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seaweedfs/weed/filer/filechunks_test.go
Chris Lu d4566d4aaa
more solid weed mount (#4089)
* compare chunks by timestamp

* fix slab clearing error

* fix test compilation

* move oldest chunk to sealed, instead of by fullness

* lock on fh.entryViewCache

* remove verbose logs

* revert slat clearing

* less logs

* less logs

* track write and read by timestamp

* remove useless logic

* add entry lock on file handle release

* use mem chunk only, swap file chunk has problems

* comment out code that maybe used later

* add debug mode to compare data read and write

* more efficient readResolvedChunks with linked list

* small optimization

* fix test compilation

* minor fix on writer

* add SeparateGarbageChunks

* group chunks into sections

* turn off debug mode

* fix tests

* fix tests

* tmp enable swap file chunk

* Revert "tmp enable swap file chunk"

This reverts commit 985137ec47.

* simple refactoring

* simple refactoring

* do not re-use swap file chunk. Sealed chunks should not be re-used.

* comment out debugging facilities

* either mem chunk or swap file chunk is fine now

* remove orderedMutex  as *semaphore.Weighted

not found impactful

* optimize size calculation for changing large files

* optimize performance to avoid going through the long list of chunks

* still problems with swap file chunk

* rename

* tiny optimization

* swap file chunk save only successfully read data

* fix

* enable both mem and swap file chunk

* resolve chunks with range

* rename

* fix chunk interval list

* also change file handle chunk group when adding chunks

* pick in-active chunk with time-decayed counter

* fix compilation

* avoid nil with empty fh.entry

* refactoring

* rename

* rename

* refactor visible intervals to *list.List

* refactor chunkViews to *list.List

* add IntervalList for generic interval list

* change visible interval to use IntervalList in generics

* cahnge chunkViews to *IntervalList[*ChunkView]

* use NewFileChunkSection to create

* rename variables

* refactor

* fix renaming leftover

* renaming

* renaming

* add insert interval

* interval list adds lock

* incrementally add chunks to readers

Fixes:
1. set start and stop offset for the value object
2. clone the value object
3. use pointer instead of copy-by-value when passing to interval.Value
4. use insert interval since adding chunk could be out of order

* fix tests compilation

* fix tests compilation
2023-01-02 23:20:45 -08:00

556 lines
18 KiB
Go

package filer
import (
"fmt"
"log"
"math"
"math/rand"
"strconv"
"testing"
"github.com/stretchr/testify/assert"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
)
func TestCompactFileChunks(t *testing.T) {
chunks := []*filer_pb.FileChunk{
{Offset: 10, Size: 100, FileId: "abc", ModifiedTsNs: 50},
{Offset: 100, Size: 100, FileId: "def", ModifiedTsNs: 100},
{Offset: 200, Size: 100, FileId: "ghi", ModifiedTsNs: 200},
{Offset: 110, Size: 200, FileId: "jkl", ModifiedTsNs: 300},
}
compacted, garbage := CompactFileChunks(nil, chunks)
if len(compacted) != 3 {
t.Fatalf("unexpected compacted: %d", len(compacted))
}
if len(garbage) != 1 {
t.Fatalf("unexpected garbage: %d", len(garbage))
}
}
func TestCompactFileChunks2(t *testing.T) {
chunks := []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "abc", ModifiedTsNs: 50},
{Offset: 100, Size: 100, FileId: "def", ModifiedTsNs: 100},
{Offset: 200, Size: 100, FileId: "ghi", ModifiedTsNs: 200},
{Offset: 0, Size: 100, FileId: "abcf", ModifiedTsNs: 300},
{Offset: 50, Size: 100, FileId: "fhfh", ModifiedTsNs: 400},
{Offset: 100, Size: 100, FileId: "yuyu", ModifiedTsNs: 500},
}
k := 3
for n := 0; n < k; n++ {
chunks = append(chunks, &filer_pb.FileChunk{
Offset: int64(n * 100), Size: 100, FileId: fmt.Sprintf("fileId%d", n), ModifiedTsNs: int64(n),
})
chunks = append(chunks, &filer_pb.FileChunk{
Offset: int64(n * 50), Size: 100, FileId: fmt.Sprintf("fileId%d", n+k), ModifiedTsNs: int64(n + k),
})
}
compacted, garbage := CompactFileChunks(nil, chunks)
if len(compacted) != 4 {
t.Fatalf("unexpected compacted: %d", len(compacted))
}
if len(garbage) != 8 {
t.Fatalf("unexpected garbage: %d", len(garbage))
}
}
func TestRandomFileChunksCompact(t *testing.T) {
data := make([]byte, 1024)
var chunks []*filer_pb.FileChunk
for i := 0; i < 15; i++ {
start, stop := rand.Intn(len(data)), rand.Intn(len(data))
if start > stop {
start, stop = stop, start
}
if start+16 < stop {
stop = start + 16
}
chunk := &filer_pb.FileChunk{
FileId: strconv.Itoa(i),
Offset: int64(start),
Size: uint64(stop - start),
ModifiedTsNs: int64(i),
Fid: &filer_pb.FileId{FileKey: uint64(i)},
}
chunks = append(chunks, chunk)
for x := start; x < stop; x++ {
data[x] = byte(i)
}
}
visibles, _ := NonOverlappingVisibleIntervals(nil, chunks, 0, math.MaxInt64)
for visible := visibles.Front(); visible != nil; visible = visible.Next {
v := visible.Value
for x := v.start; x < v.stop; x++ {
assert.Equal(t, strconv.Itoa(int(data[x])), v.fileId)
}
}
}
func TestIntervalMerging(t *testing.T) {
testcases := []struct {
Chunks []*filer_pb.FileChunk
Expected []*VisibleInterval
}{
// case 0: normal
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "abc", ModifiedTsNs: 123},
{Offset: 100, Size: 100, FileId: "asdf", ModifiedTsNs: 134},
{Offset: 200, Size: 100, FileId: "fsad", ModifiedTsNs: 353},
},
Expected: []*VisibleInterval{
{start: 0, stop: 100, fileId: "abc"},
{start: 100, stop: 200, fileId: "asdf"},
{start: 200, stop: 300, fileId: "fsad"},
},
},
// case 1: updates overwrite full chunks
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "abc", ModifiedTsNs: 123},
{Offset: 0, Size: 200, FileId: "asdf", ModifiedTsNs: 134},
},
Expected: []*VisibleInterval{
{start: 0, stop: 200, fileId: "asdf"},
},
},
// case 2: updates overwrite part of previous chunks
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "a", ModifiedTsNs: 123},
{Offset: 0, Size: 70, FileId: "b", ModifiedTsNs: 134},
},
Expected: []*VisibleInterval{
{start: 0, stop: 70, fileId: "b"},
{start: 70, stop: 100, fileId: "a", offsetInChunk: 70},
},
},
// case 3: updates overwrite full chunks
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "abc", ModifiedTsNs: 123},
{Offset: 0, Size: 200, FileId: "asdf", ModifiedTsNs: 134},
{Offset: 50, Size: 250, FileId: "xxxx", ModifiedTsNs: 154},
},
Expected: []*VisibleInterval{
{start: 0, stop: 50, fileId: "asdf"},
{start: 50, stop: 300, fileId: "xxxx"},
},
},
// case 4: updates far away from prev chunks
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "abc", ModifiedTsNs: 123},
{Offset: 0, Size: 200, FileId: "asdf", ModifiedTsNs: 134},
{Offset: 250, Size: 250, FileId: "xxxx", ModifiedTsNs: 154},
},
Expected: []*VisibleInterval{
{start: 0, stop: 200, fileId: "asdf"},
{start: 250, stop: 500, fileId: "xxxx"},
},
},
// case 5: updates overwrite full chunks
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "a", ModifiedTsNs: 123},
{Offset: 0, Size: 200, FileId: "d", ModifiedTsNs: 184},
{Offset: 70, Size: 150, FileId: "c", ModifiedTsNs: 143},
{Offset: 80, Size: 100, FileId: "b", ModifiedTsNs: 134},
},
Expected: []*VisibleInterval{
{start: 0, stop: 200, fileId: "d"},
{start: 200, stop: 220, fileId: "c", offsetInChunk: 130},
},
},
// case 6: same updates
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "abc", Fid: &filer_pb.FileId{FileKey: 1}, ModifiedTsNs: 123},
{Offset: 0, Size: 100, FileId: "axf", Fid: &filer_pb.FileId{FileKey: 2}, ModifiedTsNs: 124},
{Offset: 0, Size: 100, FileId: "xyz", Fid: &filer_pb.FileId{FileKey: 3}, ModifiedTsNs: 125},
},
Expected: []*VisibleInterval{
{start: 0, stop: 100, fileId: "xyz"},
},
},
// case 7: real updates
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 2097152, FileId: "7,0294cbb9892b", ModifiedTsNs: 123},
{Offset: 0, Size: 3145728, FileId: "3,029565bf3092", ModifiedTsNs: 130},
{Offset: 2097152, Size: 3145728, FileId: "6,029632f47ae2", ModifiedTsNs: 140},
{Offset: 5242880, Size: 3145728, FileId: "2,029734c5aa10", ModifiedTsNs: 150},
{Offset: 8388608, Size: 3145728, FileId: "5,02982f80de50", ModifiedTsNs: 160},
{Offset: 11534336, Size: 2842193, FileId: "7,0299ad723803", ModifiedTsNs: 170},
},
Expected: []*VisibleInterval{
{start: 0, stop: 2097152, fileId: "3,029565bf3092"},
{start: 2097152, stop: 5242880, fileId: "6,029632f47ae2"},
{start: 5242880, stop: 8388608, fileId: "2,029734c5aa10"},
{start: 8388608, stop: 11534336, fileId: "5,02982f80de50"},
{start: 11534336, stop: 14376529, fileId: "7,0299ad723803"},
},
},
// case 8: real bug
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 77824, FileId: "4,0b3df938e301", ModifiedTsNs: 123},
{Offset: 471040, Size: 472225 - 471040, FileId: "6,0b3e0650019c", ModifiedTsNs: 130},
{Offset: 77824, Size: 208896 - 77824, FileId: "4,0b3f0c7202f0", ModifiedTsNs: 140},
{Offset: 208896, Size: 339968 - 208896, FileId: "2,0b4031a72689", ModifiedTsNs: 150},
{Offset: 339968, Size: 471040 - 339968, FileId: "3,0b416a557362", ModifiedTsNs: 160},
},
Expected: []*VisibleInterval{
{start: 0, stop: 77824, fileId: "4,0b3df938e301"},
{start: 77824, stop: 208896, fileId: "4,0b3f0c7202f0"},
{start: 208896, stop: 339968, fileId: "2,0b4031a72689"},
{start: 339968, stop: 471040, fileId: "3,0b416a557362"},
{start: 471040, stop: 472225, fileId: "6,0b3e0650019c"},
},
},
}
for i, testcase := range testcases {
log.Printf("++++++++++ merged test case %d ++++++++++++++++++++", i)
intervals, _ := NonOverlappingVisibleIntervals(nil, testcase.Chunks, 0, math.MaxInt64)
x := -1
for visible := intervals.Front(); visible != nil; visible = visible.Next {
x++
interval := visible.Value
log.Printf("test case %d, interval start=%d, stop=%d, fileId=%s",
i, interval.start, interval.stop, interval.fileId)
}
x = -1
for visible := intervals.Front(); visible != nil; visible = visible.Next {
x++
interval := visible.Value
if interval.start != testcase.Expected[x].start {
t.Fatalf("failed on test case %d, interval %d, start %d, expect %d",
i, x, interval.start, testcase.Expected[x].start)
}
if interval.stop != testcase.Expected[x].stop {
t.Fatalf("failed on test case %d, interval %d, stop %d, expect %d",
i, x, interval.stop, testcase.Expected[x].stop)
}
if interval.fileId != testcase.Expected[x].fileId {
t.Fatalf("failed on test case %d, interval %d, chunkId %s, expect %s",
i, x, interval.fileId, testcase.Expected[x].fileId)
}
if interval.offsetInChunk != testcase.Expected[x].offsetInChunk {
t.Fatalf("failed on test case %d, interval %d, offsetInChunk %d, expect %d",
i, x, interval.offsetInChunk, testcase.Expected[x].offsetInChunk)
}
}
if intervals.Len() != len(testcase.Expected) {
t.Fatalf("failed to compact test case %d, len %d expected %d", i, intervals.Len(), len(testcase.Expected))
}
}
}
func TestChunksReading(t *testing.T) {
testcases := []struct {
Chunks []*filer_pb.FileChunk
Offset int64
Size int64
Expected []*ChunkView
}{
// case 0: normal
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "abc", ModifiedTsNs: 123},
{Offset: 100, Size: 100, FileId: "asdf", ModifiedTsNs: 134},
{Offset: 200, Size: 100, FileId: "fsad", ModifiedTsNs: 353},
},
Offset: 0,
Size: 250,
Expected: []*ChunkView{
{OffsetInChunk: 0, ViewSize: 100, FileId: "abc", ViewOffset: 0},
{OffsetInChunk: 0, ViewSize: 100, FileId: "asdf", ViewOffset: 100},
{OffsetInChunk: 0, ViewSize: 50, FileId: "fsad", ViewOffset: 200},
},
},
// case 1: updates overwrite full chunks
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "abc", ModifiedTsNs: 123},
{Offset: 0, Size: 200, FileId: "asdf", ModifiedTsNs: 134},
},
Offset: 50,
Size: 100,
Expected: []*ChunkView{
{OffsetInChunk: 50, ViewSize: 100, FileId: "asdf", ViewOffset: 50},
},
},
// case 2: updates overwrite part of previous chunks
{
Chunks: []*filer_pb.FileChunk{
{Offset: 3, Size: 100, FileId: "a", ModifiedTsNs: 123},
{Offset: 10, Size: 50, FileId: "b", ModifiedTsNs: 134},
},
Offset: 30,
Size: 40,
Expected: []*ChunkView{
{OffsetInChunk: 20, ViewSize: 30, FileId: "b", ViewOffset: 30},
{OffsetInChunk: 57, ViewSize: 10, FileId: "a", ViewOffset: 60},
},
},
// case 3: updates overwrite full chunks
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "abc", ModifiedTsNs: 123},
{Offset: 0, Size: 200, FileId: "asdf", ModifiedTsNs: 134},
{Offset: 50, Size: 250, FileId: "xxxx", ModifiedTsNs: 154},
},
Offset: 0,
Size: 200,
Expected: []*ChunkView{
{OffsetInChunk: 0, ViewSize: 50, FileId: "asdf", ViewOffset: 0},
{OffsetInChunk: 0, ViewSize: 150, FileId: "xxxx", ViewOffset: 50},
},
},
// case 4: updates far away from prev chunks
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "abc", ModifiedTsNs: 123},
{Offset: 0, Size: 200, FileId: "asdf", ModifiedTsNs: 134},
{Offset: 250, Size: 250, FileId: "xxxx", ModifiedTsNs: 154},
},
Offset: 0,
Size: 400,
Expected: []*ChunkView{
{OffsetInChunk: 0, ViewSize: 200, FileId: "asdf", ViewOffset: 0},
{OffsetInChunk: 0, ViewSize: 150, FileId: "xxxx", ViewOffset: 250},
},
},
// case 5: updates overwrite full chunks
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "a", ModifiedTsNs: 123},
{Offset: 0, Size: 200, FileId: "c", ModifiedTsNs: 184},
{Offset: 70, Size: 150, FileId: "b", ModifiedTsNs: 143},
{Offset: 80, Size: 100, FileId: "xxxx", ModifiedTsNs: 134},
},
Offset: 0,
Size: 220,
Expected: []*ChunkView{
{OffsetInChunk: 0, ViewSize: 200, FileId: "c", ViewOffset: 0},
{OffsetInChunk: 130, ViewSize: 20, FileId: "b", ViewOffset: 200},
},
},
// case 6: same updates
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "abc", Fid: &filer_pb.FileId{FileKey: 1}, ModifiedTsNs: 123},
{Offset: 0, Size: 100, FileId: "def", Fid: &filer_pb.FileId{FileKey: 2}, ModifiedTsNs: 124},
{Offset: 0, Size: 100, FileId: "xyz", Fid: &filer_pb.FileId{FileKey: 3}, ModifiedTsNs: 125},
},
Offset: 0,
Size: 100,
Expected: []*ChunkView{
{OffsetInChunk: 0, ViewSize: 100, FileId: "xyz", ViewOffset: 0},
},
},
// case 7: edge cases
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "abc", ModifiedTsNs: 123},
{Offset: 100, Size: 100, FileId: "asdf", ModifiedTsNs: 134},
{Offset: 200, Size: 100, FileId: "fsad", ModifiedTsNs: 353},
},
Offset: 0,
Size: 200,
Expected: []*ChunkView{
{OffsetInChunk: 0, ViewSize: 100, FileId: "abc", ViewOffset: 0},
{OffsetInChunk: 0, ViewSize: 100, FileId: "asdf", ViewOffset: 100},
},
},
// case 8: edge cases
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 100, FileId: "abc", ModifiedTsNs: 123},
{Offset: 90, Size: 200, FileId: "asdf", ModifiedTsNs: 134},
{Offset: 190, Size: 300, FileId: "fsad", ModifiedTsNs: 353},
},
Offset: 0,
Size: 300,
Expected: []*ChunkView{
{OffsetInChunk: 0, ViewSize: 90, FileId: "abc", ViewOffset: 0},
{OffsetInChunk: 0, ViewSize: 100, FileId: "asdf", ViewOffset: 90},
{OffsetInChunk: 0, ViewSize: 110, FileId: "fsad", ViewOffset: 190},
},
},
// case 9: edge cases
{
Chunks: []*filer_pb.FileChunk{
{Offset: 0, Size: 43175947, FileId: "2,111fc2cbfac1", ModifiedTsNs: 1},
{Offset: 43175936, Size: 52981771 - 43175936, FileId: "2,112a36ea7f85", ModifiedTsNs: 2},
{Offset: 52981760, Size: 72564747 - 52981760, FileId: "4,112d5f31c5e7", ModifiedTsNs: 3},
{Offset: 72564736, Size: 133255179 - 72564736, FileId: "1,113245f0cdb6", ModifiedTsNs: 4},
{Offset: 133255168, Size: 137269259 - 133255168, FileId: "3,1141a70733b5", ModifiedTsNs: 5},
{Offset: 137269248, Size: 153578836 - 137269248, FileId: "1,114201d5bbdb", ModifiedTsNs: 6},
},
Offset: 0,
Size: 153578836,
Expected: []*ChunkView{
{OffsetInChunk: 0, ViewSize: 43175936, FileId: "2,111fc2cbfac1", ViewOffset: 0},
{OffsetInChunk: 0, ViewSize: 52981760 - 43175936, FileId: "2,112a36ea7f85", ViewOffset: 43175936},
{OffsetInChunk: 0, ViewSize: 72564736 - 52981760, FileId: "4,112d5f31c5e7", ViewOffset: 52981760},
{OffsetInChunk: 0, ViewSize: 133255168 - 72564736, FileId: "1,113245f0cdb6", ViewOffset: 72564736},
{OffsetInChunk: 0, ViewSize: 137269248 - 133255168, FileId: "3,1141a70733b5", ViewOffset: 133255168},
{OffsetInChunk: 0, ViewSize: 153578836 - 137269248, FileId: "1,114201d5bbdb", ViewOffset: 137269248},
},
},
}
for i, testcase := range testcases {
if i != 2 {
// continue
}
log.Printf("++++++++++ read test case %d ++++++++++++++++++++", i)
chunks := ViewFromChunks(nil, testcase.Chunks, testcase.Offset, testcase.Size)
x := -1
for c := chunks.Front(); c != nil; c = c.Next {
x++
chunk := c.Value
log.Printf("read case %d, chunk %d, offset=%d, size=%d, fileId=%s",
i, x, chunk.OffsetInChunk, chunk.ViewSize, chunk.FileId)
if chunk.OffsetInChunk != testcase.Expected[x].OffsetInChunk {
t.Fatalf("failed on read case %d, chunk %s, Offset %d, expect %d",
i, chunk.FileId, chunk.OffsetInChunk, testcase.Expected[x].OffsetInChunk)
}
if chunk.ViewSize != testcase.Expected[x].ViewSize {
t.Fatalf("failed on read case %d, chunk %s, ViewSize %d, expect %d",
i, chunk.FileId, chunk.ViewSize, testcase.Expected[x].ViewSize)
}
if chunk.FileId != testcase.Expected[x].FileId {
t.Fatalf("failed on read case %d, chunk %d, FileId %s, expect %s",
i, x, chunk.FileId, testcase.Expected[x].FileId)
}
if chunk.ViewOffset != testcase.Expected[x].ViewOffset {
t.Fatalf("failed on read case %d, chunk %d, ViewOffset %d, expect %d",
i, x, chunk.ViewOffset, testcase.Expected[x].ViewOffset)
}
}
if chunks.Len() != len(testcase.Expected) {
t.Fatalf("failed to read test case %d, len %d expected %d", i, chunks.Len(), len(testcase.Expected))
}
}
}
func BenchmarkCompactFileChunks(b *testing.B) {
var chunks []*filer_pb.FileChunk
k := 1024
for n := 0; n < k; n++ {
chunks = append(chunks, &filer_pb.FileChunk{
Offset: int64(n * 100), Size: 100, FileId: fmt.Sprintf("fileId%d", n), ModifiedTsNs: int64(n),
})
chunks = append(chunks, &filer_pb.FileChunk{
Offset: int64(n * 50), Size: 100, FileId: fmt.Sprintf("fileId%d", n+k), ModifiedTsNs: int64(n + k),
})
}
for n := 0; n < b.N; n++ {
CompactFileChunks(nil, chunks)
}
}
func addVisibleInterval(visibles *IntervalList[*VisibleInterval], x *VisibleInterval) {
visibles.AppendInterval(&Interval[*VisibleInterval]{
StartOffset: x.start,
StopOffset: x.stop,
TsNs: x.modifiedTsNs,
Value: x,
})
}
func TestViewFromVisibleIntervals(t *testing.T) {
visibles := NewIntervalList[*VisibleInterval]()
addVisibleInterval(visibles, &VisibleInterval{
start: 0,
stop: 25,
fileId: "fid1",
})
addVisibleInterval(visibles, &VisibleInterval{
start: 4096,
stop: 8192,
fileId: "fid2",
})
addVisibleInterval(visibles, &VisibleInterval{
start: 16384,
stop: 18551,
fileId: "fid3",
})
views := ViewFromVisibleIntervals(visibles, 0, math.MaxInt32)
if views.Len() != visibles.Len() {
assert.Equal(t, visibles.Len(), views.Len(), "ViewFromVisibleIntervals error")
}
}
func TestViewFromVisibleIntervals2(t *testing.T) {
visibles := NewIntervalList[*VisibleInterval]()
addVisibleInterval(visibles, &VisibleInterval{
start: 344064,
stop: 348160,
fileId: "fid1",
})
addVisibleInterval(visibles, &VisibleInterval{
start: 348160,
stop: 356352,
fileId: "fid2",
})
views := ViewFromVisibleIntervals(visibles, 0, math.MaxInt32)
if views.Len() != visibles.Len() {
assert.Equal(t, visibles.Len(), views.Len(), "ViewFromVisibleIntervals error")
}
}
func TestViewFromVisibleIntervals3(t *testing.T) {
visibles := NewIntervalList[*VisibleInterval]()
addVisibleInterval(visibles, &VisibleInterval{
start: 1000,
stop: 2000,
fileId: "fid1",
})
addVisibleInterval(visibles, &VisibleInterval{
start: 3000,
stop: 4000,
fileId: "fid2",
})
views := ViewFromVisibleIntervals(visibles, 1700, 1500)
if views.Len() != visibles.Len() {
assert.Equal(t, visibles.Len(), views.Len(), "ViewFromVisibleIntervals error")
}
}