Add clj, cljs and cljc tests

test/clj/widgetshop/example_test.clj

@@ -0,0 +1,5 @@
+(ns widgetshop.example-test
+  (:require [clojure.test :refer :all]))
+
+(deftest foobar
+  (is (= 1 1)))

test/cljs/widgetshop/app/products_test.cljs

@@ -0,0 +1,27 @@
+(ns widgetshop.app.products-test
+  (:require [cljs.test :as test :refer-macros [deftest is testing]]
+            [widgetshop.app.products :as p]))
+
+(deftest products-by-category
+  (testing "Value is set to the right path"
+    (is (= (p/products-by-category {} :foo [1 2 3])
+           {:products-by-category {:foo [1 2 3]}}))))
+
+(deftest setting-categories
+  (is (= (p/set-categories {:bar :baz} {:foo [] :baz []})
+         {:categories {:foo [] :baz []}
+          :bar :baz})))
+
+(deftest loading-products-by-category
+  (is (= (p/load-products-by-category!
+           {:categories [{:id 2 :name :foo}
+                         {:id 1 :name :bar}]}
+           (constantly "whatever doesn't matter")
+           1)
+         {:category {:id 1 :name :bar}
+          :categories [{:id 2 :name :foo}
+                       {:id 1 :name :bar}]
+          :products-by-category {{:id 1 :name :bar} :loading}})))
+
+
+

test/cljs/widgetshop/test_runner.cljs

@@ -0,0 +1,7 @@
+(ns widgetshop.test-runner
+  (:require [doo.runner :refer-macros [doo-tests]]
+            [widgetshop.app.products-test]))
+
+(enable-console-print!)
+
+(doo-tests 'widgetshop.app.products-test)