add tests for data migration

Author: matthijsgroen

src/support/migrateLevelState.spec.ts

@@ -0,0 +1,55 @@
+import { describe, expect, it } from "vitest";
+
+import {
+  createBlocks,
+  createLevelState,
+  createPlacementColumn
+} from "@/game/factories";
+
+import { migrateLevelState } from "./migrateLevelState";
+
+describe(migrateLevelState, () => {
+  it("returns the same value if it is already up to date", () => {
+    const value = createLevelState([
+      createPlacementColumn(4, createBlocks("red", "green", "blue"))
+    ]);
+    expect(migrateLevelState(value)).toEqual(value);
+  });
+
+  it("returns the an up to date version if version 1 is passed in", () => {
+    const value = {
+      colors: ["blue", "green", "red"],
+      columns: [
+        {
+          type: "placement",
+          locked: false,
+          columnSize: 4,
+          blocks: [
+            { color: "red", revealed: true },
+            { color: "green", revealed: true },
+            { color: "blue", revealed: true }
+          ]
+        }
+      ],
+      moves: []
+    } as unknown;
+
+    const expectedResult = {
+      blockTypes: ["blue", "green", "red"],
+      columns: [
+        {
+          type: "placement",
+          locked: false,
+          columnSize: 4,
+          blocks: [
+            { blockType: "red", revealed: true },
+            { blockType: "green", revealed: true },
+            { blockType: "blue", revealed: true }
+          ]
+        }
+      ],
+      moves: []
+    } as unknown;
+    expect(migrateLevelState(value)).toEqual(expectedResult);
+  });
+});

src/support/migrateLevelState.ts

@@ -2,10 +2,10 @@ import type { LevelState } from "@/game/types";
 
 import { isVersion1, migrateFromVersion1 } from "./migration/levelV1";
 
-export const migrateLevelState = (value: LevelState): LevelState => {
+export const migrateLevelState = (value: unknown): LevelState => {
   if (isVersion1(value)) {
     return migrateFromVersion1(value);
   }
 
-  return value;
+  return value as LevelState;
 };