test: add test for pdu creating

Author: JulianWowra

tests/creating.test.ts

@@ -0,0 +1,30 @@
+import { describe, expect, test } from 'vitest';
+import { Submit } from '../src/index';
+
+describe('Test PDU creation', () => {
+	test('should correctly create a single-part Submit PDU message', () => {
+		const submit = new Submit('+1234567890', 'Hello, this is a simple Submit.');
+
+		const pduParts = submit.getPartStrings();
+		expect(pduParts).toHaveLength(1);
+
+		expect(pduParts[0]).toBe('0001000A91214365870900001FC8329BFD6681E8E8F41C949E83C2A079BA0D679741D3BAB89DA6BB00');
+	});
+
+	test('should correctly create a multi-part Submit PDU message', () => {
+		const submit = new Submit(
+			'+1234567890',
+			'Hello, this is a long text to reproduce the issue that Adam Smid has provided, I am trying to reproduce this with success. I hope you guys have a good day today, make every day count in your live!'
+		);
+
+		const pduParts = submit.getPartStrings();
+		expect(pduParts).toHaveLength(2);
+
+		expect(pduParts[0]).toBe(
+			'0041000A91214365870900008D06080403B60201C8329BFD6681E8E8F41C949E83C220F6DB7D06D1CB783A88FE06C9CB70F99B5C1F9741747419949ECFEB65101D1DA68382E4701B346DA7C92074780E82CBDFF634B94C668192A0701B4497E7D3EE3388FE06C9CB70F99B5C1F974174747A0EBAA7E968D0BC3E1E97E77317280942BFE16550FE5D07'
+		);
+		expect(pduParts[1]).toBe(
+			'0041000A91214365870900004706080403B60202A0733D3F07A1C3F632280C3ABFDF6410399C07D1DFE4709E056A87D76550D95E96E741E4701E347ED7DD7450DA0DCABFEB72103B6D2F8700'
+		);
+	});
+});