Deploy main eacf1e7 to prod

Replaces #559, which conflicted.

Model: opus-5-5

internal/db/migrations/migrations_test.go

@@ -0,0 +1,57 @@
+package migrations_test
+
+import (
+	"database/sql"
+	"log/slog"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+	_ "modernc.org/sqlite"
+	"sneak.berlin/go/webhooker/internal/db/migrations"
+	"sneak.berlin/go/webhooker/internal/gormlog"
+)
+
+// TestApplyRunsEachFileOnce applies each kind of database file's
+// migrations to a new file twice. The first time records every file.
+// The second finds them all recorded and runs none, which is the only
+// way it can succeed: 001_schema.sql creates tables that then exist.
+func TestApplyRunsEachFileOnce(t *testing.T) {
+	t.Parallel()
+
+	for _, dir := range []string{
+		migrations.Main, migrations.Events, migrations.Archive,
+	} {
+		t.Run(dir, func(t *testing.T) {
+			t.Parallel()
+
+			sqlDB, err := sql.Open(
+				"sqlite", filepath.Join(t.TempDir(), "test.db"),
+			)
+			require.NoError(t, err)
+
+			t.Cleanup(func() { _ = sqlDB.Close() })
+
+			db, err := gorm.Open(
+				sqlite.Dialector{Conn: sqlDB},
+				&gorm.Config{
+					Logger: gormlog.New(slog.New(slog.DiscardHandler)),
+				},
+			)
+			require.NoError(t, err)
+
+			require.NoError(t, migrations.Apply(db, dir))
+			require.NoError(t, migrations.Apply(db, dir))
+
+			var versions string
+
+			require.NoError(t, sqlDB.QueryRowContext(t.Context(),
+				"SELECT group_concat(version) FROM schema_migrations",
+			).Scan(&versions))
+			assert.Equal(t, "0,1", versions)
+		})
+	}
+}