Make 'tweet not in database' a named error that can be checked for

pkg/persistence/tweet_queries.go

@@ -132,7 +132,11 @@ func (p Profile) GetTweetById(id TweetID) (Tweet, error) {
     `, id)
 
 	if err != nil {
-		return Tweet{}, fmt.Errorf("Error executing GetTweetByID(%d):\n  %w", id, err)
+		if err == sql.ErrNoRows {
+			return Tweet{}, fmt.Errorf("GetTweetById %d: %w", id, ErrNotInDB)
+		} else {
+			panic(err)
+		}
 	}
 
 	t.Spaces = []Space{}

pkg/persistence/tweet_queries_test.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/go-test/deep"
 
+	"gitlab.com/offline-twitter/twitter_offline_engine/pkg/persistence"
 	"gitlab.com/offline-twitter/twitter_offline_engine/pkg/scraper"
 )
 
@@ -326,3 +327,12 @@ func TestCheckTweetContentDownloadNeeded(t *testing.T) {
 	// Should no longer need a download
 	assert.False(profile.CheckTweetContentDownloadNeeded(tweet))
 }
+
+func TestLoadMissingTweet(t *testing.T) {
+	profile_path := "test_profiles/TestTweetQueries"
+	profile := create_or_load_profile(profile_path)
+
+	_, err := profile.GetTweetById(scraper.TweetID(6234234)) // Random number
+	require.Error(t, err)
+	assert.ErrorIs(t, err, persistence.ErrNotInDB)
+}