cli: add unit tests to telemetry

cli/telemetry/telemetry_test.go

@@ -0,0 +1,85 @@
+package telemetry
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/spf13/cobra"
+	"github.com/stretchr/testify/assert"
+)
+
+type roundTripFunc func(req *http.Request) *http.Response
+
+func (f roundTripFunc) RoundTrip(req *http.Request) (*http.Response, error) {
+	return f(req), nil
+}
+
+func newTestClient(fn roundTripFunc) *http.Client {
+	return &http.Client{
+		Transport: fn,
+	}
+}
+
+func TestSendTelemetry(t *testing.T) {
+	rootTestCmd := &cobra.Command{Version: "0.0.0-dev"}
+	goodTestCmd := &cobra.Command{}
+	rootTestCmd.AddCommand(goodTestCmd)
+
+	badTestCmd := &cobra.Command{}
+
+	testCases := map[string]struct {
+		cmd                *cobra.Command
+		cmdErr             error
+		serverResponseCode int
+		wantError          bool
+	}{
+		"success no cmdError": {
+			cmd:                goodTestCmd,
+			cmdErr:             nil,
+			serverResponseCode: http.StatusOK,
+			wantError:          false,
+		},
+		"success with cmdError": {
+			cmd:                goodTestCmd,
+			cmdErr:             fmt.Errorf("test error"),
+			serverResponseCode: http.StatusOK,
+			wantError:          false,
+		},
+		"bad command": {
+			cmd:                badTestCmd,
+			cmdErr:             nil,
+			serverResponseCode: http.StatusOK,
+			wantError:          true,
+		},
+		"bad http response": {
+			cmd:                goodTestCmd,
+			cmdErr:             nil,
+			serverResponseCode: http.StatusInternalServerError,
+			wantError:          true,
+		},
+	}
+
+	for name, tc := range testCases {
+		t.Run(name, func(t *testing.T) {
+			assert := assert.New(t)
+
+			client := &Client{
+				httpClient: newTestClient(func(_ *http.Request) *http.Response {
+					return &http.Response{
+						StatusCode: tc.serverResponseCode,
+					}
+				}),
+			}
+
+			err := client.SendTelemetry(context.Background(), tc.cmd, tc.cmdErr)
+
+			if tc.wantError {
+				assert.Error(err)
+				return
+			}
+			assert.NoError(err)
+		})
+	}
+}