wehub-resource-sync
75f3dd141c
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61 lines
2.4 KiB
Go
61 lines
2.4 KiB
Go
package walmath_test
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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"databasus-backend/internal/util/walmath"
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)
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func Test_NewWalSegmentNo_LsnInsideSegment_ReturnsSegmentNumber(t *testing.T) {
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segNo := walmath.NewWalSegmentNo(walmath.LSN(walmath.WalSegmentSize * 5))
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assert.Equal(t, walmath.WalSegmentNo(5), segNo)
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segNo = walmath.NewWalSegmentNo(walmath.LSN(walmath.WalSegmentSize*5 + 12345))
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assert.Equal(t, walmath.WalSegmentNo(5), segNo)
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}
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func Test_GetSegmentNoFromLsn_LsnAtSegmentBoundary_ReturnsNextSegment(t *testing.T) {
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assert.Equal(t, uint64(0), walmath.GetSegmentNoFromLsn(walmath.LSN(walmath.WalSegmentSize-1)))
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assert.Equal(t, uint64(1), walmath.GetSegmentNoFromLsn(walmath.LSN(walmath.WalSegmentSize)))
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assert.Equal(t, uint64(1), walmath.GetSegmentNoFromLsn(walmath.LSN(walmath.WalSegmentSize+1)))
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}
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func Test_WalSegmentNo_Next_AdvancesByOne(t *testing.T) {
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assert.Equal(t, walmath.WalSegmentNo(6), walmath.WalSegmentNo(5).Next())
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assert.Equal(t, walmath.WalSegmentNo(1), walmath.WalSegmentNo(0).Next())
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}
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func Test_WalSegmentNo_Previous_DecrementsByOne(t *testing.T) {
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assert.Equal(t, walmath.WalSegmentNo(4), walmath.WalSegmentNo(5).Previous())
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assert.Equal(t, walmath.WalSegmentNo(0), walmath.WalSegmentNo(1).Previous())
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}
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func Test_WalSegmentNo_FirstLSN_FromSegnoZero_ReturnsZero(t *testing.T) {
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assert.Equal(t, walmath.LSN(0), walmath.WalSegmentNo(0).FirstLSN())
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}
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func Test_WalSegmentNo_FirstLSN_FromSegnoN_ReturnsNxSegmentSize(t *testing.T) {
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assert.Equal(t, walmath.LSN(walmath.WalSegmentSize), walmath.WalSegmentNo(1).FirstLSN())
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assert.Equal(t, walmath.LSN(walmath.WalSegmentSize*42), walmath.WalSegmentNo(42).FirstLSN())
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}
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func Test_WalSegmentNo_GetFilename_KnownTimelineAndSegno_MatchesPgFormat(t *testing.T) {
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assert.Equal(t, "000000010000000000000042", walmath.WalSegmentNo(0x42).GetFilename(1))
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assert.Equal(t, "00000007000000000000002A", walmath.WalSegmentNo(0x2A).GetFilename(7))
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assert.Equal(t, "000000010000000100000001", walmath.WalSegmentNo(0x101).GetFilename(1))
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}
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func Test_NewWalSegmentDescription_FromValidName_RoundtripsToFilename(t *testing.T) {
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desc, err := walmath.NewWalSegmentDescription("000000010000000100000001")
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assert.NoError(t, err)
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assert.Equal(t, "000000010000000100000001", desc.GetFileName())
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assert.Equal(t, uint32(1), desc.Timeline)
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}
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func Test_NewWalSegmentDescription_FromInvalidName_ReturnsError(t *testing.T) {
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_, err := walmath.NewWalSegmentDescription("not-a-wal-name")
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assert.Error(t, err)
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}
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