Release Healer Man 0.1.16

server/arena-stages.test.mjs

@@ -0,0 +1,24 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import { ARENA_STAGES, VALIDATED_ARENA_STAGES, chooseArenaStage } from "./arena-stages.mjs";
+
+test("the rated pool contains all eight validated arenas", () => {
+  assert.equal(ARENA_STAGES.length, 8);
+  assert.deepEqual(VALIDATED_ARENA_STAGES.map((stage) => stage.id), ARENA_STAGES.map((stage) => stage.id));
+});
+
+test("rated selection covers the pool uniformly and avoids the previous arena", () => {
+  const choices = VALIDATED_ARENA_STAGES.map((_, index, pool) => (
+    chooseArenaStage({ random: () => (index + 0.25) / pool.length })
+  ));
+  assert.deepEqual(choices.map((stage) => stage.id), VALIDATED_ARENA_STAGES.map((stage) => stage.id));
+
+  const previousStageId = VALIDATED_ARENA_STAGES[0].id;
+  for (let index = 0; index < VALIDATED_ARENA_STAGES.length - 1; index += 1) {
+    const selected = chooseArenaStage({
+      previousStageId,
+      random: () => (index + 0.25) / (VALIDATED_ARENA_STAGES.length - 1),
+    });
+    assert.notEqual(selected.id, previousStageId);
+  }
+});