IDEA-239116 Switch expression without any results is not highlighted as erroneous

GitOrigin-RevId: 66580d3aa4a95e1fdb32b1a3131544560c9c432a

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/switchExpressions/SwitchExpressionHasResult.java

@@ -28,13 +28,13 @@ class C {
   }
 
   void defaultBranchAlwaysThrows(int n) {
-    String s = switch (n) {
+    String s = <error descr="Switch expression does not have any result expressions">switch</error> (n) {
       default: throw new RuntimeException();
     };
   }
 
   void defaultRuleAlwaysThrows(int n) {
-    String s = switch (n) {
+    String s = <error descr="Switch expression does not have any result expressions">switch</error> (n) {
       default -> throw new RuntimeException();
     };
   }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/switchExpressions/SwitchExpressionsNoResult.java

@@ -0,0 +1,18 @@
+class Test {
+  void test() {
+    int i = <error descr="Switch expression does not have any result expressions">switch</error>(0) {
+      default -> throw new NullPointerException();
+    };
+  }
+  
+  void test2() {
+    int i = <error descr="Switch expression does not have any result expressions">switch</error>(0) {
+      case 0 -> {while(true);}
+      case 1 -> {
+        throw new RuntimeException();
+      }
+      default -> throw new NullPointerException();
+    };
+    
+  }
+}