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Test for data race conditions in adapters #1756

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merged 20 commits into from
May 12, 2021
Merged

Test for data race conditions in adapters #1756

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7074f58
Data race test first draft
Mar 17, 2021
cbcc293
Step out real quick
Mar 18, 2021
a4c6c4a
Rollback CopyWithOption
Mar 18, 2021
dde3442
Implemented bid request deep copy function instead of importing library
Mar 25, 2021
8dc32b2
merge recent modifications to adapters/adapterstest/test_json.go
Mar 25, 2021
e81eceb
resolved conflicts
Mar 25, 2021
015fc30
informative comment
Mar 25, 2021
e22ffd7
Merge branch 'master' into sharedMemoryTest
Mar 26, 2021
4ce81b9
resolved openrtb2 merge conflicts
Mar 26, 2021
eb75ee4
Rolled back to use the github.com/jinzhu/copier library
Apr 8, 2021
87d8461
step out real quick
Apr 16, 2021
4e81fcf
Scott's review and deep copy library switch
Apr 29, 2021
77d9a54
updated with latest master and resolved merge conflicts
Apr 29, 2021
e8d3a6a
Added slice assertions
May 5, 2021
6be78a1
Major corrections. Removed the assertNoDataRace functions entirely
May 6, 2021
f96f9e7
Merge branch 'master' into sharedMemoryTest
May 6, 2021
1023f30
go mod tidy-ed
May 6, 2021
5f81f1d
Scott's latest review. Improving error messages and reducing large co…
May 6, 2021
4138379
Merge branch 'master' into sharedMemoryTest
May 11, 2021
d0e5e70
Modified imp shallow copies comment
May 11, 2021
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161 changes: 132 additions & 29 deletions adapters/adapterstest/test_json.go
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Original file line number Diff line number Diff line change
Expand Up @@ -7,8 +7,10 @@ import (
"regexp"
"testing"

"github.com/mohae/deepcopy"
"github.com/mxmCherry/openrtb/v15/openrtb2"
"github.com/prebid/prebid-server/adapters"
"github.com/stretchr/testify/assert"
"github.com/yudai/gojsondiff"
"github.com/yudai/gojsondiff/formatter"

Expand Down Expand Up @@ -107,24 +109,10 @@ func runSpec(t *testing.T, filename string, spec *testSpec, bidder adapters.Bidd
} else if isVideoTest {
reqInfo.PbsEntryPoint = "video"
}
actualReqs, errs := bidder.MakeRequests(&spec.BidRequest, &reqInfo)
diffErrorLists(t, fmt.Sprintf("%s: MakeRequests", filename), errs, spec.MakeRequestErrors)
diffHttpRequestLists(t, filename, actualReqs, spec.HttpCalls)

bidResponses := make([]*adapters.BidderResponse, 0)

var bidsErrs = make([]error, 0, len(spec.MakeBidsErrors))
for i := 0; i < len(actualReqs); i++ {
thisBidResponse, theseErrs := bidder.MakeBids(&spec.BidRequest, spec.HttpCalls[i].Request.ToRequestData(t), spec.HttpCalls[i].Response.ToResponseData(t))
bidsErrs = append(bidsErrs, theseErrs...)
bidResponses = append(bidResponses, thisBidResponse)
}
requests := testMakeRequestsImpl(t, filename, spec, bidder, &reqInfo)

diffErrorLists(t, fmt.Sprintf("%s: MakeBids", filename), bidsErrs, spec.MakeBidsErrors)

for i := 0; i < len(spec.BidResponses); i++ {
diffBidLists(t, filename, bidResponses[i], spec.BidResponses[i].Bids)
}
testMakeBidsImpl(t, filename, spec, bidder, requests)
}

type testSpec struct {
Expand Down Expand Up @@ -194,8 +182,8 @@ type expectedBid struct {
//
// Marshalling the structs and then using a JSON-diff library isn't great either, since

// diffHttpRequests compares the actual http requests to the expected ones.
func diffHttpRequestLists(t *testing.T, filename string, actual []*adapters.RequestData, expected []httpCall) {
// assertMakeRequestsOutput compares the actual http requests to the expected ones.
func assertMakeRequestsOutput(t *testing.T, filename string, actual []*adapters.RequestData, expected []httpCall) {
t.Helper()

if len(expected) != len(actual) {
Expand All @@ -206,7 +194,7 @@ func diffHttpRequestLists(t *testing.T, filename string, actual []*adapters.Requ
}
}

func diffErrorLists(t *testing.T, description string, actual []error, expected []testSpecExpectedError) {
func assertErrorList(t *testing.T, description string, actual []error, expected []testSpecExpectedError) {
t.Helper()

if len(expected) != len(actual) {
Expand All @@ -227,10 +215,10 @@ func diffErrorLists(t *testing.T, description string, actual []error, expected [
}
}

func diffBidLists(t *testing.T, filename string, response *adapters.BidderResponse, expected []expectedBid) {
func assertMakeBidsOutput(t *testing.T, filename string, bidderResponse *adapters.BidderResponse, expected []expectedBid) {
t.Helper()

if (response == nil || len(response.Bids) == 0) != (len(expected) == 0) {
if (bidderResponse == nil || len(bidderResponse.Bids) == 0) != (len(expected) == 0) {
if len(expected) == 0 {
t.Fatalf("%s: expectedBidResponses indicated a nil response, but mockResponses supplied a non-nil response", filename)
}
Expand All @@ -239,17 +227,15 @@ func diffBidLists(t *testing.T, filename string, response *adapters.BidderRespon
}

// Expected nil response - give diffBids something to work with.
if response == nil {
response = new(adapters.BidderResponse)
if bidderResponse == nil {
bidderResponse = new(adapters.BidderResponse)
}

actual := response.Bids

if len(actual) != len(expected) {
t.Fatalf("%s: MakeBids returned wrong bid count. Expected %d, got %d", filename, len(expected), len(actual))
if len(bidderResponse.Bids) != len(expected) {
t.Fatalf("%s: MakeBids returned wrong bid count. Expected %d, got %d", filename, len(expected), len(bidderResponse.Bids))
}
for i := 0; i < len(actual); i++ {
diffBids(t, fmt.Sprintf("%s: typedBid[%d]", filename, i), actual[i], &(expected[i]))
for i := 0; i < len(bidderResponse.Bids); i++ {
diffBids(t, fmt.Sprintf("%s: typedBid[%d]", filename, i), bidderResponse.Bids[i], &(expected[i]))
}
}

Expand Down Expand Up @@ -331,3 +317,120 @@ func diffJson(t *testing.T, description string, actual []byte, expected []byte)
}
}
}

// testMakeRequestsImpl asserts the results of the bidder MakeRequests implementation against the
// expected JSON-defined results and makes sure the adapter's implementations of MakeRequests do
// not incurr in data races
func testMakeRequestsImpl(t *testing.T, filename string, spec *testSpec, bidder adapters.Bidder, reqInfo *adapters.ExtraRequestInfo) []*adapters.RequestData {
t.Helper()

deepBidReqCopy, shallowBidReqCopy := getDataRaceTestCopies(&spec.BidRequest)

// Run MakeRequests
requests, errs := bidder.MakeRequests(&spec.BidRequest, reqInfo)

// Compare MakeRequests actual output versus expected values found in JSON file
assertErrorList(t, fmt.Sprintf("%s: MakeRequests", filename), errs, spec.MakeRequestErrors)
assertMakeRequestsOutput(t, filename, requests, spec.HttpCalls)

// Assert no data races occur using original bidRequest copies of references and values
assertNoDataRace(t, deepBidReqCopy, shallowBidReqCopy, filename)

return requests
}

// getDataRaceTestCopies returns a deep copy and a shallow copy of the original bidRequest that will get
// compared inside assertNoDataRace() to verify no data races occur.
// - The shallow copy is helpful because it provides reference values to shared memory that we don't want
// adapters to modify.
// - The deep copy will help us preserve all the original values, even those of the shared memory fields that
// will remain untouched by the adapter tests so we can compare the real shared memory (that can
// be accessed via the shallow copy) to its original values
func getDataRaceTestCopies(original *openrtb2.BidRequest) (*openrtb2.BidRequest, *openrtb2.BidRequest) {
deepReqCopy := deepcopy.Copy(original).(*openrtb2.BidRequest)

shallowReqCopy := *original
shallowReqCopy.Imp = make([]openrtb2.Imp, 0, len(original.Imp))
for i := 0; i < len(original.Imp); i++ {
shallowImpCopy := original.Imp[i]
shallowReqCopy.Imp = append(shallowReqCopy.Imp, shallowImpCopy)
}

return deepReqCopy, &shallowReqCopy
}

// assertNoDataRace compares the contents of the reference fields found in the original openrtb2.BidRequest such as Site,
// App, Device and so on, to their original shared-memory values to make sure they were not modified and we are not incurring
// in data races. Because some adapters modify the lenght of the []Imp array, we call assertNoImpsDataRace() to assert we are
// data-race free there. This function is necessary because a simple `assert.Equalf()` call would also compare non shared
// memory fields that adapters are free to modify, therefore leading us to false positives in terms of data-race detection.
func assertNoDataRace(t *testing.T, bidRequestBefore *openrtb2.BidRequest, bidRequestAfter *openrtb2.BidRequest, filename string) {
t.Helper()

// Assert reference fields were not modified by bidder adapter MakeRequests implementation
assert.Equal(t, bidRequestBefore.Site, bidRequestAfter.Site, "Data race in BidRequest.Site field in file %s", filename)
assert.Equal(t, bidRequestBefore.App, bidRequestAfter.App, "Data race in BidRequest.App field in file %s", filename)
assert.Equal(t, bidRequestBefore.Device, bidRequestAfter.Device, "Data race in BidRequest.Device field in file %s", filename)
assert.Equal(t, bidRequestBefore.User, bidRequestAfter.User, "Data race in BidRequest.User field in file %s", filename)
assert.Equal(t, bidRequestBefore.Source, bidRequestAfter.Source, "Data race in BidRequest.Source field in file %s", filename)
assert.Equal(t, bidRequestBefore.Regs, bidRequestAfter.Regs, "Data race in BidRequest.Regs field in file %s", filename)

// Assert slice fields were not modified by bidder adapter MakeRequests implementation
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Please add in this comment that the Imp[] slice is purposefully excluded.

assert.Equal(t, bidRequestBefore.WSeat, bidRequestAfter.WSeat, "Data race in BidRequest.[]WSeat array")
assert.Equal(t, bidRequestBefore.BSeat, bidRequestAfter.BSeat, "Data race in BidRequest.[]BSeat array")
assert.Equal(t, bidRequestBefore.Cur, bidRequestAfter.Cur, "Data race in BidRequest.[]Cur array")
assert.Equal(t, bidRequestBefore.WLang, bidRequestAfter.WLang, "Data race in BidRequest.[]WLang array")
assert.Equal(t, bidRequestBefore.BCat, bidRequestAfter.BCat, "Data race in BidRequest.[]BCat array")
assert.Equal(t, bidRequestBefore.BAdv, bidRequestAfter.BAdv, "Data race in BidRequest.[]BAdv array")
assert.Equal(t, bidRequestBefore.BApp, bidRequestAfter.BApp, "Data race in BidRequest.[]BApp array")
assert.Equal(t, bidRequestBefore.Ext, bidRequestAfter.Ext, "Data race in BidRequest.[]Ext array")
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This is a string, not a slice. It's ok for the bidder to modify it since strings in Go are immutable.


// Assert Imps separately
assertNoImpsDataRace(t, bidRequestBefore.Imp, bidRequestAfter.Imp, filename)
}

// assertNoImpsDataRace compares the contents of the reference fields found in the original openrtb2.Imp objects to
// their original values to make sure they were not modified and we are not incurring in data races.
func assertNoImpsDataRace(t *testing.T, impsBefore []openrtb2.Imp, impsAfter []openrtb2.Imp, filename string) {
t.Helper()

if assert.Len(t, impsAfter, len(impsBefore), "Original []Imp array was modified and length is not equal to original after MakeRequests was called. File:%s", filename) {
// Assert no data races occured in individual Imp elements
for i := 0; i < len(impsBefore); i++ {
assert.Equal(t, impsBefore[i].Banner, impsAfter[i].Banner, "Data race in bidRequest.Imp[%d].Banner field. File:%s", i, filename)
assert.Equal(t, impsBefore[i].Video, impsAfter[i].Video, "Data race in bidRequest.Imp[%d].Video field. File:%s", i, filename)
assert.Equal(t, impsBefore[i].Audio, impsAfter[i].Audio, "Data race in bidRequest.Imp[%d].Audio field. File:%s", i, filename)
assert.Equal(t, impsBefore[i].Native, impsAfter[i].Native, "Data race in bidRequest.Imp[%d].Native field. File:%s", i, filename)
assert.Equal(t, impsBefore[i].PMP, impsAfter[i].PMP, "Data race in bidRequest.Imp[%d].PMP field. File:%s", i, filename)
assert.Equal(t, impsBefore[i].Secure, impsAfter[i].Secure, "Data race in bidRequest.Imp[%d].Secure field. File:%s", i, filename)
assert.Equal(t, impsBefore[i].Metric, impsAfter[i].Metric, "Data race in bidRequest.Imp[%d].[]Metric array. File:%s", i)
assert.Equal(t, impsBefore[i].IframeBuster, impsAfter[i].IframeBuster, "Data race in bidRequest.Imp[%d].[]IframeBuster array", i)
}
}
}

// testMakeBidsImpl asserts the results of the bidder MakeBids implementation against the expected JSON-defined results
func testMakeBidsImpl(t *testing.T, filename string, spec *testSpec, bidder adapters.Bidder, makeRequestsOut []*adapters.RequestData) {
t.Helper()

bidResponses := make([]*adapters.BidderResponse, 0)
var bidsErrs = make([]error, 0, len(spec.MakeBidsErrors))

// We should have as many bids as number of adapters.RequestData found in MakeRequests output
for i := 0; i < len(makeRequestsOut); i++ {
// Run MakeBids with JSON refined spec.HttpCalls info that was asserted to match MakeRequests
// output inside testMakeRequestsImpl
thisBidResponse, theseErrs := bidder.MakeBids(&spec.BidRequest, spec.HttpCalls[i].Request.ToRequestData(t), spec.HttpCalls[i].Response.ToResponseData(t))

bidsErrs = append(bidsErrs, theseErrs...)
bidResponses = append(bidResponses, thisBidResponse)
}

// Assert actual errors thrown by MakeBids implementation versus expected JSON-defined spec.MakeBidsErrors
assertErrorList(t, fmt.Sprintf("%s: MakeBids", filename), bidsErrs, spec.MakeBidsErrors)

// Assert MakeBids implementation BidResponses with expected JSON-defined spec.BidResponses[i].Bids
for i := 0; i < len(spec.BidResponses); i++ {
assertMakeBidsOutput(t, filename, bidResponses[i], spec.BidResponses[i].Bids)
}
}
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1 change: 1 addition & 0 deletions go.mod
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@ require (
github.com/mattn/go-colorable v0.1.2 // indirect
github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
github.com/mitchellh/mapstructure v1.0.0 // indirect
github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826
github.com/mxmCherry/openrtb/v15 v15.0.0
github.com/pelletier/go-toml v1.2.0 // indirect
github.com/prebid/go-gdpr v0.8.3
Expand Down
9 changes: 2 additions & 7 deletions go.sum
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -75,6 +75,8 @@ github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0j
github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
github.com/mitchellh/mapstructure v1.0.0 h1:vVpGvMXJPqSDh2VYHF7gsfQj8Ncx+Xw5Y1KHeTRY+7I=
github.com/mitchellh/mapstructure v1.0.0/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 h1:RWengNIwukTxcDr9M+97sNutRR1RKhG96O6jWumTTnw=
github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826/go.mod h1:TaXosZuwdSHYgviHp1DAtfrULt5eUgsSMsZf+YrPgl8=
github.com/mxmCherry/openrtb/v15 v15.0.0 h1:inLuQ3Bsima9HLB2v6WjbtEFF69SWOT5Dux4QZtYdrw=
github.com/mxmCherry/openrtb/v15 v15.0.0/go.mod h1:TVgncsz6MOzbL7lhun1lNuUBzVBlVDbxf9Fyy1TyhZA=
github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=
Expand Down Expand Up @@ -123,7 +125,6 @@ github.com/spf13/viper v1.1.0/go.mod h1:A8kyI5cUJhb8N+3pkfONlcEcZbueH6nhAm0Fq7Sr
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/objx v0.1.1 h1:2vfRuCMp5sSVIDSqO8oNnWJq7mPa6KVP3iPIwFBuy8A=
github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
Expand All @@ -146,7 +147,6 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/net v0.0.0-20180906233101-161cd47e91fd h1:nTDtHvHSdCn1m6ITfMRqtOd/9+7a3s8RBNOZ3eYZzJA=
golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
Expand All @@ -157,10 +157,8 @@ golang.org/x/net v0.0.0-20201202161906-c7110b5ffcbb/go.mod h1:sp8m0HH+o8qH0wwXwY
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e h1:o3PsSEY8E4eXWkXrIP9YJALUkVZqzHJT5DOasTyn8Vs=
golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223 h1:DH4skfRX4EBpamg7iV4ZlCpblAHI6s6TDM39bFZumv8=
golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190904154756-749cb33beabd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
Expand All @@ -170,7 +168,6 @@ golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7w
golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210112080510-489259a85091 h1:DMyOG0U+gKfu8JZzg2UQe9MeaC1X+xQWlAKcRnjxjCw=
golang.org/x/sys v0.0.0-20210112080510-489259a85091/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
Expand All @@ -191,11 +188,9 @@ google.golang.org/protobuf v1.23.0 h1:4MY060fB1DLGMB/7MBTLnwQUY6+F09GEiz6SsrNqyz
google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
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