALIZER
+  redundantInitializer = 2
+  test(redundantInitializer)
+}
+

idea/tests/org/jetbrains/jet/checkers/JetPsiCheckerTestGenerated.java

@@ -339,6 +339,12 @@ public class JetPsiCheckerTestGenerated extends AbstractJetPsiCheckerTest {
             doTest(fileName);
         }
 
+        @TestMetadata("Unused.kt")
+        public void testUnused() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/checker/Unused.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("Variance.kt")
         public void testVariance() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/testData/checker/Variance.kt");