Use new test utils in more test cases

demo/reagentdemo/intro.cljs

@@ -56,6 +56,8 @@
        [:p "Change it here: " [atom-input val]]])))
 
 (defn timer-component []
+  ;; FIXME: For some reason these timeouts trigger multiple
+  ;; renders and each render triggers a new timeout.
   (let [seconds-elapsed (r/atom 0)]
     (fn []
       (js/setTimeout #(swap! seconds-elapsed inc) 1000)

test/reagenttest/testreagent.cljs

@@ -3,7 +3,6 @@
             [clojure.test :as t :refer-macros [is deftest testing]]
             [goog.object :as gobj]
             [goog.string :as gstr]
-            [promesa.core :as p]
             [react :as react]
             [reagent.core :as r]
             [reagent.debug :as debug :refer [dev?]]
@@ -726,7 +725,6 @@
            (as-string [:div 1])))
     (is (= [1 1 1] [@n1 @n2 @n3]))))
 
-#_
 (u/deftest ^:dom lifecycle
   (let [n1 (atom 0)
         t (atom 0)
@@ -1046,7 +1044,6 @@
                        (.-componentStack ^js @info))))))))
 
 #_{:clj-kondo/ignore [:deprecated-var]}
-#_
 (u/deftest ^:dom test-dom-node
   (let [node (atom nil)
         ref (atom nil)
@@ -1072,6 +1069,7 @@
   (is (= "<p>#object[reagent.ratom.RAtom {:val 1}]</p>"
          (as-string [:p (r/atom 1)]))))
 
+;; FIXME: r/after-render won't work
 #_
 (u/deftest ^:dom test-after-render
   (let [spy (atom 0)
@@ -1164,7 +1162,6 @@
                          [:div "child," (gobj/get (.-context this) "foo")]))}))
 
 ;; Class component only
-#_
 (deftest ^:dom context-test
   (u/async
     (u/with-render [div [context-wrapper [context-child]]]
@@ -1270,7 +1267,6 @@
           (is (re-find #"Warning: Exception thrown while comparing argv's in shouldComponentUpdate:"
                        (first (:warn @reagent.debug/warnings)))))))))
 
-#_
 (u/deftest ^:dom get-derived-state-from-props-test
   (let [prop (r/atom 0)
         ;; Usually one can use Cljs object as React state. However,
@@ -1317,7 +1313,6 @@
         (u/act (swap! prop inc))
         (is (= "Error" (.-innerText div)))))))
 
-#_
 (u/deftest ^:dom get-snapshot-before-update-test
   (let [ref (react/createRef)
         prop (r/atom 0)
@@ -1344,7 +1339,6 @@
         (is (= {:height 20} @did-update))
         (.removeChild js/document.body div)))))
 
-#_
 (u/deftest ^:dom issue-462-test
   (let [val (r/atom 0)
         render (atom 0)
@@ -1389,7 +1383,6 @@
           (finally
             (r/set-default-compiler! nil)))))))
 
-#_
 (deftest ^:dom functional-component-poc-state-hook
   (let [;; Probably not the best idea to keep
         ;; refernce to state hook update fn, but
@@ -1435,7 +1428,6 @@
         (u/act (@set-count! 17))
         (is (= "Counts 6 17" (.-innerText div)))))))
 
-#_
 (u/deftest ^:dom test-input-el-ref
   (let [ref-1 (atom nil)
         ref-1-fn #(reset! ref-1 %)