fix chord serialization

src/lib/serial/chord.spec.ts

@@ -1,8 +1,56 @@
 import {describe, it, expect} from "vitest"
-import {serializeActions} from "$lib/serial/chord"
+import {
+  chordAsCommandCompatible,
+  chordFromCommandCompatible,
+  chordsFromFile,
+  chordsToFile,
+  deserializeActions,
+  serializeActions,
+} from "./chord"
+import type {Chord} from "./chord"
 
 describe("chords", function () {
-  it("should serialize actions", function () {
-    expect(serializeActions([67, 2])).toBe(0xcc200000000000000000000000000n)
+  describe("actions", function () {
+    it("should serialize actions", function () {
+      expect(serializeActions([32, 51]).toString(16)).toEqual(0xcc200000000000000000000000000n.toString(16))
+    })
+
+    it("should deserialize actions", function () {
+      expect(deserializeActions(0xcc200000000000000000000000000n)).toEqual([32, 51])
+    })
+
+    for (let i = 0; i < 12; i++) {
+      it(`should serialize back-forth ${i} actions`, function () {
+        const actions = Array.from({length: i}).map((_, i) => i + 1)
+        expect(deserializeActions(serializeActions(actions))).toEqual(actions)
+      })
+    }
+  })
+
+  describe("commands", function () {
+    it("should convert to a command", function () {
+      expect(chordAsCommandCompatible({actions: [32, 51], phrase: [0x01, 0x68, 0x72, 0xd4, 0x65]})).toEqual(
+        "000CC200000000000000000000000000 016872D465",
+      )
+    })
+
+    it("should parse a command", function () {
+      expect(chordFromCommandCompatible("000CC200000000000000000000000000 016872D465")).toEqual({
+        actions: [32, 51],
+        phrase: [0x01, 0x68, 0x72, 0xd4, 0x65],
+      })
+    })
+  })
+
+  describe("chl file format", function () {
+    const fileData: Chord[] = [
+      {phrase: [1, 2, 3, 4], actions: [5, 6, 7, 8, 9]},
+      {phrase: [10, 11], actions: [12, 13, 14, 15]},
+      {phrase: [16], actions: [17]},
+    ]
+
+    it("should should convert back-forth a file", function () {
+      expect(chordsFromFile(chordsToFile(fileData))).toEqual(fileData)
+    })
   })
 })