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89 lines
1.9 KiB
89 lines
1.9 KiB
package filesys
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import (
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"bytes"
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"testing"
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)
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func TestContinuousIntervals_AddIntervalAppend(t *testing.T) {
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c := &ContinuousIntervals{}
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// 25, 25, 25
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c.AddInterval(getBytes(25, 3), 0)
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// _, _, 23, 23, 23, 23
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c.AddInterval(getBytes(23, 4), 2)
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expectedData(t, c, 0, 25, 25, 23, 23, 23, 23)
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}
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func TestContinuousIntervals_AddIntervalInnerOverwrite(t *testing.T) {
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c := &ContinuousIntervals{}
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// 25, 25, 25, 25, 25
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c.AddInterval(getBytes(25, 5), 0)
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// _, _, 23, 23
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c.AddInterval(getBytes(23, 2), 2)
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expectedData(t, c, 0, 25, 25, 23, 23, 25)
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}
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func TestContinuousIntervals_AddIntervalFullOverwrite(t *testing.T) {
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c := &ContinuousIntervals{}
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// 1,
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c.AddInterval(getBytes(1, 1), 0)
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// _, 2,
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c.AddInterval(getBytes(2, 1), 1)
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// _, _, 3, 3, 3
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c.AddInterval(getBytes(3, 3), 2)
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// _, _, _, 4, 4, 4
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c.AddInterval(getBytes(4, 3), 3)
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expectedData(t, c, 0, 1, 2, 3, 4, 4, 4)
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}
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func TestContinuousIntervals_RealCase1(t *testing.T) {
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c := &ContinuousIntervals{}
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// 25,
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c.AddInterval(getBytes(25, 1), 0)
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// _, _, _, _, 23, 23
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c.AddInterval(getBytes(23, 2), 4)
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// _, _, _, 24, 24, 24, 24
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c.AddInterval(getBytes(24, 4), 3)
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// _, 22, 22
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c.AddInterval(getBytes(22, 2), 1)
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expectedData(t, c, 0, 25, 22, 22, 24, 24, 24, 24)
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}
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func expectedData(t *testing.T, c *ContinuousIntervals, offset int, data ...byte) {
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start, stop := int64(offset), int64(offset+len(data))
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for _, list := range c.lists {
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nodeStart, nodeStop := max(start, list.Head.Offset), min(stop, list.Head.Offset+list.Size())
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if nodeStart < nodeStop {
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buf := make([]byte, nodeStop-nodeStart)
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list.ReadData(buf, nodeStart, nodeStop)
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if bytes.Compare(buf, data[nodeStart-start:nodeStop-start]) != 0 {
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t.Errorf("expected %v actual %v", data[nodeStart-start:nodeStop-start], buf)
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}
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}
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}
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}
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func getBytes(content byte, length int) []byte {
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data := make([]byte, length)
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for i := 0; i < length; i++ {
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data[i] = content
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}
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return data
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}
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