Add basic tests

lib/index.test.js

@@ -0,0 +1,28 @@
+const amazonScraper = require('amazon-buddy');
+
+test('asin', async () => {
+    const asin = await amazonScraper.asin({ asin: 'B01GW3H3U8' });
+    expect(asin);
+});
+
+test('categories', async () => {
+    const categories = await amazonScraper.categories();
+    expect(categories);
+});
+
+test('countries', async () => {
+    const countries = await amazonScraper.countries();
+    expect(countries.length).toBeGreaterThan(0);
+    const us = countries.find(({ country_code }) => country_code.toLowerCase() === 'us');
+    expect(us);
+});
+
+test('products', async () => {
+    const products = await amazonScraper.products({ keyword: 'Xbox One', number: 1 });
+    expect(Object.keys(products || {}).length).toBeGreaterThan(0);
+});
+
+test('reviews', async () => {
+    const reviews = await amazonScraper.reviews({ asin: 'B01GW3H3U8' });
+    expect(reviews);
+});