Merge pull request #871 from Jrank2013/locked_exercise_reporting

Error message returned if the track is locked

cmd/download.go

@@ -1,10 +1,12 @@
 package cmd
 
 import (
+	"bytes"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"net/http"
 	netURL "net/url"
 	"os"
@@ -187,7 +189,14 @@ func newDownload(flags *pflag.FlagSet, usrCfg *viper.Viper) (*download, error) {
 	}
 	defer res.Body.Close()
 
-	if err := json.NewDecoder(res.Body).Decode(&d.payload); err != nil {
+	if res.StatusCode < 200 || res.StatusCode > 299 {
+		return nil, decodedAPIError(res)
+	}
+
+	body, _ := ioutil.ReadAll(res.Body)
+	res.Body = ioutil.NopCloser(bytes.NewReader(body))
+
+	if err := json.Unmarshal(body, &d.payload); err != nil {
 		return nil, decodedAPIError(res)
 	}
 

cmd/download_test.go

@@ -272,6 +272,40 @@ func assertDownloadedCorrectFiles(t *testing.T, targetDir string) {
 	assert.True(t, os.IsNotExist(err), "It should not write the file if empty.")
 }
 
+func TestDownloadError(t *testing.T) {
+	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusBadRequest)
+		fmt.Fprintf(w, `{"error": {"type": "error", "message": "test error"}}`)
+	})
+
+	ts := httptest.NewServer(handler)
+	defer ts.Close()
+
+	tmpDir, err := ioutil.TempDir("", "submit-err-tmp-dir")
+	defer os.RemoveAll(tmpDir)
+	assert.NoError(t, err)
+
+	v := viper.New()
+	v.Set("token", "abc123")
+	v.Set("workspace", tmpDir)
+	v.Set("apibaseurl", ts.URL)
+
+	cfg := config.Config{
+		Persister:       config.InMemoryPersister{},
+		UserViperConfig: v,
+		DefaultBaseURL:  "http://example.com",
+	}
+
+	flags := pflag.NewFlagSet("fake", pflag.PanicOnError)
+	setupDownloadFlags(flags)
+	flags.Set("uuid", "value")
+
+	err = runDownload(cfg, flags, []string{})
+
+	assert.Equal(t, "test error", err.Error())
+
+}
+
 const payloadTemplate = `
 {
 	"solution": {