mirror of
https://github.com/etcd-io/etcd.git
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530 lines
21 KiB
Go
530 lines
21 KiB
Go
// Copyright 2022 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package model
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import (
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"errors"
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"testing"
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"github.com/stretchr/testify/assert"
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"go.etcd.io/etcd/api/v3/mvccpb"
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)
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func TestModelNonDeterministic(t *testing.T) {
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nonDeterministicTestScenarios := []nonDeterministicModelTest{}
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for _, tc := range deterministicModelTestScenarios {
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nonDeterministicTestScenarios = append(nonDeterministicTestScenarios, toNonDeterministicTest(tc))
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}
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nonDeterministicTestScenarios = append(nonDeterministicTestScenarios, []nonDeterministicModelTest{
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{
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name: "First Put request fails, but is persisted",
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operations: []nonDeterministicOperation{
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{req: putRequest("key1", "1"), resp: failedResponse(errors.New("failed"))},
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{req: putRequest("key2", "2"), resp: putResponse(3)},
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{req: rangeRequest("key", true, 0), resp: rangeResponse([]*mvccpb.KeyValue{{Key: []byte("key1"), Value: []byte("1"), ModRevision: 2}, {Key: []byte("key2"), Value: []byte("2"), ModRevision: 3}}, 2, 3)},
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},
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},
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{
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name: "First Put request fails, and is lost",
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operations: []nonDeterministicOperation{
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{req: putRequest("key1", "1"), resp: failedResponse(errors.New("failed"))},
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{req: putRequest("key2", "2"), resp: putResponse(2)},
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{req: rangeRequest("key", true, 0), resp: rangeResponse([]*mvccpb.KeyValue{{Key: []byte("key2"), Value: []byte("2"), ModRevision: 2}}, 1, 2)},
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},
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},
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{
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name: "Put can fail and be lost before get",
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operations: []nonDeterministicOperation{
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{req: putRequest("key", "1"), resp: putResponse(1)},
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{req: putRequest("key", "1"), resp: failedResponse(errors.New("failed"))},
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{req: getRequest("key"), resp: getResponse("key", "1", 1, 1)},
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{req: getRequest("key"), resp: getResponse("key", "2", 1, 1), expectFailure: true},
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{req: getRequest("key"), resp: getResponse("key", "1", 1, 2), expectFailure: true},
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{req: getRequest("key"), resp: getResponse("key", "2", 1, 2), expectFailure: true},
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},
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},
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{
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name: "Put can fail and be lost before put",
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operations: []nonDeterministicOperation{
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{req: getRequest("key"), resp: emptyGetResponse(1)},
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{req: putRequest("key", "1"), resp: failedResponse(errors.New("failed"))},
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{req: putRequest("key", "3"), resp: putResponse(2)},
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},
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},
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{
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name: "Put can fail and be lost before delete",
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operations: []nonDeterministicOperation{
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{req: deleteRequest("key"), resp: deleteResponse(0, 1)},
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{req: putRequest("key", "1"), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: deleteResponse(0, 1)},
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},
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},
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{
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name: "Put can fail and be lost before txn",
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operations: []nonDeterministicOperation{
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// Txn failure
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{req: getRequest("key"), resp: emptyGetResponse(1)},
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{req: putRequest("key", "1"), resp: failedResponse(errors.New("failed"))},
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{req: compareRevisionAndPutRequest("key", 2, "3"), resp: compareRevisionAndPutResponse(false, 1)},
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// Txn success
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{req: putRequest("key", "2"), resp: putResponse(2)},
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{req: putRequest("key", "4"), resp: failedResponse(errors.New("failed"))},
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{req: compareRevisionAndPutRequest("key", 2, "5"), resp: compareRevisionAndPutResponse(true, 3)},
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},
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},
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{
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name: "Put can fail and be lost before txn success",
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operations: []nonDeterministicOperation{},
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},
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{
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name: "Put can fail but be persisted and increase revision before get",
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operations: []nonDeterministicOperation{
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// One failed request, one persisted.
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{req: putRequest("key", "1"), resp: putResponse(1)},
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{req: putRequest("key", "2"), resp: failedResponse(errors.New("failed"))},
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{req: getRequest("key"), resp: getResponse("key", "3", 2, 2), expectFailure: true},
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{req: getRequest("key"), resp: getResponse("key", "3", 1, 2), expectFailure: true},
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{req: getRequest("key"), resp: getResponse("key", "2", 1, 1), expectFailure: true},
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{req: getRequest("key"), resp: getResponse("key", "2", 2, 2)},
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// Two failed request, two persisted.
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{req: putRequest("key", "3"), resp: failedResponse(errors.New("failed"))},
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{req: putRequest("key", "4"), resp: failedResponse(errors.New("failed"))},
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{req: getRequest("key"), resp: getResponse("key", "4", 4, 4)},
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},
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},
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{
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name: "Put can fail but be persisted and increase revision before delete",
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operations: []nonDeterministicOperation{
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// One failed request, one persisted.
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{req: deleteRequest("key"), resp: deleteResponse(0, 1)},
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{req: putRequest("key", "1"), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: deleteResponse(1, 1), expectFailure: true},
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{req: deleteRequest("key"), resp: deleteResponse(1, 2), expectFailure: true},
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{req: deleteRequest("key"), resp: deleteResponse(1, 3)},
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// Two failed request, two persisted.
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{req: putRequest("key", "4"), resp: putResponse(4)},
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{req: putRequest("key", "5"), resp: failedResponse(errors.New("failed"))},
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{req: putRequest("key", "6"), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: deleteResponse(1, 7)},
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// Two failed request, one persisted.
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{req: putRequest("key", "8"), resp: putResponse(8)},
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{req: putRequest("key", "9"), resp: failedResponse(errors.New("failed"))},
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{req: putRequest("key", "10"), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: deleteResponse(1, 10)},
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},
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},
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{
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name: "Put can fail but be persisted before txn",
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operations: []nonDeterministicOperation{
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// Txn success
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{req: getRequest("key"), resp: emptyGetResponse(1)},
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{req: putRequest("key", "2"), resp: failedResponse(errors.New("failed"))},
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{req: compareRevisionAndPutRequest("key", 2, ""), resp: compareRevisionAndPutResponse(true, 2), expectFailure: true},
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{req: compareRevisionAndPutRequest("key", 2, ""), resp: compareRevisionAndPutResponse(true, 3)},
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// Txn failure
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{req: putRequest("key", "4"), resp: putResponse(4)},
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{req: compareRevisionAndPutRequest("key", 5, ""), resp: compareRevisionAndPutResponse(false, 4)},
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{req: putRequest("key", "5"), resp: failedResponse(errors.New("failed"))},
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{req: getRequest("key"), resp: getResponse("key", "5", 5, 5)},
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},
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},
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{
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name: "Delete can fail and be lost before get",
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operations: []nonDeterministicOperation{
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{req: putRequest("key", "1"), resp: putResponse(1)},
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: getRequest("key"), resp: getResponse("key", "1", 1, 1)},
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{req: getRequest("key"), resp: emptyGetResponse(2), expectFailure: true},
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{req: getRequest("key"), resp: emptyGetResponse(2), expectFailure: true},
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{req: getRequest("key"), resp: emptyGetResponse(1), expectFailure: true},
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},
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},
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{
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name: "Delete can fail and be lost before delete",
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operations: []nonDeterministicOperation{
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{req: putRequest("key", "1"), resp: putResponse(1)},
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: deleteResponse(1, 1), expectFailure: true},
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{req: deleteRequest("key"), resp: deleteResponse(1, 2)},
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},
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},
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{
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name: "Delete can fail and be lost before put",
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operations: []nonDeterministicOperation{
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{req: putRequest("key", "1"), resp: putResponse(1)},
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: putRequest("key", "1"), resp: putResponse(2)},
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},
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},
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{
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name: "Delete can fail but be persisted before get",
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operations: []nonDeterministicOperation{
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// One failed request, one persisted.
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{req: putRequest("key", "1"), resp: putResponse(1)},
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: getRequest("key"), resp: emptyGetResponse(2)},
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// Two failed request, one persisted.
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{req: putRequest("key", "3"), resp: putResponse(3)},
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: getRequest("key"), resp: emptyGetResponse(4)},
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},
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},
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{
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name: "Delete can fail but be persisted before put",
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operations: []nonDeterministicOperation{
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// One failed request, one persisted.
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{req: putRequest("key", "1"), resp: putResponse(1)},
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: putRequest("key", "3"), resp: putResponse(3)},
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// Two failed request, one persisted.
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: putRequest("key", "5"), resp: putResponse(5)},
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},
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},
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{
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name: "Delete can fail but be persisted before delete",
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operations: []nonDeterministicOperation{
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// One failed request, one persisted.
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{req: putRequest("key", "1"), resp: putResponse(1)},
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: deleteResponse(0, 2)},
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{req: putRequest("key", "3"), resp: putResponse(3)},
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// Two failed request, one persisted.
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: deleteResponse(0, 4)},
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},
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},
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{
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name: "Delete can fail but be persisted before txn",
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operations: []nonDeterministicOperation{
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// Txn success
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{req: getRequest("key"), resp: getResponse("key", "1", 1, 1)},
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: compareRevisionAndPutRequest("key", 0, "3"), resp: compareRevisionAndPutResponse(true, 3)},
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// Txn failure
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{req: putRequest("key", "4"), resp: putResponse(4)},
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{req: deleteRequest("key"), resp: failedResponse(errors.New("failed"))},
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{req: compareRevisionAndPutRequest("key", 4, "5"), resp: compareRevisionAndPutResponse(false, 5)},
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},
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},
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{
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name: "Txn can fail and be lost before get",
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operations: []nonDeterministicOperation{
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{req: getRequest("key"), resp: getResponse("key", "1", 1, 1)},
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{req: compareRevisionAndPutRequest("key", 1, "2"), resp: failedResponse(errors.New("failed"))},
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{req: getRequest("key"), resp: getResponse("key", "1", 1, 1)},
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{req: getRequest("key"), resp: getResponse("key", "2", 2, 2), expectFailure: true},
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},
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},
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{
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name: "Txn can fail and be lost before delete",
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operations: []nonDeterministicOperation{
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{req: getRequest("key"), resp: getResponse("key", "1", 1, 1)},
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{req: compareRevisionAndPutRequest("key", 1, "2"), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: deleteResponse(1, 2)},
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},
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},
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{
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name: "Txn can fail and be lost before put",
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operations: []nonDeterministicOperation{
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{req: getRequest("key"), resp: getResponse("key", "1", 1, 1)},
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{req: compareRevisionAndPutRequest("key", 1, "2"), resp: failedResponse(errors.New("failed"))},
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{req: putRequest("key", "3"), resp: putResponse(2)},
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},
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},
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{
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name: "Txn can fail but be persisted before get",
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operations: []nonDeterministicOperation{
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// One failed request, one persisted.
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{req: getRequest("key"), resp: getResponse("key", "1", 1, 1)},
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{req: compareRevisionAndPutRequest("key", 1, "2"), resp: failedResponse(errors.New("failed"))},
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{req: getRequest("key"), resp: getResponse("key", "2", 1, 1), expectFailure: true},
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{req: getRequest("key"), resp: getResponse("key", "2", 2, 2)},
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// Two failed request, two persisted.
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{req: putRequest("key", "3"), resp: putResponse(3)},
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{req: compareRevisionAndPutRequest("key", 3, "4"), resp: failedResponse(errors.New("failed"))},
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{req: compareRevisionAndPutRequest("key", 4, "5"), resp: failedResponse(errors.New("failed"))},
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{req: getRequest("key"), resp: getResponse("key", "5", 5, 5)},
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},
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},
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{
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name: "Txn can fail but be persisted before put",
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operations: []nonDeterministicOperation{
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// One failed request, one persisted.
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{req: getRequest("key"), resp: getResponse("key", "1", 1, 1)},
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{req: compareRevisionAndPutRequest("key", 1, "2"), resp: failedResponse(errors.New("failed"))},
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{req: putRequest("key", "3"), resp: putResponse(3)},
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// Two failed request, two persisted.
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{req: putRequest("key", "4"), resp: putResponse(4)},
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{req: compareRevisionAndPutRequest("key", 4, "5"), resp: failedResponse(errors.New("failed"))},
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{req: compareRevisionAndPutRequest("key", 5, "6"), resp: failedResponse(errors.New("failed"))},
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{req: putRequest("key", "7"), resp: putResponse(7)},
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},
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},
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{
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name: "Txn can fail but be persisted before delete",
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operations: []nonDeterministicOperation{
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// One failed request, one persisted.
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{req: getRequest("key"), resp: getResponse("key", "1", 1, 1)},
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{req: compareRevisionAndPutRequest("key", 1, "2"), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: deleteResponse(1, 3)},
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// Two failed request, two persisted.
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{req: putRequest("key", "4"), resp: putResponse(4)},
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{req: compareRevisionAndPutRequest("key", 4, "5"), resp: failedResponse(errors.New("failed"))},
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{req: compareRevisionAndPutRequest("key", 5, "6"), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: deleteResponse(1, 7)},
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},
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},
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{
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name: "Txn can fail but be persisted before txn",
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operations: []nonDeterministicOperation{
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// One failed request, one persisted with success.
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{req: getRequest("key"), resp: getResponse("key", "1", 1, 1)},
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{req: compareRevisionAndPutRequest("key", 1, "2"), resp: failedResponse(errors.New("failed"))},
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{req: compareRevisionAndPutRequest("key", 2, "3"), resp: compareRevisionAndPutResponse(true, 3)},
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// Two failed request, two persisted with success.
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{req: putRequest("key", "4"), resp: putResponse(4)},
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{req: compareRevisionAndPutRequest("key", 4, "5"), resp: failedResponse(errors.New("failed"))},
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{req: compareRevisionAndPutRequest("key", 5, "6"), resp: failedResponse(errors.New("failed"))},
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{req: compareRevisionAndPutRequest("key", 6, "7"), resp: compareRevisionAndPutResponse(true, 7)},
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// One failed request, one persisted with failure.
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{req: putRequest("key", "8"), resp: putResponse(8)},
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{req: compareRevisionAndPutRequest("key", 8, "9"), resp: failedResponse(errors.New("failed"))},
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{req: compareRevisionAndPutRequest("key", 8, "10"), resp: compareRevisionAndPutResponse(false, 9)},
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},
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},
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{
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name: "Defragment failures between all other request types",
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operations: []nonDeterministicOperation{
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{req: defragmentRequest(), resp: failedResponse(errors.New("failed"))},
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{req: leaseGrantRequest(1), resp: leaseGrantResponse(1)},
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{req: defragmentRequest(), resp: failedResponse(errors.New("failed"))},
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{req: putWithLeaseRequest("key", "1", 1), resp: putResponse(2)},
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{req: defragmentRequest(), resp: failedResponse(errors.New("failed"))},
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{req: leaseRevokeRequest(1), resp: leaseRevokeResponse(3)},
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{req: defragmentRequest(), resp: failedResponse(errors.New("failed"))},
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{req: putRequest("key", "4"), resp: putResponse(4)},
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{req: defragmentRequest(), resp: failedResponse(errors.New("failed"))},
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{req: getRequest("key"), resp: getResponse("key", "4", 4, 4)},
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{req: defragmentRequest(), resp: failedResponse(errors.New("failed"))},
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{req: compareRevisionAndPutRequest("key", 4, "5"), resp: compareRevisionAndPutResponse(true, 5)},
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{req: defragmentRequest(), resp: failedResponse(errors.New("failed"))},
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{req: deleteRequest("key"), resp: deleteResponse(1, 6)},
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{req: defragmentRequest(), resp: failedResponse(errors.New("failed"))},
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},
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},
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}...)
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for _, tc := range nonDeterministicTestScenarios {
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tc := tc
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t.Run(tc.name, func(t *testing.T) {
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state := NonDeterministicModel.Init()
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for _, op := range tc.operations {
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ok, newState := NonDeterministicModel.Step(state, op.req, op.resp)
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if ok != !op.expectFailure {
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t.Logf("state: %v", state)
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t.Errorf("Unexpected operation result, expect: %v, got: %v, operation: %s", !op.expectFailure, ok, NonDeterministicModel.DescribeOperation(op.req, op.resp))
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}
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if ok {
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state = newState
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t.Logf("state: %v", state)
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}
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}
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})
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}
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}
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type nonDeterministicModelTest struct {
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name string
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operations []nonDeterministicOperation
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}
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type nonDeterministicOperation struct {
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req EtcdRequest
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resp EtcdNonDeterministicResponse
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expectFailure bool
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}
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func toNonDeterministicTest(tc deterministicModelTest) nonDeterministicModelTest {
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operations := []nonDeterministicOperation{}
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for _, op := range tc.operations {
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operations = append(operations, nonDeterministicOperation{
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req: op.req,
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resp: EtcdNonDeterministicResponse{EtcdResponse: op.resp},
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expectFailure: op.expectFailure,
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})
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}
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return nonDeterministicModelTest{
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name: tc.name,
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operations: operations,
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}
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}
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func TestModelResponseMatch(t *testing.T) {
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tcs := []struct {
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resp1 EtcdNonDeterministicResponse
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resp2 EtcdNonDeterministicResponse
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expectMatch bool
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}{
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{
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resp1: getResponse("key", "a", 1, 1),
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resp2: getResponse("key", "a", 1, 1),
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expectMatch: true,
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},
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{
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resp1: getResponse("key", "a", 1, 1),
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resp2: getResponse("key", "b", 1, 1),
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expectMatch: false,
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},
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{
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resp1: getResponse("key", "a", 1, 1),
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resp2: getResponse("key", "a", 2, 1),
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expectMatch: false,
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},
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{
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resp1: getResponse("key", "a", 1, 1),
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resp2: getResponse("key", "a", 1, 2),
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expectMatch: false,
|
|
},
|
|
{
|
|
resp1: getResponse("key", "a", 1, 1),
|
|
resp2: failedResponse(errors.New("failed request")),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: getResponse("key", "a", 1, 1),
|
|
resp2: unknownResponse(1),
|
|
expectMatch: true,
|
|
},
|
|
{
|
|
resp1: getResponse("key", "a", 1, 1),
|
|
resp2: unknownResponse(0),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: putResponse(3),
|
|
resp2: putResponse(3),
|
|
expectMatch: true,
|
|
},
|
|
{
|
|
resp1: putResponse(3),
|
|
resp2: putResponse(4),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: putResponse(3),
|
|
resp2: failedResponse(errors.New("failed request")),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: putResponse(3),
|
|
resp2: unknownResponse(3),
|
|
expectMatch: true,
|
|
},
|
|
{
|
|
resp1: putResponse(3),
|
|
resp2: unknownResponse(0),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: deleteResponse(1, 5),
|
|
resp2: deleteResponse(1, 5),
|
|
expectMatch: true,
|
|
},
|
|
{
|
|
resp1: deleteResponse(1, 5),
|
|
resp2: deleteResponse(0, 5),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: deleteResponse(1, 5),
|
|
resp2: deleteResponse(1, 6),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: deleteResponse(1, 5),
|
|
resp2: failedResponse(errors.New("failed request")),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: deleteResponse(1, 5),
|
|
resp2: unknownResponse(5),
|
|
expectMatch: true,
|
|
},
|
|
{
|
|
resp1: deleteResponse(0, 5),
|
|
resp2: unknownResponse(0),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: deleteResponse(1, 5),
|
|
resp2: unknownResponse(0),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: deleteResponse(0, 5),
|
|
resp2: unknownResponse(2),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: compareRevisionAndPutResponse(false, 7),
|
|
resp2: compareRevisionAndPutResponse(false, 7),
|
|
expectMatch: true,
|
|
},
|
|
{
|
|
resp1: compareRevisionAndPutResponse(true, 7),
|
|
resp2: compareRevisionAndPutResponse(false, 7),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: compareRevisionAndPutResponse(false, 7),
|
|
resp2: compareRevisionAndPutResponse(false, 8),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: compareRevisionAndPutResponse(false, 7),
|
|
resp2: failedResponse(errors.New("failed request")),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: compareRevisionAndPutResponse(true, 7),
|
|
resp2: unknownResponse(7),
|
|
expectMatch: true,
|
|
},
|
|
{
|
|
resp1: compareRevisionAndPutResponse(false, 7),
|
|
resp2: unknownResponse(7),
|
|
expectMatch: true,
|
|
},
|
|
{
|
|
resp1: compareRevisionAndPutResponse(true, 7),
|
|
resp2: unknownResponse(0),
|
|
expectMatch: false,
|
|
},
|
|
{
|
|
resp1: compareRevisionAndPutResponse(false, 7),
|
|
resp2: unknownResponse(0),
|
|
expectMatch: false,
|
|
},
|
|
}
|
|
for i, tc := range tcs {
|
|
assert.Equal(t, tc.expectMatch, Match(tc.resp1, tc.resp2), "%d %+v %+v", i, tc.resp1, tc.resp2)
|
|
}
|
|
}
|