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tests: Validate etcd linearizability
Signed-off-by: Marek Siarkowicz <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,11 @@ | ||
| name: Linearizability | ||
| on: [push, pull_request] | ||
| jobs: | ||
| test: | ||
| runs-on: ubuntu-latest | ||
| steps: | ||
| - uses: actions/checkout@v2 | ||
| - uses: actions/setup-go@v2 | ||
| with: | ||
| go-version: "1.19.1" | ||
| - run: make test-linearizability |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| // Copyright 2022 The etcd Authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package linearizability | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "go.etcd.io/etcd/tests/v3/framework" | ||
| ) | ||
|
|
||
| var testRunner = framework.E2eTestRunner | ||
|
|
||
| func TestMain(m *testing.M) { | ||
| testRunner.TestMain(m) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| // Copyright 2022 The etcd Authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package linearizability | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
|
|
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| "github.com/anishathalye/porcupine" | ||
| ) | ||
|
|
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| type Operation int8 | ||
|
|
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| const Read Operation = 0 | ||
| const Put Operation = 1 | ||
|
|
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| type etcdRequest struct { | ||
| op Operation | ||
| writeData string | ||
| } | ||
|
|
||
| type etcdResponse struct { | ||
| readData string | ||
| err error | ||
| } | ||
|
|
||
| type EtcdState struct { | ||
| Value string | ||
| FailedWrites []string | ||
| } | ||
|
|
||
| var etcdModel = porcupine.Model{ | ||
| Init: func() interface{} { return "{}" }, | ||
| Step: func(st interface{}, in interface{}, out interface{}) (bool, interface{}) { | ||
| stateString := st.(string) | ||
| var state EtcdState | ||
| err := json.Unmarshal([]byte(stateString), &state) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| request := in.(etcdRequest) | ||
| response := out.(etcdResponse) | ||
| ok, state := step(state, request, response) | ||
| data, err := json.Marshal(state) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| return ok, string(data) | ||
| }, | ||
| DescribeOperation: func(in, out interface{}) string { | ||
| request := in.(etcdRequest) | ||
| response := out.(etcdResponse) | ||
| var call, args, resp string | ||
| switch request.op { | ||
| case Read: | ||
| call = "read" | ||
| if response.err != nil { | ||
| resp = response.err.Error() | ||
| } else { | ||
| resp = response.readData | ||
| } | ||
| case Put: | ||
| call = "write" | ||
| args = request.writeData | ||
| if response.err != nil { | ||
| resp = response.err.Error() | ||
| } else { | ||
| resp = "ok" | ||
| } | ||
| default: | ||
| return "<invalid>" | ||
| } | ||
| return fmt.Sprintf("%s(%q) -> %s", call, args, resp) | ||
| }, | ||
| } | ||
|
|
||
| func step(state EtcdState, request etcdRequest, response etcdResponse) (bool, EtcdState) { | ||
| var ok bool | ||
| switch request.op { | ||
| case Read: | ||
| ok = state.Value == response.readData | ||
| if !ok { | ||
| for i, write := range state.FailedWrites { | ||
| if write == response.readData { | ||
| ok = true | ||
| state = EtcdState{Value: write, FailedWrites: append(state.FailedWrites[:i], state.FailedWrites[i+1:]...)} | ||
| break | ||
| } | ||
| } | ||
| } | ||
| case Put: | ||
| if response.err == nil { | ||
| state.Value = request.writeData | ||
| } else { | ||
| state.FailedWrites = append(state.FailedWrites, request.writeData) | ||
| } | ||
| ok = true | ||
| } | ||
| return ok, state | ||
| } |
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