Started with async inputs to actions

app/imports/api/engine/action/functions/inputProviderForTests.testFn.ts

@@ -0,0 +1,34 @@
+import InputProvider from '/imports/api/engine/action/functions/InputProvider';
+
+const inputProviderForTests: InputProvider = {
+  /**
+   * For testing, randomness is hard to deal with
+   * rollDice function returns the average roll for every dice rolled
+   * [5d10, 1d4] => [[6,6,6,6,6], [3]]
+   */
+  async rollDice(action, dice) {
+    const result: number[][] = [];
+    for (const diceRoll of dice) {
+      const averageRoll = Math.round(diceRoll.diceSize / 2);
+      // Return an array full of averagely rolled dice
+      result.push(
+        new Array(diceRoll.number)
+          .fill(averageRoll)
+      )
+    }
+    return result;
+  },
+  /**
+   * For testing, always return the minimum number of choices, always choosing the first options
+   */
+  async choose(action, choices, quantity = [1, 1]) {
+    const chosen: string[] = [];
+    const choiceQuantity = quantity[0] <= 0 ? 1 : quantity[0];
+    for (let i = 0; i < choiceQuantity && i < choices.length; i += 1) {
+      chosen.push(choices[i]._id);
+    }
+    return chosen;
+  }
+}
+
+export default inputProviderForTests;