Ts all the tests (#1998)

* Convert tests to TypeScript

* Add types for tests

* Rename files to TS

* Fix up test imports

* Fix TSC errors

* Liiiint

* Add types to util method signatures

* Some more types

src/common/entity/binary_sensor_icon.ts

@@ -0,0 +1,51 @@
+import { HassEntity } from "home-assistant-js-websocket";
+
+/** Return an icon representing a binary sensor state. */
+
+export default function binarySensorIcon(state: HassEntity) {
+  const activated = state.state && state.state === "off";
+  switch (state.attributes.device_class) {
+    case "battery":
+      return activated ? "hass:battery" : "hass:battery-outline";
+    case "cold":
+      return activated ? "hass:thermometer" : "hass:snowflake";
+    case "connectivity":
+      return activated ? "hass:server-network-off" : "hass:server-network";
+    case "door":
+      return activated ? "hass:door-closed" : "hass:door-open";
+    case "garage_door":
+      return activated ? "hass:garage" : "hass:garage-open";
+    case "gas":
+    case "power":
+    case "problem":
+    case "safety":
+    case "smoke":
+      return activated ? "hass:verified" : "hass:alert";
+    case "heat":
+      return activated ? "hass:thermometer" : "hass:fire";
+    case "light":
+      return activated ? "hass:brightness-5" : "hass:brightness-7";
+    case "lock":
+      return activated ? "hass:lock" : "hass:lock-open";
+    case "moisture":
+      return activated ? "hass:water-off" : "hass:water";
+    case "motion":
+      return activated ? "hass:walk" : "hass:run";
+    case "occupancy":
+      return activated ? "hass:home-outline" : "hass:home";
+    case "opening":
+      return activated ? "hass:square" : "hass:square-outline";
+    case "plug":
+      return activated ? "hass:power-plug-off" : "hass:power-plug";
+    case "presence":
+      return activated ? "hass:home-outline" : "hass:home";
+    case "sound":
+      return activated ? "hass:music-note-off" : "hass:music-note";
+    case "vibration":
+      return activated ? "hass:crop-portrait" : "hass:vibrate";
+    case "window":
+      return activated ? "hass:window-closed" : "hass:window-open";
+    default:
+      return activated ? "hass:radiobox-blank" : "hass:checkbox-marked-circle";
+  }
+}