add test Test_saveGradeRequestParsed_UnmarshalJSON checking that DB e…

…rrors are handled correctly in saveGradeRequestParsed.UnmarshalJSON()

app/api/items/save_grade_test.go

@@ -0,0 +1,40 @@
+package items
+
+import (
+	"errors"
+	"fmt"
+	"regexp"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/France-ioi/AlgoreaBackend/v2/app/database"
+	"github.com/France-ioi/AlgoreaBackend/v2/app/payloadstest"
+	"github.com/France-ioi/AlgoreaBackend/v2/app/token"
+	"github.com/France-ioi/AlgoreaBackend/v2/app/tokentest"
+	"github.com/France-ioi/AlgoreaBackend/v2/testhelpers/testoutput"
+)
+
+func Test_saveGradeRequestParsed_UnmarshalJSON(t *testing.T) {
+	testoutput.SuppressIfPasses(t)
+
+	db, mock := database.NewDBMock()
+	defer func() { _ = db.Close() }()
+
+	expectedError := errors.New("error")
+	mock.ExpectQuery("^" + regexp.QuoteMeta("SELECT public_key "+
+		"FROM `platforms` JOIN items ON items.platform_id = platforms.id WHERE (items.id = ?) LIMIT 1") + "$").
+		WithArgs(901756573345831409).WillReturnError(expectedError)
+
+	r := saveGradeRequestParsed{
+		store:     database.NewDataStore(db),
+		publicKey: tokentest.AlgoreaPlatformPublicKeyParsed,
+	}
+	assert.PanicsWithError(t, expectedError.Error(), func() {
+		_ = r.UnmarshalJSON([]byte(fmt.Sprintf(`{"score_token": %q, "answer_token": %q}`,
+			token.Generate(payloadstest.ScorePayloadFromGrader, tokentest.AlgoreaPlatformPrivateKeyParsed),
+			token.Generate(payloadstest.AnswerPayloadFromAlgoreaPlatform, tokentest.AlgoreaPlatformPrivateKeyParsed),
+		)))
+	})
+	assert.NoError(t, mock.ExpectationsWereMet())
+}