chore(go): inject release service dependencies and mirror local validation

internal/vociferate/vociferate_internal_test.go

@@ -3,9 +3,54 @@ package vociferate
 import (
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 )
 
+type stubFileSystem struct {
+	files map[string][]byte
+}
+
+func newStubFileSystem(files map[string]string) *stubFileSystem {
+	backing := make(map[string][]byte, len(files))
+	for path, contents := range files {
+		backing[path] = []byte(contents)
+	}
+	return &stubFileSystem{files: backing}
+}
+
+func (fs *stubFileSystem) ReadFile(path string) ([]byte, error) {
+	contents, ok := fs.files[path]
+	if !ok {
+		return nil, os.ErrNotExist
+	}
+	clone := make([]byte, len(contents))
+	copy(clone, contents)
+	return clone, nil
+}
+
+func (fs *stubFileSystem) WriteFile(path string, data []byte, _ os.FileMode) error {
+	clone := make([]byte, len(data))
+	copy(clone, data)
+	fs.files[path] = clone
+	return nil
+}
+
+type stubEnvironment map[string]string
+
+func (env stubEnvironment) Getenv(key string) string {
+	return env[key]
+}
+
+type stubGitRunner struct {
+	commit string
+	ok     bool
+}
+
+func (runner stubGitRunner) FirstCommitShortHash(_ string) (string, bool) {
+	return runner.commit, runner.ok
+}
+
 func TestNormalizeRepoURL(t *testing.T) {
 	t.Parallel()
 
@@ -159,3 +204,110 @@ func TestResolveOptions_UsesUppercaseChangelogDefault(t *testing.T) {
 		t.Fatalf("resolved changelog = %q, want %q", resolved.Changelog, "CHANGELOG.md")
 	}
 }
+
+func TestNewService_ValidatesDependencies(t *testing.T) {
+	t.Parallel()
+
+	validFS := newStubFileSystem(nil)
+	validEnv := stubEnvironment{}
+	validGit := stubGitRunner{}
+
+	tests := []struct {
+		name    string
+		deps    Dependencies
+		wantErr string
+	}{
+		{
+			name:    "missing file system",
+			deps:    Dependencies{Environment: validEnv, Git: validGit},
+			wantErr: "file system dependency must not be nil",
+		},
+		{
+			name:    "missing environment",
+			deps:    Dependencies{FileSystem: validFS, Git: validGit},
+			wantErr: "environment dependency must not be nil",
+		},
+		{
+			name:    "missing git runner",
+			deps:    Dependencies{FileSystem: validFS, Environment: validEnv},
+			wantErr: "git runner dependency must not be nil",
+		},
+	}
+
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+			_, err := NewService(tt.deps)
+			if err == nil || err.Error() != tt.wantErr {
+				t.Fatalf("NewService() error = %v, want %q", err, tt.wantErr)
+			}
+		})
+	}
+}
+
+func TestServicePrepare_UsesInjectedEnvironmentForRepositoryLinks(t *testing.T) {
+	t.Parallel()
+
+	rootDir := "/repo"
+	fs := newStubFileSystem(map[string]string{
+		filepath.Join(rootDir, "release-version"): "1.1.6\n",
+		filepath.Join(rootDir, "CHANGELOG.md"):    "# Changelog\n\n## [Unreleased]\n\n### Added\n\n- New thing.\n\n## [1.1.6] - 2017-12-20\n\n### Fixed\n\n- Historical note.\n",
+	})
+
+	svc, err := NewService(Dependencies{
+		FileSystem:  fs,
+		Environment: stubEnvironment{"GITHUB_SERVER_URL": "https://git.hrafn.xyz", "GITHUB_REPOSITORY": "aether/vociferate"},
+		Git:         stubGitRunner{commit: "deadbee", ok: true},
+	})
+	if err != nil {
+		t.Fatalf("NewService() unexpected error: %v", err)
+	}
+
+	err = svc.Prepare(rootDir, "1.1.7", "2026-03-21", Options{})
+	if err != nil {
+		t.Fatalf("Prepare() unexpected error: %v", err)
+	}
+
+	updated := string(fs.files[filepath.Join(rootDir, "CHANGELOG.md")])
+	if !contains(updated, "[Unreleased]: https://git.hrafn.xyz/aether/vociferate/compare/v1.1.7...main") {
+		t.Fatalf("Prepare() changelog missing injected environment link:\n%s", updated)
+	}
+	if !contains(updated, "[1.1.7]: https://git.hrafn.xyz/aether/vociferate/compare/v1.1.6...v1.1.7") {
+		t.Fatalf("Prepare() changelog missing injected release link:\n%s", updated)
+	}
+}
+
+func TestServicePrepare_UsesInjectedGitRunnerForFirstCommitLink(t *testing.T) {
+	t.Parallel()
+
+	rootDir := "/repo"
+	fs := newStubFileSystem(map[string]string{
+		filepath.Join(rootDir, "release-version"): "1.1.6\n",
+		filepath.Join(rootDir, "CHANGELOG.md"):    "# Changelog\n\n## [Unreleased]\n\n### Added\n\n- New thing.\n\n## [1.1.6] - 2017-12-20\n\n### Fixed\n\n- Historical note.\n",
+		filepath.Join(rootDir, ".git", "config"):  "[remote \"origin\"]\n\turl = git@git.hrafn.xyz:aether/vociferate.git\n",
+	})
+
+	svc, err := NewService(Dependencies{
+		FileSystem:  fs,
+		Environment: stubEnvironment{},
+		Git:         stubGitRunner{commit: "abc1234", ok: true},
+	})
+	if err != nil {
+		t.Fatalf("NewService() unexpected error: %v", err)
+	}
+
+	err = svc.Prepare(rootDir, "1.1.7", "2026-03-21", Options{})
+	if err != nil {
+		t.Fatalf("Prepare() unexpected error: %v", err)
+	}
+
+	updated := string(fs.files[filepath.Join(rootDir, "CHANGELOG.md")])
+	if !contains(updated, "[1.1.6]: https://git.hrafn.xyz/aether/vociferate/compare/abc1234...v1.1.6") {
+		t.Fatalf("Prepare() changelog missing injected git link:\n%s", updated)
+	}
+}
+
+func contains(text, fragment string) bool {
+	return len(fragment) > 0 && strings.Contains(text, fragment)
+}