Add back entry_test.go

internal/artifacts/entry_test.go

+package artifacts
+
+import (
+	"archive/zip"
+	"encoding/base64"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"testing"
+
+	"gitlab.com/gitlab-org/gitlab-workhorse/internal/testhelper"
+)
+
+func testEntryServer(t *testing.T, archive string, entry string) *httptest.ResponseRecorder {
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("/url/path", func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != "GET" {
+			t.Fatal("Expected GET request")
+		}
+
+		encodedEntry := base64.StdEncoding.EncodeToString([]byte(entry))
+		jsonParams := fmt.Sprintf(`{"Archive":"%s","Entry":"%s"}`, archive, encodedEntry)
+		data := base64.URLEncoding.EncodeToString([]byte(jsonParams))
+
+		SendEntry.Inject(w, r, data)
+	})
+
+	httpRequest, err := http.NewRequest("GET", "/url/path", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	response := httptest.NewRecorder()
+	mux.ServeHTTP(response, httpRequest)
+	return response
+}
+
+func TestDownloadingFromValidArchive(t *testing.T) {
+	tempFile, err := ioutil.TempFile("", "uploads")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer tempFile.Close()
+	defer os.Remove(tempFile.Name())
+
+	archive := zip.NewWriter(tempFile)
+	defer archive.Close()
+	fileInArchive, err := archive.Create("test.txt")
+	if err != nil {
+		t.Fatal(err)
+	}
+	fmt.Fprint(fileInArchive, "testtest")
+	archive.Close()
+
+	response := testEntryServer(t, tempFile.Name(), "test.txt")
+
+	testhelper.AssertResponseCode(t, response, 200)
+
+	testhelper.AssertResponseHeader(t, response,
+		"Content-Type",
+		"text/plain; charset=utf-8")
+	testhelper.AssertResponseHeader(t, response,
+		"Content-Disposition",
+		"attachment; filename=\"test.txt\"")
+
+	testhelper.AssertResponseBody(t, response, "testtest")
+}
+
+func TestDownloadingNonExistingFile(t *testing.T) {
+	tempFile, err := ioutil.TempFile("", "uploads")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer tempFile.Close()
+	defer os.Remove(tempFile.Name())
+
+	archive := zip.NewWriter(tempFile)
+	defer archive.Close()
+	archive.Close()
+
+	response := testEntryServer(t, tempFile.Name(), "test")
+	testhelper.AssertResponseCode(t, response, 404)
+}
+
+func TestDownloadingFromInvalidArchive(t *testing.T) {
+	response := testEntryServer(t, "path/to/non/existing/file", "test")
+	testhelper.AssertResponseCode(t, response, 404)
+}
+
+func TestIncompleteApiResponse(t *testing.T) {
+	response := testEntryServer(t, "", "")
+	testhelper.AssertResponseCode(t, response, 500)
+}