acctest: Add a case where one of two entries is removed

Author: tabito-hara

internal/service/elbv2/listener_rule_test.go

@@ -2116,6 +2116,7 @@ func TestAccELBV2ListenerRule_transform(t *testing.T) {
 				Config: testAccListenerRuleConfig_transform(rName),
 				Check: resource.ComposeAggregateTestCheckFunc(
 					testAccCheckListenerRuleExists(ctx, resourceName, &conf),
+					resource.TestCheckResourceAttr(resourceName, "transform.#", "2"),
 					resource.TestCheckTypeSetElemNestedAttrs(resourceName, "transform.*", map[string]string{
 						names.AttrType:                                   string(awstypes.TransformTypeEnumHostHeaderRewrite),
 						"host_header_rewrite_config.#":                   "1",
@@ -2136,6 +2137,7 @@ func TestAccELBV2ListenerRule_transform(t *testing.T) {
 				Config: testAccListenerRuleConfig_transformUpdated(rName),
 				Check: resource.ComposeAggregateTestCheckFunc(
 					testAccCheckListenerRuleExists(ctx, resourceName, &conf),
+					resource.TestCheckResourceAttr(resourceName, "transform.#", "2"),
 					resource.TestCheckTypeSetElemNestedAttrs(resourceName, "transform.*", map[string]string{
 						names.AttrType:                                   string(awstypes.TransformTypeEnumHostHeaderRewrite),
 						"host_header_rewrite_config.#":                   "1",
@@ -2152,6 +2154,20 @@ func TestAccELBV2ListenerRule_transform(t *testing.T) {
 					}),
 				),
 			},
+			{
+				Config: testAccListenerRuleConfig_transformRemoveOneEntry(rName),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckListenerRuleExists(ctx, resourceName, &conf),
+					resource.TestCheckResourceAttr(resourceName, "transform.#", "1"),
+					resource.TestCheckTypeSetElemNestedAttrs(resourceName, "transform.*", map[string]string{
+						names.AttrType:                           string(awstypes.TransformTypeEnumUrlRewrite),
+						"url_rewrite_config.#":                   "1",
+						"url_rewrite_config.0.rewrite.#":         "1",
+						"url_rewrite_config.0.rewrite.0.regex":   "^/dp2/([A-Za-z0-9]+)/?$",
+						"url_rewrite_config.0.rewrite.0.replace": "/product.php?id=$1",
+					}),
+				),
+			},
 			{
 				// Remove all transforms
 				Config: testAccListenerRuleConfig_basic(rName),
@@ -4878,3 +4894,33 @@ resource "aws_lb_listener_rule" "test" {
 }
 `)
 }
+
+func testAccListenerRuleConfig_transformRemoveOneEntry(rName string) string {
+	return acctest.ConfigCompose(testAccListenerRuleConfig_baseWithHTTPListener(rName), `
+resource "aws_lb_listener_rule" "test" {
+  listener_arn = aws_lb_listener.test.arn
+  priority     = 100
+
+  action {
+    type             = "forward"
+    target_group_arn = aws_lb_target_group.test.arn
+  }
+
+  condition {
+    path_pattern {
+      values = ["/static/*"]
+    }
+  }
+
+  transform {
+    type = "url-rewrite"
+    url_rewrite_config {
+      rewrite {
+        regex   = "^/dp2/([A-Za-z0-9]+)/?$"
+        replace = "/product.php?id=$1"
+      }
+    }
+  }
+}
+`)
+}