feat: Add https tar.gz remote source for context (#1519)

* feat: Add https tar.gz remote source for context

* Add license header

* add license header

Co-authored-by: Tejal Desai <tejal29@gmail.com>

pkg/buildcontext/https_test.go

@@ -0,0 +1,68 @@
+/*
+Copyright 2018 Google LLC
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package buildcontext
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestBuildWithHttpsTar(t *testing.T) {
+
+	tests := []struct {
+		name          string
+		serverHandler http.HandlerFunc
+	}{
+		{
+			name: "test http bad status",
+			serverHandler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				w.WriteHeader(http.StatusBadRequest)
+				_, err := w.Write([]byte("corrupted message"))
+				if err != nil {
+					t.Fatalf("Error sending response: %v", err)
+				}
+			}),
+		},
+		{
+			name: "test http bad data",
+			serverHandler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				w.WriteHeader(http.StatusOK)
+				_, err := w.Write([]byte("corrupted message"))
+				if err != nil {
+					t.Fatalf("Error sending response: %v", err)
+				}
+			}),
+		},
+	}
+
+	for _, tcase := range tests {
+		t.Run(tcase.name, func(t *testing.T) {
+			server := httptest.NewServer(tcase.serverHandler)
+			defer server.Close()
+
+			context := &HTTPSTar{
+				context: server.URL + "/data.tar.gz",
+			}
+
+			_, err := context.UnpackTarFromBuildContext()
+			if err == nil {
+				t.Fatalf("Error expected but not returned: %s", err)
+			}
+		})
+	}
+}