Add some js tests, and update adsense js

test/javascripts/acceptance/adsense-test.js.es6

@@ -0,0 +1,56 @@
+import { acceptance, replaceCurrentUser } from "helpers/qunit-helpers";
+
+acceptance("AdSense", {
+  loggedIn: true,
+  settings: {
+    adsense_publisher_code: "MYADSENSEID",
+    adsense_through_trust_level: 2,
+    adsense_topic_list_top_code: "list_top_ad_unit",
+    adsense_topic_list_top_ad_sizes: "728*90 - leaderboard",
+    adsense_mobile_topic_list_top_code: "mobile_list_top_ad_unit",
+    adsense_mobile_topic_list_top_ad_size: "300*250 - medium rectangle",
+    adsense_post_bottom_code: "post_bottom_ad_unit",
+    adsense_post_bottom_ad_sizes: "728*90 - leaderboard",
+    adsense_mobile_post_bottom_code: "mobile_post_bottom_ad_unit",
+    adsense_mobile_post_bottom_ad_size: "300*250 - medium rectangle",
+    adsense_nth_post_code: 6
+  }
+});
+
+test("correct number of ads should show", async assert => {
+  replaceCurrentUser({ staff: false, trust_level: 1 });
+  await visit("/t/280"); // 20 posts
+  const ads = find(".google-adsense.adsense-post-bottom");
+  assert.equal(ads.length, 3, "it should render 3 ads");
+  assert.equal(
+    find("#post_6 + .widget-connector").find(
+      ".google-adsense.adsense-post-bottom"
+    ).length,
+    1,
+    "ad after 6th post"
+  );
+  assert.equal(
+    find("#post_12 + .widget-connector").find(
+      ".google-adsense.adsense-post-bottom"
+    ).length,
+    1,
+    "ad after 12th post"
+  );
+  assert.equal(
+    find("#post_18 + .widget-connector").find(
+      ".google-adsense.adsense-post-bottom"
+    ).length,
+    1,
+    "ad after 18th post"
+  );
+});
+
+test("no ads for trust level 3", async assert => {
+  replaceCurrentUser({ staff: false, trust_level: 3 });
+  await visit("/t/280");
+  assert.equal(
+    find(".google-adsense.adsense-post-bottom").length,
+    0,
+    "it should render 0 ads"
+  );
+});