Add support for downloading content

Add support for downloading content for creating
the merged helm charts. This api will be used mainly
by the profile api to create a converged chart which
will then be created by the instantiation code
P2: Add unit tests for archive.go
    Add download method for profile.go
    Update comments for download method
P3: Add unit test for empty files
P4: Add unit tests for Download functions
P5: Rebase against new folder structure

Issue-ID: MULTICLOUD-291
Change-Id: I9779eaf95366f527f0360eaddea663722c13b196
Signed-off-by: Kiran Kamineni <kiran.k.kamineni@intel.com>

1 files changed, 99 insertions, 0 deletions

diff --git a/src/k8splugin/internal/rb/profile_test.go b/src/k8splugin/internal/rb/profile_test.go
index 15ff8951..d97969de 100644
--- a/src/k8splugin/internal/rb/profile_test.go
+++ b/src/k8splugin/internal/rb/profile_test.go
@@ -19,6 +19,7 @@
 package rb
 
 import (
+	"bytes"
 	"k8splugin/internal/db"
 	"reflect"
 	"sort"
@@ -424,3 +425,101 @@ func TestUploadProfile(t *testing.T) {
 		})
 	}
 }
+
+func TestDownloadProfile(t *testing.T) {
+	testCases := []struct {
+		label         string
+		inp           string
+		expected      []byte
+		expectedError string
+		mockdb        *db.MockDB
+	}{
+		{
+			label: "Download Resource Bundle Profile",
+			inp:   "123e4567-e89b-12d3-a456-426655440000",
+			expected: []byte{
+				0x1f, 0x8b, 0x08, 0x08, 0xb0, 0x6b, 0xf4, 0x5b,
+				0x00, 0x03, 0x74, 0x65, 0x73, 0x74, 0x2e, 0x74,
+				0x61, 0x72, 0x00, 0xed, 0xce, 0x41, 0x0a, 0xc2,
+				0x30, 0x10, 0x85, 0xe1, 0xac, 0x3d, 0x45, 0x4e,
+				0x50, 0x12, 0xd2, 0xc4, 0xe3, 0x48, 0xa0, 0x01,
+				0x4b, 0x52, 0x0b, 0xed, 0x88, 0x1e, 0xdf, 0x48,
+				0x11, 0x5c, 0x08, 0xa5, 0x8b, 0x52, 0x84, 0xff,
+				0xdb, 0xbc, 0x61, 0x66, 0x16, 0x4f, 0xd2, 0x2c,
+				0x8d, 0x3c, 0x45, 0xed, 0xc8, 0x54, 0x21, 0xb4,
+				0xef, 0xb4, 0x67, 0x6f, 0xbe, 0x73, 0x61, 0x9d,
+				0xb2, 0xce, 0xd5, 0x55, 0xf0, 0xde, 0xd7, 0x3f,
+				0xdb, 0xd6, 0x49, 0x69, 0xb3, 0x67, 0xa9, 0x8f,
+				0xfb, 0x2c, 0x71, 0xd2, 0x5a, 0xc5, 0xee, 0x92,
+				0x73, 0x8e, 0x43, 0x7f, 0x4b, 0x3f, 0xff, 0xd6,
+				0xee, 0x7f, 0xea, 0x9a, 0x4a, 0x19, 0x1f, 0xe3,
+				0x54, 0xba, 0xd3, 0xd1, 0x55, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x1b, 0xbc, 0x00, 0xb5, 0xe8,
+				0x4a, 0xf9, 0x00, 0x28, 0x00, 0x00,
+			},
+			mockdb: &db.MockDB{
+				Items: map[string]map[string][]byte{
+					"123e4567-e89b-12d3-a456-426655440000": {
+						"metadata": []byte(
+							"{\"name\":\"testresourcebundle\"," +
+								"\"namespace\":\"default\"," +
+								"\"uuid\":\"123e4567-e89b-12d3-a456-426655440000\"," +
+								"\"rbdid\":\"abcde123-e89b-8888-a456-986655447236\"," +
+								"\"kubernetesversion\":\"1.12.3\"}"),
+						"content": []byte("H4sICLBr9FsAA3Rlc3QudGFyAO3OQQrCMBCF4aw9RU5" +
+							"QEtLE40igAUtSC+2IHt9IEVwIpYtShP/bvGFmFk/SLI08Re3IVCG077Rn" +
+							"b75zYZ2yztVV8N7XP9vWSWmzZ6mP+yxx0lrF7pJzjkN/Sz//1u5/6ppKG" +
+							"R/jVLrT0VUAAAAAAAAAAAAAAAAAABu8ALXoSvkAKAAA"),
+					},
+				},
+			},
+		},
+		{
+			label:         "Download with an Invalid Resource Bundle Profile",
+			inp:           "123e4567-e89b-12d3-a456-426655440000",
+			expectedError: "Invalid Profile ID provided",
+			mockdb: &db.MockDB{
+				Items: map[string]map[string][]byte{
+					"123e4567-e89b-12d3-a456-426655441111": {
+						"metadata": []byte(
+							"{\"name\":\"testresourcebundle\"," +
+								"\"uuid\":\"123e4567-e89b-12d3-a456-426655441111\"," +
+								"\"namespace\":\"default\"," +
+								"\"rbdid\":\"abcde123-e89b-8888-a456-986655447236\"," +
+								"\"kubernetesversion\":\"1.12.3\"}"),
+					},
+				},
+			},
+		},
+		{
+			label:         "Download Error",
+			expectedError: "DB Error",
+			inp:           "123e4567-e89b-12d3-a456-426655440000",
+			mockdb: &db.MockDB{
+				Err: pkgerrors.New("DB Error"),
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+		t.Run(testCase.label, func(t *testing.T) {
+			db.DBconn = testCase.mockdb
+			impl := NewProfileClient()
+			data, err := impl.Download(testCase.inp)
+			if err != nil {
+				if testCase.expectedError == "" {
+					t.Errorf("Download returned an unexpected error %s", err)
+				}
+				if strings.Contains(err.Error(), testCase.expectedError) == false {
+					t.Errorf("Download returned an unexpected error %s", err)
+				}
+			} else {
+				if bytes.Equal(testCase.expected, data) == false {
+					t.Errorf("Download returned unexpected data: got %v - expected %v",
+						data, testCase.expected)
+				}
+			}
+		})
+	}
+}