test: Add test that annotation on exception handler overwrites the annotation on the controller method if there is an exception

Fixes #150

Author: wimdeblauwe

htmx-spring-boot/src/test/java/io/github/wimdeblauwe/htmx/spring/boot/mvc/HtmxHandlerMethodTest.java

@@ -33,6 +33,15 @@ private static HttpHeaders htmxRequest() {
         return headers;
     }
 
+    @Test
+    public void testExceptionHandlerWithOverride() throws Exception {
+
+        mockMvc.perform(get("/throw-exception-annotation-override").headers(htmxRequest()))
+               .andExpect(status().isOk())
+               .andExpect(header().string("HX-Retarget", "#container"))
+               .andExpect(content().string("View1\n"));
+    }
+
     @Test
     public void testExceptionHandler() throws Exception {
 
@@ -253,6 +262,12 @@ public HtmxView handleError(TestExceptionForHtmxViewHandler ex, HtmxRequest htmx
             return new HtmxView("view1");
         }
 
+        @ExceptionHandler(TestExceptionForAnnotatedHandlerWithAnnotationOverride.class)
+        @HxRetarget("#container")
+        public String handleError(TestExceptionForAnnotatedHandlerWithAnnotationOverride ex, HtmxRequest htmxRequest, HtmxResponse htmxResponse) {
+            return "view1";
+        }
+
         @ExceptionHandler(TestExceptionForAnnotatedHandler.class)
         @HxRetarget("#container")
         public String handleError(TestExceptionForAnnotatedHandler ex, HtmxRequest htmxRequest, HtmxResponse htmxResponse) {
@@ -433,6 +448,13 @@ public void throwExceptionHtmxView() {
             throw new TestExceptionForHtmxViewHandler();
         }
 
+        @HxRequest
+        @GetMapping("/throw-exception-annotation-override")
+        @HxRetarget("controller-method-target")
+        public void throwExceptionAnnotationOverride() {
+            throw new TestExceptionForAnnotatedHandlerWithAnnotationOverride();
+        }
+
         @HxRequest
         @GetMapping("/throw-exception-annotated")
         public void throwExceptionForAnnotatedHandler() {
@@ -458,4 +480,9 @@ static class TestExceptionForAnnotatedHandler extends RuntimeException {
     static class TestExceptionForAnnotatedHandlerWithHtmxView extends RuntimeException {
 
     }
+
+    static class TestExceptionForAnnotatedHandlerWithAnnotationOverride extends RuntimeException {
+
+    }
+
 }