mirror of
https://github.com/tailscale/tailscale.git
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87 lines
2.8 KiB
Go
87 lines
2.8 KiB
Go
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// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build !plan9
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package conf
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import (
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"os"
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"path/filepath"
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"strings"
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"testing"
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"github.com/google/go-cmp/cmp"
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"tailscale.com/types/ptr"
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)
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// Test that the config file can be at the root of the object, or in a versioned sub-object.
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// or {"version": "v1beta1", "a-beta-config": "a-beta-value", "v1alpha1": {"authKey": "abc123"}}
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func TestVersionedConfig(t *testing.T) {
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testCases := map[string]struct {
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inputConfig string
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expectedConfig ConfigV1Alpha1
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expectedError string
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}{
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"root_config_v1alpha1": {
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inputConfig: `{"version": "v1alpha1", "authKey": "abc123"}`,
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expectedConfig: ConfigV1Alpha1{AuthKey: ptr.To("abc123")},
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},
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"backwards_compat_v1alpha1_config": {
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// Client doesn't know about v1beta1, so it should read in v1alpha1.
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inputConfig: `{"version": "v1beta1", "beta-key": "beta-value", "authKey": "def456", "v1alpha1": {"authKey": "abc123"}}`,
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expectedConfig: ConfigV1Alpha1{AuthKey: ptr.To("abc123")},
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},
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"unknown_key_allowed": {
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// Adding new keys to the config doesn't require a version bump.
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inputConfig: `{"version": "v1alpha1", "unknown-key": "unknown-value", "authKey": "abc123"}`,
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expectedConfig: ConfigV1Alpha1{AuthKey: ptr.To("abc123")},
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},
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"version_only_no_authkey": {
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inputConfig: `{"version": "v1alpha1"}`,
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expectedConfig: ConfigV1Alpha1{},
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},
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"both_config_v1alpha1": {
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inputConfig: `{"version": "v1alpha1", "authKey": "abc123", "v1alpha1": {"authKey": "def456"}}`,
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expectedError: "both root and v1alpha1 config provided",
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},
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"empty_config": {
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inputConfig: `{}`,
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expectedError: `no "version" field provided`,
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},
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"v1beta1_without_backwards_compat": {
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inputConfig: `{"version": "v1beta1", "beta-key": "beta-value", "authKey": "def456"}`,
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expectedError: `unsupported "version" value "v1beta1"; want "v1alpha1"`,
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},
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}
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for name, tc := range testCases {
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t.Run(name, func(t *testing.T) {
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dir := t.TempDir()
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path := filepath.Join(dir, "config.json")
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if err := os.WriteFile(path, []byte(tc.inputConfig), 0644); err != nil {
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t.Fatalf("failed to write config file: %v", err)
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}
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cfg, err := Load(path)
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switch {
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case tc.expectedError == "" && err != nil:
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t.Fatalf("unexpected error: %v", err)
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case tc.expectedError != "":
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if err == nil {
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t.Fatalf("expected error %q, got nil", tc.expectedError)
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} else if !strings.Contains(err.Error(), tc.expectedError) {
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t.Fatalf("expected error %q, got %q", tc.expectedError, err.Error())
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}
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return
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}
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if cfg.Version != "v1alpha1" {
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t.Fatalf("expected version %q, got %q", "v1alpha1", cfg.Version)
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}
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// Diff actual vs expected config.
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if diff := cmp.Diff(cfg.Parsed, tc.expectedConfig); diff != "" {
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t.Fatalf("Unexpected parsed config (-got +want):\n%s", diff)
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}
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})
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}
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}
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