highlight incorrect throw statements

plugins/groovy/src/org/jetbrains/plugins/groovy/codeInspection/assignment/GroovyAssignabilityCheckInspection.java

@@ -46,6 +46,7 @@ import org.jetbrains.plugins.groovy.lang.psi.api.statements.arguments.GrNamedArg
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.blocks.GrClosableBlock;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.blocks.GrOpenBlock;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.branch.GrReturnStatement;
+import org.jetbrains.plugins.groovy.lang.psi.api.statements.branch.GrThrowStatement;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.*;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.literals.GrString;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.path.GrIndexProperty;
@@ -349,6 +350,16 @@ public class GroovyAssignabilityCheckInspection extends BaseInspection {
       }
     }
 
+    @Override
+    public void visitThrowStatement(GrThrowStatement throwStatement) {
+      super.visitThrowStatement(throwStatement);
+
+      final GrExpression exception = throwStatement.getException();
+      if (exception != null) {
+        checkAssignability(PsiType.getJavaLangThrowable(throwStatement.getManager(), throwStatement.getResolveScope()), exception, exception);
+      }
+    }
+
     private boolean checkLiteralConstructorApplicability(GroovyResolveResult result, GrListOrMap listOrMap, boolean checkUnknownArgs) {
       final PsiElement element = result.getElement();
       LOG.assertTrue(element instanceof PsiMethod && ((PsiMethod)element).isConstructor());

plugins/groovy/test/org/jetbrains/plugins/groovy/lang/GroovyHighlightingTest.groovy

@@ -867,7 +867,7 @@ C<error descr="Wrong number of type arguments: 2; required: 1"><String, Double><
   }
 
   public void testRawClosureReturnType() {
-    myFixture.configureByText('_.groovy', '''\
+    testHighlighting('''\
 class A<T> {
   A(T t) {this.t = t}
 
@@ -880,17 +880,17 @@ class A<T> {
 
 def a = new A(new Date())
 Date d = <warning descr="Cannot assign 'Object' to 'Date'">a.cl()</warning>
-''')
-    testHighlighting(GroovyUncheckedAssignmentOfMemberOfRawTypeInspection)
+''', GroovyUncheckedAssignmentOfMemberOfRawTypeInspection)
   }
 
-  private void testHighlighting(Class<? extends LocalInspectionTool>... inspections) {
+  private void testHighlighting(String text, Class<? extends LocalInspectionTool>... inspections) {
+    myFixture.configureByText('_.groovy', text)
     myFixture.enableInspections(inspections)
     myFixture.testHighlighting(true, false, true)
   }
 
   void testMethodRefs1() {
-    myFixture.configureByText('_.groovy', '''\
+    testHighlighting('''\
 class A {
   int foo(){2}
 
@@ -903,12 +903,11 @@ int i = foo()
 int i2 = <warning descr="Cannot assign 'Date' to 'int'">foo(2)</warning>
 Date d = foo(2)
 Date d2 = <warning descr="Cannot assign 'Integer' to 'Date'">foo()</warning>
-''')
-    testHighlighting(GroovyAssignabilityCheckInspection)
+''', GroovyAssignabilityCheckInspection)
   }
 
   void testMethodRefs2() {
-    myFixture.configureByText('_.groovy', '''\
+    testHighlighting('''\
 class Bar {
   def foo(int i, String s2) {s2}
   def foo(int i, int i2) {i2}
@@ -920,8 +919,21 @@ String s = cl("2")
 int s2 = <warning descr="Cannot assign 'String' to 'int'">cl("2")</warning>
 int i = cl(3)
 String i2 = cl(3)
-''')
-    testHighlighting(GroovyAssignabilityCheckInspection)
+''', GroovyAssignabilityCheckInspection)
   }
 
+  void testThrowObject() {
+    testHighlighting('''\
+def foo() {
+  throw new RuntimeException()
+}
+def bar () {
+  throw <warning descr="Cannot assign 'Object' to 'Throwable'">new Object()</warning>
+}
+
+def test() {
+  throw new Throwable()
+}
+''', GroovyAssignabilityCheckInspection)
+  }
 }