test(encodings.spec): add encoding tests and helper function

tests/encodings.spec.ts

@@ -0,0 +1,31 @@
+import {beforeAll, describe, expect, it} from 'vitest';
+
+import {parseTextFile} from "../src/file/file";
+import {readVcfFixture, readVcfFixtureAsBlob} from "./fixtures/fixtures";
+
+
+describe('parseDifferentEncodings', () => {
+
+  let expectedData: string;
+  beforeAll(() => {
+    expectedData = readVcfFixture('encoding-utf8.vcf');
+  })
+
+
+  it('should parse utf-8 vCards as it used to', async () => {
+    const data = await readVcfFixtureAsBlob('encoding-utf8.vcf');
+    const result = await parseTextFile(data)
+
+    expect(result).toBe(expectedData);
+
+  })
+
+  it('should parse windows-1251 vCards correctly', async () => {
+    const data = await readVcfFixtureAsBlob('encoding-win1251.vcf');
+    const result = await parseTextFile(data)
+
+    expect(result).toBe(expectedData);
+  })
+
+
+})

tests/fixtures/fixtures.ts

@@ -1,11 +1,17 @@
-import { readFileSync } from 'fs';
-import { join, resolve } from 'path';
+import {openAsBlob, readFileSync} from 'fs';
+import {join, resolve} from 'path';
 
 export function readVcfFixture(fileName: string): string {
   const filePath = join(__dirname, fileName);
   return readFileSync(filePath, 'utf8');
 }
 
+export async function readVcfFixtureAsBlob(fileName: string): Promise<Blob> {
+  const filePath = join(__dirname, fileName);
+  return openAsBlob(filePath);
+}
+
+
 export function readFrontmatterFixture(fileName: string): Record<string, any>|undefined {
   const fullPath = resolve(__dirname, fileName + '.js');
   // eslint-disable-next-line @typescript-eslint/no-var-requires