test(sidekick): missing codec_sample tests (#1629)

Author: coryan

internal/sidekick/internal/codec_sample/generate_test.go

@@ -0,0 +1,71 @@
+// Copyright 2025 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
+//
+//     https://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 codec_sample
+
+import (
+	"os"
+	"os/exec"
+	"path"
+	"path/filepath"
+	"testing"
+
+	"github.com/googleapis/librarian/internal/sidekick/internal/config"
+	"github.com/googleapis/librarian/internal/sidekick/internal/parser"
+)
+
+var (
+	testdataDir, _ = filepath.Abs("../../testdata")
+)
+
+func TestFromProtobuf(t *testing.T) {
+	if _, err := exec.LookPath("protoc"); err != nil {
+		t.Skip("skipping test because protoc is not installed")
+	}
+	outDir := t.TempDir()
+
+	cfg := &config.Config{
+		General: config.GeneralConfig{
+			SpecificationFormat: "protobuf",
+			ServiceConfig:       "google/cloud/secretmanager/v1/secretmanager_v1.yaml",
+			SpecificationSource: "google/cloud/secretmanager/v1",
+		},
+		Source: map[string]string{
+			"googleapis-root": path.Join(testdataDir, "googleapis"),
+		},
+		Codec: map[string]string{
+			"copyright-year":              "2025",
+			"not-for-publication":         "true",
+			"version":                     "0.1.0",
+			"skip-format":                 "true",
+			"proto:google.protobuf":       "package:google_cloud_protobuf/protobuf.dart",
+			"proto:google.cloud.location": "package:google_cloud_location/location.dart",
+		},
+	}
+	model, err := parser.CreateModel(cfg)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := Generate(model, outDir, cfg); err != nil {
+		t.Fatal(err)
+	}
+	filename := path.Join(outDir, "README.md")
+	stat, err := os.Stat(filename)
+	if os.IsNotExist(err) {
+		t.Errorf("missing %s: %s", filename, err)
+	}
+	if stat.Mode().Perm()|0666 != 0666 {
+		t.Errorf("generated files should not be executable %s: %o", filename, stat.Mode())
+	}
+}