small fix, don't worry about it

app/backend/internal/database/migrations_test.go

@@ -0,0 +1,63 @@
+package database
+
+import (
+	"os"
+	"path/filepath"
+	"reflect"
+	"testing"
+)
+
+func TestIsManagedMigrationFile(t *testing.T) {
+	cases := []struct {
+		name     string
+		fileName string
+		want     bool
+	}{
+		{name: "valid triple digit migration", fileName: "001_initial_schema.sql", want: true},
+		{name: "supports higher migration number", fileName: "120_add_table.sql", want: true},
+		{name: "legacy sqlite migration excluded", fileName: "0001_init.sql", want: false},
+		{name: "backup file excluded", fileName: "001_initial_schema.sql.bak", want: false},
+		{name: "non migration sql excluded", fileName: "seed.sql", want: false},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			got := isManagedMigrationFile(tc.fileName)
+			if got != tc.want {
+				t.Fatalf("isManagedMigrationFile(%q) = %v, want %v", tc.fileName, got, tc.want)
+			}
+		})
+	}
+}
+
+func TestListManagedMigrationFiles(t *testing.T) {
+	dir := t.TempDir()
+	files := []string{
+		"020_add_database_templates.sql",
+		"001_initial_schema.sql",
+		"0001_init.sql",
+		"README.txt",
+		"021_expand_database_service_types.sql",
+	}
+
+	for _, file := range files {
+		path := filepath.Join(dir, file)
+		if err := os.WriteFile(path, []byte("-- test"), 0o644); err != nil {
+			t.Fatalf("failed to write temp file %s: %v", file, err)
+		}
+	}
+
+	got, err := listManagedMigrationFiles(dir)
+	if err != nil {
+		t.Fatalf("listManagedMigrationFiles returned error: %v", err)
+	}
+
+	want := []string{
+		"001_initial_schema.sql",
+		"020_add_database_templates.sql",
+		"021_expand_database_service_types.sql",
+	}
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("listManagedMigrationFiles = %v, want %v", got, want)
+	}
+}