chore: add a unit test for addArchiveSize (#1308)

* test: add a unit test for addArchiveSize

* Apply suggestions from code review

Co-authored-by: Eduardo Bouças <mail@eduardoboucas.com>

* test: remove join

* chore: rename tsc watch script

Co-authored-by: Eduardo Bouças <mail@eduardoboucas.com>

Co-authored-by: Eduardo Bouças <mail@eduardoboucas.com>

package.json

@@ -16,6 +16,7 @@
     "prepublishOnly": "npm ci && npm test",
     "prepack": "npm run build",
     "build": "tsc",
+    "build:dev": "tsc -w",
     "benchmark": "./benchmarks/run.sh",
     "format": "run-s build format:check-fix:*",
     "format:ci": "run-s build format:check:*",

tests/fixtures/archive-size/normal.js

@@ -0,0 +1,8 @@
+const handler = async (event, context) => {
+  return {
+    statusCode: 200,
+    body: `hello world!`,
+  };
+};
+
+export { handler };

tests/unit/utils/archive_size.test.ts

@@ -0,0 +1,29 @@
+import { resolve } from 'path'
+
+import { describe, expect, test } from 'vitest'
+
+import { FunctionArchive } from '../../../src/function.js'
+import { addArchiveSize } from '../../../src/utils/archive_size.js'
+import { FIXTURES_DIR } from '../../helpers/main.js'
+
+describe('addArchiveSize', () => {
+  test('adds the archive size of the file at `path` if it is a ZIP archive', async () => {
+    const functionArchive = {
+      path: resolve(FIXTURES_DIR, 'archive-size', 'normal.zip'),
+    } as FunctionArchive
+
+    const result = await addArchiveSize(functionArchive)
+
+    expect(result.size).toBe(1098)
+  })
+
+  test('does not add the archive size of the file at `path` if it is not a ZIP archive', async () => {
+    const functionArchive = {
+      path: resolve(FIXTURES_DIR, 'archive-size', 'normal.js'),
+    } as FunctionArchive
+
+    const result = await addArchiveSize(functionArchive)
+
+    expect(result.size).toBeUndefined()
+  })
+})