feat(DataView, ConstDataView)

test/ConstDataView.test.js

@@ -0,0 +1,31 @@
+import { describe, expect, test } from "vitest";
+import { ConstDataView, parse, serialize, sizeofHead } from "../src";
+import { expectDataViewEqual, filledDataView } from ".";
+
+describe(ConstDataView.name, () => {
+  test('serialize', () => {
+    const expected = filledDataView([0x00, 0x00, 0x01, 0x02, 0x00, 0x00])
+    const dv = filledDataView([0x01, 0x02])
+
+    const buffer = new ArrayBuffer(6)
+    let actual = new DataView(buffer, 2, 1)
+    expect(() => serialize(actual, dv, ConstDataView(2))).toThrow()
+
+    actual = new DataView(buffer, 2, 2)
+
+    serialize(actual, dv, ConstDataView(2))
+    expectDataViewEqual(new DataView(actual.buffer), expected)
+  })
+
+  test('parse', () => {
+    const expected = filledDataView([0x01, 0x02])
+    const dv = filledDataView([0x00, 0x00, 0x01, 0x02, 0x00, 0x00])
+    const frame = new DataView(dv.buffer, dv.byteOffset + 2, 2)
+    const actual = parse(frame, ConstDataView(2))
+    expectDataViewEqual(actual, expected)
+  })
+
+  test('sizeof', () => {
+    expect(sizeofHead(ConstDataView(2))).toEqual(2)
+  })
+})