test: add test of json unmarshall for twitter

internal/twitter/fetch.go

@@ -7,16 +7,24 @@ import (
 	"github.com/azimut/cli-view/internal/fetch"
 )
 
-func Fetch(url, ua string, timeout time.Duration) (tweet *Embedded, err error) {
-	url, err = EffectiveUrl(url)
+func Fetch(tweetUrl, ua string, timeout time.Duration) (*Embedded, error) {
+	embedUrl, err := EffectiveUrl(tweetUrl)
 	if err != nil {
 		return nil, err
 	}
-	res, err := fetch.Fetch(url, ua, timeout)
+	rawJson, err := fetch.Fetch(embedUrl, ua, timeout)
 	if err != nil {
 		return nil, err
 	}
-	b := []byte(res)
+	tweet, err := toEmbedded(rawJson)
+	if err != nil {
+		return nil, err
+	}
+	return tweet, nil
+}
+
+func toEmbedded(rawJson string) (tweet *Embedded, err error) {
+	b := []byte(rawJson)
 	if err = json.Unmarshal(b, &tweet); err != nil {
 		return nil, err
 	}

internal/twitter/fetch_test.go

@@ -1,15 +1,40 @@
 package twitter
 
 import (
+	"io/ioutil"
 	"testing"
 	"time"
 )
 
 const URL = `https://twitter.com/TwitterDev/status/1443269993676763138`
 
+var TweetFiles = []string{
+	"tweet-image-AND-quote.json",
+	"tweet.json",
+	"tweet-mult-image.json",
+	"tweet-link.json",
+	"tweet-quote.json",
+	"tweet-url-with-image.json",
+}
+
 func TestTWFetch(t *testing.T) {
 	_, err := Fetch(URL, "Twitter_View/0.1", time.Second*10)
 	if err != nil {
 		t.Fail()
 	}
 }
+
+func TestUnmarshall(t *testing.T) {
+	for _, tweetFile := range TweetFiles {
+		bytes, err := ioutil.ReadFile("../../testdata/" + tweetFile)
+		if err != nil {
+			t.Fail()
+			break
+		}
+		_, err = toEmbedded(string(bytes))
+		if err != nil {
+			t.Fail()
+			break
+		}
+	}
+}