getLayers tests

test/index.test.js

@@ -0,0 +1,30 @@
+/* eslint-disable */ 
+const path = require('path');
+const fs = require('fs-extra');
+const fileProc = require('../index.js');
+
+const testGerber = path.join(__dirname, 'Arduino-Pro-Mini.zip');
+const testLayers = path.join(__dirname, 'layers');
+const emptyFolder = path.join(__dirname, 'layers', 'Empty');
+
+// getLayers
+test('Promise of an array of layers from a given folder', () => {
+  return fileProc.getLayers2(testLayers).then(data => {
+    expect(data).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          filename: expect.any(String),
+          gerber: expect.any(fs.ReadStream),
+        })
+      ])
+    );
+  });
+});
+
+test('Non-existent folder should reject promise with error', () => {
+  return expect(fileProc.getLayers2('./invalid_folder')).rejects.toThrow('Layers folder does not exist');
+});
+
+test('Folder with incorrect number of layers should reject promise with error', () => {
+  return expect(fileProc.getLayers2(emptyFolder)).rejects.toThrow('Layer not found');
+});