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compact: Verify for chunks outside of compacted time range. Added unit test for populateBlocs. #349

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bwplotka
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@bwplotka bwplotka commented Jun 13, 2018

Rationales:

  • No "outside" chunks should happen.
  • No clear view what happens for various compact input.

NOTE: This PR should be merged after: #348

Signed-off-by: Bartek Plotka bwplotka@gmail.com

@krasi-georgiev
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why not open the PR against his branch BenoitKnecht:fix-block-boundaries so he can merge and both will get in at the same time.

@bwplotka
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Sure I am ok with it as long as we decide what to do in @BenoitKnecht PR (:

@krasi-georgiev
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time for a rebase and a review :)

@krasi-georgiev
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ping @bwplotka

…t test for populateBlocs.

Signed-off-by: Bartek Plotka <bwplotka@gmail.com>
@bwplotka bwplotka force-pushed the issue347-extra-chunk-compaction branch from 52c79b2 to ea2a31b Compare September 21, 2018 19:33
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Just few small suggestions, but overall very easy to follow and very good tests to have,
Thanks Bartek!

compact_test.go Outdated
@@ -401,3 +405,333 @@ type erringBReader struct{}
func (erringBReader) Index() (IndexReader, error) { return nil, errors.New("index") }
func (erringBReader) Chunks() (ChunkReader, error) { return nil, errors.New("chunks") }
func (erringBReader) Tombstones() (TombstoneReader, error) { return nil, errors.New("tombstones") }

type mockedBReader struct {
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lets call this just mockBReader , the same for mockIndexWriter

And lets put these in the corresponding files: mockBReader in block_test.go and mockIndexWriter in index_test.go

to make it easier to find when looking for mocks when writing new tests.

compact_test.go Outdated
func (nopChunkWriter) WriteChunks(chunks ...chunks.Meta) error { return nil }
func (nopChunkWriter) Close() error { return nil }

var populateBlocksCases = []struct {
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why isn't this inside the TestCompaction_populateBlock defitnition?

compact_test.go Outdated
func (nopChunkWriter) Close() error { return nil }

var populateBlocksCases = []struct {
inputBlocks [][]seriesSamples
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@krasi-georgiev krasi-georgiev Sep 28, 2018

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if this is a slice of seriesSamples why is it called inputBlocks ? later on it is used to created the chunk and index reader so maybe call it inputSeriesSamples or blockInput

the same for expectedBlock - expectedSeriesSamples or expectedBlockOutput

compact_test.go Outdated
var populateBlocksCases = []struct {
inputBlocks [][]seriesSamples
compactMinTime int64
compactMaxTime int64 // by default it is math.MaxInt64
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🤖 golang robot : Capital letter and full stop.

btw I had to look down the code to understand what is that comment for so maybe change it to:

// When not defined the test runner sets a default of math.MaxInt64.

compact_test.go Outdated
expectedErr error
}{
{
// Populate block from empty input should return error.
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instead of comments why not add as a title?
Title: "Populate block from empty input should return error."
and than use it in t.Run(test.Title, this way if it fails it will also show the title of the test case that failed

compact_test.go Outdated
},
compactMinTime: 0,
compactMaxTime: 20,
expectedErr: errors.New("found chunk with minTime: 10 maxTime: 30 outside of compacted minTime: 0 maxTime: 20"),
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might be an overkill, but instead of error string matching we can define a custom error type and than match it.
expectedErr: tsdb.ErrChunkOutsider
_, ok := err.(tsdb.ErrChunkOutsider) or match the type directly

compact_test.go Outdated
chunks: [][]sample{{{t: 1}, {t: 9}}, {{t: 10}, {t: 19}}},
},
{
// no-chunk series should be dropped.
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// Series without chunks should be dropped.

compact_test.go Outdated
inputBlocks: [][]seriesSamples{
{
{
lset: map[string]string{"a": "issue347"},
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issue347 nice touch 😄 !

@krasi-georgiev
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@bwplotka gentle reminder 😜

@bwplotka
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bwplotka commented Oct 8, 2018

Yup, sorry, bit overloaded, will try to address it soon (current ETA is tomorrow)

Krasi Georgiev and others added 2 commits October 12, 2018 12:30
Moved mocks to dedicated file so they can be reused by other tests and
few other small nits.

Signed-off-by: Krasi Georgiev <kgeorgie@redhat.com>
move mocks to dedicated file and some small nits
@bwplotka
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Thanks @krasi-georgiev for helping out!

@krasi-georgiev krasi-georgiev merged commit 047b1b1 into prometheus-junkyard:master Oct 12, 2018
@bwplotka bwplotka deleted the issue347-extra-chunk-compaction branch October 12, 2018 10:05
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