AB#2299 License check in CLI during init (#366)

* license server interaction
* logic to read from license file
* print license information during init
Signed-off-by: Fabian Kammel <fk@edgeless.systems>
Co-authored-by: Moritz Eckert <m1gh7ym0@gmail.com>

internal/license/license_integration_test.go

@@ -0,0 +1,64 @@
+//go:build integration
+
+package license
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCheckQuotaIntegration(t *testing.T) {
+	testCases := map[string]struct {
+		license   string
+		action    string
+		wantQuota int
+		wantError bool
+	}{
+		"ES license has quota 256": {
+			license:   "***REMOVED***",
+			action:    test,
+			wantQuota: 256,
+		},
+		"OSS license has quota 8": {
+			license:   CommunityLicense,
+			action:    test,
+			wantQuota: 8,
+		},
+		"OSS license missing action": {
+			license:   CommunityLicense,
+			action:    "",
+			wantQuota: 8,
+		},
+		"Empty license assumes community": {
+			license:   "",
+			action:    test,
+			wantQuota: 8,
+		},
+		"Empty request": {
+			license:   "",
+			action:    "",
+			wantQuota: 8,
+		},
+	}
+
+	for name, tc := range testCases {
+		t.Run(name, func(t *testing.T) {
+			assert := assert.New(t)
+
+			client := NewClient()
+
+			resp, err := client.CheckQuota(CheckQuotaRequest{
+				Action:  tc.action,
+				License: tc.license,
+			})
+
+			if tc.wantError {
+				assert.Error(err)
+				return
+			}
+			assert.NoError(err)
+			assert.Equal(tc.wantQuota, resp.Quota)
+		})
+	}
+}