test: Added specific test for screenshots

Author: TriPSs

src/__tests__/page.spec.ts

@@ -11,7 +11,7 @@ describe('Page', () => {
 
   axiosMock.onAny().reply(200, Buffer.from(''))
 
-  test('it encode the page.html option', async () => {
+  test('it encode the page.html option (pdf)', async () => {
     await client.pdf.direct({
       page: {
         html: '<div>Your first Doczilla PDF</div>'
@@ -26,4 +26,19 @@ describe('Page', () => {
     }))
   })
 
+  test('it encode the page.html option (screenshot)', async () => {
+    await client.screenshot.direct({
+      page: {
+        html: '<div>Your first Doczilla PDF</div>'
+      }
+    })
+
+    expect(axiosMock.history.post.length).toBe(1)
+    expect(axiosMock.history.post[0].data).toEqual(JSON.stringify({
+      page: {
+        html: 'PGRpdj5Zb3VyIGZpcnN0IERvY3ppbGxhIFBERjwvZGl2Pg=='
+      }
+    }))
+  })
+
 })