package inventory

import (
	"strings"
	"testing"
)

// **The move of the chain has a switch, made by the last migration and written by no migration** (ADR 0408 §8, issue
// 1089): migration 0104 makes the one-row table chain_moved, and does not touch a table of the chain, which a later
// delivery drops once the move is read back.
func TestMigration0104MakesTheSwitchOfTheChainsMoveAndNothingElse(t *testing.T) {
	migrations, err := Migrations()
	if err != nil {
		t.Fatal(err)
	}
	var found bool
	for _, m := range migrations {
		if m.Number != 104 {
			continue
		}
		found = true
		sql := strings.ToLower(m.SQL)
		if !strings.Contains(sql, "create table chain_moved") || !strings.Contains(sql, "check (only_one)") {
			t.Errorf("migration 0104 does not make the one-row chain_moved:\n%s", m.SQL)
		}
		for _, line := range strings.Split(sql, "\n") {
			if strings.HasPrefix(strings.TrimSpace(line), "--") {
				continue
			}
			for _, verb := range []string{"drop ", "insert ", "delete ", "update ", "alter "} {
				if strings.Contains(line, verb) {
					t.Errorf("migration 0104 does more than make the switch: %q", line)
				}
			}
		}
	}
	if !found {
		t.Fatal("no migration 0104")
	}
}