89 lines
2.8 KiB
Go
89 lines
2.8 KiB
Go
package dbhash_test
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import (
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"encoding/hex"
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"fmt"
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"testing"
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"github.com/rclone/rclone/backend/dropbox/dbhash"
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"github.com/stretchr/testify/assert"
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)
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func testChunk(t *testing.T, chunk int) {
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data := make([]byte, chunk)
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for i := 0; i < chunk; i++ {
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data[i] = 'A'
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}
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for _, test := range []struct {
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n int
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want string
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}{
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{0, "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"},
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{1, "1cd6ef71e6e0ff46ad2609d403dc3fee244417089aa4461245a4e4fe23a55e42"},
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{2, "01e0655fb754d10418a73760f57515f4903b298e6d67dda6bf0987fa79c22c88"},
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{4096, "8620913d33852befe09f16fff8fd75f77a83160d29f76f07e0276e9690903035"},
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{4194303, "647c8627d70f7a7d13ce96b1e7710a771a55d41a62c3da490d92e56044d311fa"},
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{4194304, "d4d63bac5b866c71620185392a8a6218ac1092454a2d16f820363b69852befa3"},
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{4194305, "8f553da8d00d0bf509d8470e242888be33019c20c0544811f5b2b89e98360b92"},
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{8388607, "83b30cf4fb5195b04a937727ae379cf3d06673bf8f77947f6a92858536e8369c"},
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{8388608, "e08b3ba1f538804075c5f939accdeaa9efc7b5c01865c94a41e78ca6550a88e7"},
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{8388609, "02c8a4aefc2bfc9036f89a7098001865885938ca580e5c9e5db672385edd303c"},
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} {
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d := dbhash.New()
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var toWrite int
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for toWrite = test.n; toWrite >= chunk; toWrite -= chunk {
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n, err := d.Write(data)
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assert.Nil(t, err)
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assert.Equal(t, chunk, n)
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}
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n, err := d.Write(data[:toWrite])
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assert.Nil(t, err)
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assert.Equal(t, toWrite, n)
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got := hex.EncodeToString(d.Sum(nil))
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assert.Equal(t, test.want, got, fmt.Sprintf("when testing length %d", n))
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}
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}
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func TestHashChunk16M(t *testing.T) { testChunk(t, 16*1024*1024) }
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func TestHashChunk8M(t *testing.T) { testChunk(t, 8*1024*1024) }
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func TestHashChunk4M(t *testing.T) { testChunk(t, 4*1024*1024) }
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func TestHashChunk2M(t *testing.T) { testChunk(t, 2*1024*1024) }
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func TestHashChunk1M(t *testing.T) { testChunk(t, 1*1024*1024) }
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func TestHashChunk64k(t *testing.T) { testChunk(t, 64*1024) }
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func TestHashChunk32k(t *testing.T) { testChunk(t, 32*1024) }
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func TestHashChunk2048(t *testing.T) { testChunk(t, 2048) }
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func TestHashChunk2047(t *testing.T) { testChunk(t, 2047) }
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func TestSumCalledTwice(t *testing.T) {
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d := dbhash.New()
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assert.NotPanics(t, func() { d.Sum(nil) })
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d.Reset()
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assert.NotPanics(t, func() { d.Sum(nil) })
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assert.NotPanics(t, func() { d.Sum(nil) })
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_, _ = d.Write([]byte{1})
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assert.Panics(t, func() { d.Sum(nil) })
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}
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func TestSize(t *testing.T) {
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d := dbhash.New()
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assert.Equal(t, 32, d.Size())
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}
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func TestBlockSize(t *testing.T) {
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d := dbhash.New()
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assert.Equal(t, 64, d.BlockSize())
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}
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func TestSum(t *testing.T) {
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assert.Equal(t,
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[64]byte{
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0x1c, 0xd6, 0xef, 0x71, 0xe6, 0xe0, 0xff, 0x46,
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0xad, 0x26, 0x09, 0xd4, 0x03, 0xdc, 0x3f, 0xee,
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0x24, 0x44, 0x17, 0x08, 0x9a, 0xa4, 0x46, 0x12,
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0x45, 0xa4, 0xe4, 0xfe, 0x23, 0xa5, 0x5e, 0x42,
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},
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dbhash.Sum([]byte{'A'}),
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)
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}
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