gh-ost/go/logic/migrator_test.go

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2022-09-06 13:48:48 +00:00
/*
Copyright 2022 GitHub Inc.
See https://github.com/github/gh-ost/blob/master/LICENSE
*/
package logic
import (
"errors"
"os"
"path/filepath"
"strings"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/openark/golib/tests"
"github.com/github/gh-ost/go/base"
"github.com/github/gh-ost/go/binlog"
"github.com/github/gh-ost/go/sql"
)
func TestMigratorOnChangelogEvent(t *testing.T) {
migrationContext := base.NewMigrationContext()
migrator := NewMigrator(migrationContext, "1.2.3")
t.Run("heartbeat", func(t *testing.T) {
columnValues := sql.ToColumnValues([]interface{}{
123,
time.Now().Unix(),
"heartbeat",
"2022-08-16T00:45:10.52Z",
})
tests.S(t).ExpectNil(migrator.onChangelogEvent(&binlog.BinlogDMLEvent{
DatabaseName: "test",
DML: binlog.InsertDML,
NewColumnValues: columnValues,
}))
})
t.Run("state-AllEventsUpToLockProcessed", func(t *testing.T) {
var wg sync.WaitGroup
wg.Add(1)
go func(wg *sync.WaitGroup) {
defer wg.Done()
es := <-migrator.applyEventsQueue
tests.S(t).ExpectNotNil(es)
tests.S(t).ExpectNotNil(es.writeFunc)
}(&wg)
columnValues := sql.ToColumnValues([]interface{}{
123,
time.Now().Unix(),
"state",
AllEventsUpToLockProcessed,
})
tests.S(t).ExpectNil(migrator.onChangelogEvent(&binlog.BinlogDMLEvent{
DatabaseName: "test",
DML: binlog.InsertDML,
NewColumnValues: columnValues,
}))
wg.Wait()
})
t.Run("state-GhostTableMigrated", func(t *testing.T) {
go func() {
tests.S(t).ExpectTrue(<-migrator.ghostTableMigrated)
}()
columnValues := sql.ToColumnValues([]interface{}{
123,
time.Now().Unix(),
"state",
GhostTableMigrated,
})
tests.S(t).ExpectNil(migrator.onChangelogEvent(&binlog.BinlogDMLEvent{
DatabaseName: "test",
DML: binlog.InsertDML,
NewColumnValues: columnValues,
}))
})
t.Run("state-Migrated", func(t *testing.T) {
columnValues := sql.ToColumnValues([]interface{}{
123,
time.Now().Unix(),
"state",
Migrated,
})
tests.S(t).ExpectNil(migrator.onChangelogEvent(&binlog.BinlogDMLEvent{
DatabaseName: "test",
DML: binlog.InsertDML,
NewColumnValues: columnValues,
}))
})
t.Run("state-ReadMigrationRangeValues", func(t *testing.T) {
columnValues := sql.ToColumnValues([]interface{}{
123,
time.Now().Unix(),
"state",
ReadMigrationRangeValues,
})
tests.S(t).ExpectNil(migrator.onChangelogEvent(&binlog.BinlogDMLEvent{
DatabaseName: "test",
DML: binlog.InsertDML,
NewColumnValues: columnValues,
}))
})
}
func TestMigratorValidateStatement(t *testing.T) {
t.Run("add-column", func(t *testing.T) {
migrationContext := base.NewMigrationContext()
migrator := NewMigrator(migrationContext, "1.2.3")
tests.S(t).ExpectNil(migrator.parser.ParseAlterStatement(`ALTER TABLE test ADD test_new VARCHAR(64) NOT NULL`))
tests.S(t).ExpectNil(migrator.validateAlterStatement())
tests.S(t).ExpectEquals(len(migrator.migrationContext.DroppedColumnsMap), 0)
})
t.Run("drop-column", func(t *testing.T) {
migrationContext := base.NewMigrationContext()
migrator := NewMigrator(migrationContext, "1.2.3")
tests.S(t).ExpectNil(migrator.parser.ParseAlterStatement(`ALTER TABLE test DROP abc`))
tests.S(t).ExpectNil(migrator.validateAlterStatement())
tests.S(t).ExpectEquals(len(migrator.migrationContext.DroppedColumnsMap), 1)
_, exists := migrator.migrationContext.DroppedColumnsMap["abc"]
tests.S(t).ExpectTrue(exists)
})
t.Run("rename-column", func(t *testing.T) {
migrationContext := base.NewMigrationContext()
migrator := NewMigrator(migrationContext, "1.2.3")
tests.S(t).ExpectNil(migrator.parser.ParseAlterStatement(`ALTER TABLE test CHANGE test123 test1234 bigint unsigned`))
err := migrator.validateAlterStatement()
tests.S(t).ExpectNotNil(err)
tests.S(t).ExpectTrue(strings.HasPrefix(err.Error(), "gh-ost believes the ALTER statement renames columns"))
tests.S(t).ExpectEquals(len(migrator.migrationContext.DroppedColumnsMap), 0)
})
t.Run("rename-column-approved", func(t *testing.T) {
migrationContext := base.NewMigrationContext()
migrator := NewMigrator(migrationContext, "1.2.3")
migrator.migrationContext.ApproveRenamedColumns = true
tests.S(t).ExpectNil(migrator.parser.ParseAlterStatement(`ALTER TABLE test CHANGE test123 test1234 bigint unsigned`))
tests.S(t).ExpectNil(migrator.validateAlterStatement())
tests.S(t).ExpectEquals(len(migrator.migrationContext.DroppedColumnsMap), 0)
})
t.Run("rename-table", func(t *testing.T) {
migrationContext := base.NewMigrationContext()
migrator := NewMigrator(migrationContext, "1.2.3")
tests.S(t).ExpectNil(migrator.parser.ParseAlterStatement(`ALTER TABLE test RENAME TO test_new`))
err := migrator.validateAlterStatement()
tests.S(t).ExpectNotNil(err)
tests.S(t).ExpectTrue(errors.Is(err, ErrMigratorUnsupportedRenameAlter))
tests.S(t).ExpectEquals(len(migrator.migrationContext.DroppedColumnsMap), 0)
})
}
func TestMigratorCreateFlagFiles(t *testing.T) {
tmpdir, err := os.MkdirTemp("", t.Name())
if err != nil {
panic(err)
}
defer os.RemoveAll(tmpdir)
migrationContext := base.NewMigrationContext()
migrationContext.PostponeCutOverFlagFile = filepath.Join(tmpdir, "cut-over.flag")
migrator := NewMigrator(migrationContext, "1.2.3")
tests.S(t).ExpectNil(migrator.createFlagFiles())
tests.S(t).ExpectNil(migrator.createFlagFiles()) // twice to test already-exists
_, err = os.Stat(migrationContext.PostponeCutOverFlagFile)
tests.S(t).ExpectNil(err)
}
func TestMigratorGetProgressPercent(t *testing.T) {
migrationContext := base.NewMigrationContext()
migrator := NewMigrator(migrationContext, "1.2.3")
{
tests.S(t).ExpectEquals(migrator.getProgressPercent(0), float64(100.0))
}
{
migrationContext.TotalRowsCopied = 250
tests.S(t).ExpectEquals(migrator.getProgressPercent(1000), float64(25.0))
}
}
func TestMigratorGetMigrationStateAndETA(t *testing.T) {
migrationContext := base.NewMigrationContext()
migrator := NewMigrator(migrationContext, "1.2.3")
now := time.Now()
migrationContext.RowCopyStartTime = now.Add(-time.Minute)
migrationContext.RowCopyEndTime = now
{
migrationContext.TotalRowsCopied = 456
state, eta, etaDuration := migrator.getMigrationStateAndETA(123456)
tests.S(t).ExpectEquals(state, "migrating")
tests.S(t).ExpectEquals(eta, "4h29m44s")
tests.S(t).ExpectEquals(etaDuration.String(), "4h29m44s")
}
{
migrationContext.TotalRowsCopied = 456
state, eta, etaDuration := migrator.getMigrationStateAndETA(456)
tests.S(t).ExpectEquals(state, "migrating")
tests.S(t).ExpectEquals(eta, "due")
tests.S(t).ExpectEquals(etaDuration.String(), "0s")
}
{
migrationContext.TotalRowsCopied = 123456
state, eta, etaDuration := migrator.getMigrationStateAndETA(456)
tests.S(t).ExpectEquals(state, "migrating")
tests.S(t).ExpectEquals(eta, "due")
tests.S(t).ExpectEquals(etaDuration.String(), "0s")
}
{
atomic.StoreInt64(&migrationContext.CountingRowsFlag, 1)
state, eta, etaDuration := migrator.getMigrationStateAndETA(123456)
tests.S(t).ExpectEquals(state, "counting rows")
tests.S(t).ExpectEquals(eta, "due")
tests.S(t).ExpectEquals(etaDuration.String(), "0s")
}
{
atomic.StoreInt64(&migrationContext.CountingRowsFlag, 0)
atomic.StoreInt64(&migrationContext.IsPostponingCutOver, 1)
state, eta, etaDuration := migrator.getMigrationStateAndETA(123456)
tests.S(t).ExpectEquals(state, "postponing cut-over")
tests.S(t).ExpectEquals(eta, "due")
tests.S(t).ExpectEquals(etaDuration.String(), "0s")
}
}
func TestMigratorShouldPrintStatus(t *testing.T) {
migrationContext := base.NewMigrationContext()
migrator := NewMigrator(migrationContext, "1.2.3")
tests.S(t).ExpectTrue(migrator.shouldPrintStatus(NoPrintStatusRule, 10, time.Second)) // test 'rule != HeuristicPrintStatusRule' return
tests.S(t).ExpectTrue(migrator.shouldPrintStatus(HeuristicPrintStatusRule, 10, time.Second)) // test 'etaDuration.Seconds() <= 60'
tests.S(t).ExpectTrue(migrator.shouldPrintStatus(HeuristicPrintStatusRule, 90, time.Second)) // test 'etaDuration.Seconds() <= 60' again
tests.S(t).ExpectTrue(migrator.shouldPrintStatus(HeuristicPrintStatusRule, 90, time.Minute)) // test 'etaDuration.Seconds() <= 180'
tests.S(t).ExpectTrue(migrator.shouldPrintStatus(HeuristicPrintStatusRule, 60, 90*time.Second)) // test 'elapsedSeconds <= 180'
tests.S(t).ExpectFalse(migrator.shouldPrintStatus(HeuristicPrintStatusRule, 61, 90*time.Second)) // test 'elapsedSeconds <= 180'
tests.S(t).ExpectFalse(migrator.shouldPrintStatus(HeuristicPrintStatusRule, 99, 210*time.Second)) // test 'elapsedSeconds <= 180'
tests.S(t).ExpectFalse(migrator.shouldPrintStatus(HeuristicPrintStatusRule, 12345, 86400*time.Second)) // test 'else'
tests.S(t).ExpectTrue(migrator.shouldPrintStatus(HeuristicPrintStatusRule, 30030, 86400*time.Second)) // test 'else' again
}