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Merge "[FABG-724] Don't Query all the peers for selection"
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,26 @@ | ||
/* | ||
Copyright SecureKey Technologies Inc. All Rights Reserved. | ||
SPDX-License-Identifier: Apache-2.0 | ||
*/ | ||
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package random | ||
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import ( | ||
"math/rand" | ||
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"github.com/hyperledger/fabric-sdk-go/pkg/common/providers/fab" | ||
) | ||
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//PickRandomNPeerConfigs picks N random unique peer configs from given channel peer list | ||
func PickRandomNPeerConfigs(chPeers []fab.ChannelPeer, n int) []fab.PeerConfig { | ||
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var result []fab.PeerConfig | ||
for _, index := range rand.Perm(len(chPeers)) { | ||
result = append(result, chPeers[index].PeerConfig) | ||
if len(result) == n { | ||
break | ||
} | ||
} | ||
return result | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,136 @@ | ||
/* | ||
Copyright SecureKey Technologies Inc. All Rights Reserved. | ||
SPDX-License-Identifier: Apache-2.0 | ||
*/ | ||
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package random | ||
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import ( | ||
"fmt" | ||
"testing" | ||
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pfab "github.com/hyperledger/fabric-sdk-go/pkg/common/providers/fab" | ||
"github.com/stretchr/testify/assert" | ||
) | ||
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func TestPickRandomNPeerConfigs(t *testing.T) { | ||
counter := 20 | ||
allChPeers := createNChannelPeers(counter) | ||
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result := PickRandomNPeerConfigs(allChPeers, 4) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 4, len(result)) | ||
verifyDuplicates(t, result) | ||
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result = PickRandomNPeerConfigs(allChPeers, 1) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 1, len(result)) | ||
verifyDuplicates(t, result) | ||
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result = PickRandomNPeerConfigs(allChPeers, 19) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 19, len(result)) | ||
verifyDuplicates(t, result) | ||
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result = PickRandomNPeerConfigs(allChPeers, 20) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 20, len(result)) | ||
verifyDuplicates(t, result) | ||
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result = PickRandomNPeerConfigs(allChPeers, 21) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 20, len(result)) | ||
verifyDuplicates(t, result) | ||
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result = PickRandomNPeerConfigs(allChPeers, 24) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 20, len(result)) | ||
verifyDuplicates(t, result) | ||
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counter = 7 | ||
allChPeers = createNChannelPeers(counter) | ||
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result = PickRandomNPeerConfigs(allChPeers, 6) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 6, len(result)) | ||
verifyDuplicates(t, result) | ||
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result = PickRandomNPeerConfigs(allChPeers, 7) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 7, len(result)) | ||
verifyDuplicates(t, result) | ||
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result = PickRandomNPeerConfigs(allChPeers, 8) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 7, len(result)) | ||
verifyDuplicates(t, result) | ||
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counter = 2 | ||
allChPeers = createNChannelPeers(counter) | ||
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result = PickRandomNPeerConfigs(allChPeers, 2) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 2, len(result)) | ||
verifyDuplicates(t, result) | ||
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result = PickRandomNPeerConfigs(allChPeers, 24) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 2, len(result)) | ||
verifyDuplicates(t, result) | ||
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counter = 1 | ||
allChPeers = createNChannelPeers(counter) | ||
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result = PickRandomNPeerConfigs(allChPeers, 1) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 1, len(result)) | ||
verifyDuplicates(t, result) | ||
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result = PickRandomNPeerConfigs(allChPeers, 2) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 1, len(result)) | ||
verifyDuplicates(t, result) | ||
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result = PickRandomNPeerConfigs(allChPeers, 24) | ||
assert.NotNil(t, result) | ||
assert.NotEmpty(t, result) | ||
assert.Equal(t, 1, len(result)) | ||
verifyDuplicates(t, result) | ||
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} | ||
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func createNChannelPeers(n int) []pfab.ChannelPeer { | ||
allChPeers := make([]pfab.ChannelPeer, n) | ||
for i := 0; i < n; i++ { | ||
allChPeers[i] = pfab.ChannelPeer{ | ||
NetworkPeer: pfab.NetworkPeer{ | ||
PeerConfig: pfab.PeerConfig{URL: fmt.Sprintf("URL-%d", i)}, | ||
}, | ||
} | ||
} | ||
return allChPeers | ||
} | ||
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func verifyDuplicates(t *testing.T, chPeers []pfab.PeerConfig) { | ||
seen := make(map[string]bool) | ||
for _, v := range chPeers { | ||
if seen[v.URL] { | ||
t.Fatalf("found duplicate channel peer: %s", v.URL) | ||
} | ||
seen[v.URL] = true | ||
} | ||
} |
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