| 1 | var chai = require('chai'),
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| 2 | spies = require('chai-spies'),
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| 3 | AWS = require('aws-sdk'),
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| 4 | _= require('underscore'),
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| 5 | dyngo= require('../index.js');
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| 6 |
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| 7 | chai.use(spies);
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| 8 |
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| 9 | var should= chai.should(),
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| 10 | assert= chai.assert;
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| 11 |
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| 12 | const noerr= function (done)
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| 13 | {
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| 14 | return function (err)
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| 15 | {
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| 16 | should.not.exist(err);
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| 17 | done();
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| 18 | };
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| 19 | },
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| 20 | accept= function (code,done)
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| 21 | {
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| 22 | return function (err)
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| 23 | {
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| 24 | if (err.code==code)
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| 25 | done();
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| 26 | else
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| 27 | done(err);
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| 28 | };
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| 29 | };
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| 30 |
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| 31 | describe('transactions',function ()
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| 32 | {
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| 33 | var db;
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| 34 |
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| 35 | before(function (done)
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| 36 | {
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| 37 | dyngo({ dynamo: { endpoint: new AWS.Endpoint('http://localhost:8000') }, hints: false },
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| 38 | function (err,_db)
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| 39 | {
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| 40 | db= _db;
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| 41 |
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| 42 | db.ensureTransactionTable().success(done).error(done);
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| 43 | });
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| 44 | });
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| 45 |
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| 46 | beforeEach(function (done)
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| 47 | {
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| 48 | db.test.remove().success(done)
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| 49 | .error(done);
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| 50 | });
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| 51 |
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| 52 | describe('insert',function ()
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| 53 | {
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| 54 |
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| 55 | it('If transaction A inserts a new object transaction B cannot see it while not committed (transient)',
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| 56 | function (done)
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| 57 | {
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| 58 | db.transaction().transaction(function (A)
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| 59 | {
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| 60 | db.transaction().transaction(function (B)
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| 61 | {
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| 62 | A.test.save({ _id: 'transient' }).success(function ()
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| 63 | {
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| 64 | B.test.findOne({ _id: 'transient' })
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| 65 | .result(should.not.exist)
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| 66 | .error(accept('notfound',done));
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| 67 | }).error(done);
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| 68 | }).error(done);
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| 69 | }).error(done);
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| 70 | });
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| 71 |
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| 72 | it('If transaction A inserts a new object, while there was a transient object already present, transaction B cannot see it while not committed (transient)',
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| 73 | function (done)
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| 74 | {
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| 75 | db.transaction().transaction(function (A)
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| 76 | {
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| 77 | db.transaction().transaction(function (B)
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| 78 | {
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| 79 | A.test.save({ _id: 'transient2' }).success(function ()
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| 80 | {
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| 81 | A.test.save({ _id: 'transient2' }).success(function ()
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| 82 | {
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| 83 | B.test.findOne({ _id: 'transient2' })
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| 84 | .result(should.not.exist)
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| 85 | .error(accept('notfound',done));
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| 86 | }).error(done);
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| 87 | }).error(done);
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| 88 | }).error(done);
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| 89 | }).error(done);
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| 90 | });
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| 91 |
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| 92 | it('If transaction A inserts a new object, and commit, transaction B can see the new object',
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| 93 | function (done)
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| 94 | {
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| 95 | db.transaction().transaction(function (A)
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| 96 | {
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| 97 | db.transaction().transaction(function (B)
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| 98 | {
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| 99 | A.test.save({ _id: 'transient3' }).success(function ()
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| 100 | {
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| 101 | A.commit().committed(function ()
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| 102 | {
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| 103 | B.test.findOne({ _id: 'transient3' })
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| 104 | .result(function (r)
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| 105 | {
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| 106 | should.exist(r);
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| 107 | r._id.should.equal('transient3');
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| 108 | done();
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| 109 | })
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| 110 | .error(done);
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| 111 | }).error(done);
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| 112 | }).error(done);
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| 113 | }).error(done);
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| 114 | }).error(done);
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| 115 | });
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| 116 |
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| 117 | });
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| 118 |
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| 119 | describe('delete',function ()
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| 120 | {
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| 121 |
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| 122 | it('If transaction A deletes an object and does not commit, transaction B can see the object, but transaction A can\'t',
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| 123 | function (done)
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| 124 | {
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| 125 | db.test.save({ _id: 'delete1' }).success(function ()
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| 126 | {
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| 127 | db.transaction().transaction(function (A)
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| 128 | {
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| 129 | db.transaction().transaction(function (B)
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| 130 | {
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| 131 | A.test.remove({ _id: 'delete1' }).success(function ()
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| 132 | {
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| 133 | B.test.findOne({ _id: 'delete1' })
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| 134 | .result(function (r)
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| 135 | {
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| 136 | should.exist(r);
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| 137 | r._id.should.equal('delete1');
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| 138 |
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| 139 | A.test.findOne({ _id: 'delete1' })
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| 140 | .result(should.not.exist)
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| 141 | .error(accept('notfound',done));
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| 142 | })
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| 143 | .error(done);
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| 144 |
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| 145 | }).error(done);
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| 146 | }).error(done);
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| 147 | }).error(done);
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| 148 | }).error(done);
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| 149 | });
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| 150 |
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| 151 | it('If transaction A deletes an object and commit, transaction B cannot see the object',
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| 152 | function (done)
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| 153 | {
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| 154 | db.test.save({ _id: 'delete2' }).success(function ()
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| 155 | {
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| 156 | db.transaction().transaction(function (A)
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| 157 | {
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| 158 | db.transaction().transaction(function (B)
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| 159 | {
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| 160 | A.test.remove({ _id: 'delete2' }).success(function ()
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| 161 | {
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| 162 | A.commit().committed(function ()
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| 163 | {
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| 164 | B.test.findOne({ _id: 'delete2' })
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| 165 | .result(should.not.exist)
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| 166 | .error(accept('notfound',done));
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| 167 | }).error(done);
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| 168 | }).error(done);
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| 169 | }).error(done);
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| 170 | }).error(done);
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| 171 | }).error(done);
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| 172 | });
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| 173 |
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| 174 | });
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| 175 |
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| 176 | describe('update',function ()
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| 177 | {
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| 178 |
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| 179 | it('If transaction A updates an object and does not commit, transaction B still see the old version of the object, when A commits, B sees the new version',
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| 180 | function (done)
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| 181 | {
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| 182 | var obj= { _id: 'update1', n: 0 };
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| 183 |
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| 184 | db.test.save(obj).success(function ()
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| 185 | {
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| 186 | db.transaction().transaction(function (A)
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| 187 | {
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| 188 | db.transaction().transaction(function (B)
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| 189 | {
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| 190 | obj.name= 'Update2';
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| 191 | obj.n++;
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| 192 |
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| 193 | A.test.save(obj).success(function ()
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| 194 | {
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| 195 | B.test.findOne({ _id: 'update1' })
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| 196 | .result(function (copy)
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| 197 | {
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| 198 | should.not.exist(copy.name);
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| 199 | copy.n.should.equal(0);
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| 200 |
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| 201 | A.test.findOne({ _id: 'update1' })
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| 202 | .result(function (copy)
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| 203 | {
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| 204 | copy.name.should.equal('Update2');
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| 205 | copy.n.should.equal(1);
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| 206 |
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| 207 | A.commit().committed(function ()
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| 208 | {
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| 209 | B.test.findOne({ _id: 'update1' })
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| 210 | .result(function (copy)
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| 211 | {
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| 212 | copy.name.should.equal('Update2');
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| 213 | copy.n.should.equal(1);
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| 214 |
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| 215 | done();
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| 216 | })
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| 217 | .error(done);
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| 218 | })
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| 219 | .error(done);
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| 220 | })
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| 221 | .error(done);
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| 222 | })
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| 223 | .error(done);
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| 224 | }).error(done);
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| 225 | }).error(done);
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| 226 | }).error(done);
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| 227 | }).error(done);
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| 228 | });
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| 229 |
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| 230 | });
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| 231 |
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| 232 | describe('query',function ()
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| 233 | {
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| 234 | it('If transaction A inserts an item without committing, transaction B should not see the inserted item until commited',
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| 235 | function (done)
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| 236 | {
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| 237 | var items= _.collect(_.range(10),function (n) { return { _id: 'item'+n, n: n+1 } });
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| 238 |
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| 239 | db.test.save(items).success(function ()
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| 240 | {
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| 241 | db.transaction().transaction(function (A)
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| 242 | {
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| 243 | db.transaction().transaction(function (B)
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| 244 | {
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| 245 | A.test.save({ _id: 'itemS', n: 0 }).success(function ()
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| 246 | {
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| 247 | B.test.find().sort({ n: 1 }).limit(3)
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| 248 | .results(function (objs)
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| 249 | {
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| 250 | objs[0].n.should.equal(1);
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| 251 | objs.length.should.equal(3);
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| 252 | })
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| 253 | .error(done)
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| 254 | .end(function ()
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| 255 | {
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| 256 | A.test.find().sort({ n: 1 }).limit(3)
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| 257 | .results(function (objs)
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| 258 | {
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| 259 | objs[0].n.should.equal(0);
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| 260 | objs.length.should.equal(3);
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| 261 | })
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| 262 | .error(done)
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| 263 | .end(function ()
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| 264 | {
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| 265 | A.commit().committed(function ()
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| 266 | {
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| 267 | B.test.find().sort({ n: 1 }).limit(3)
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| 268 | .results(function (objs)
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| 269 | {
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| 270 | objs[0].n.should.equal(0);
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| 271 | objs.length.should.equal(3);
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| 272 | })
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| 273 | .error(done)
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| 274 | .end(done);
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| 275 | });
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| 276 | });
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| 277 | });
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| 278 | }).error(done);
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| 279 | });
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| 280 | });
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| 281 | });
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| 282 | });
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| 283 | });
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| 284 |
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| 285 | describe('concurrency',function ()
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| 286 | {
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| 287 | it('rollsback competing transaction',
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| 288 | function (done)
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| 289 | {
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| 290 | db.test.save({ _id: 'hot', name: 'Hot' }).success(function ()
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| 291 | {
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| 292 | db.transaction().transaction(function (A)
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| 293 | {
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| 294 | db.transaction().transaction(function (B)
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| 295 | {
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| 296 | A.test.findOne({ _id: 'hot' })
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| 297 | .result(function (hotA)
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| 298 | {
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| 299 | hotA.name= 'HotA';
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| 300 |
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| 301 | B.test.findOne({ _id: 'hot' })
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| 302 | .result(function (hotB)
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| 303 | {
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| 304 | hotB.name= 'HotB';
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| 305 |
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| 306 | A.test.save(hotA).success(function ()
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| 307 | {
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| 308 | B.test.save(hotB).success(function ()
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| 309 | {
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| 310 | var committedA= chai.spy();
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| 311 |
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| 312 | A.commit()
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| 313 | .committed(committedA)
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| 314 | .error(function (err)
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| 315 | {
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| 316 | if (err.code=='rolledback')
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| 317 | B.commit().committed(function ()
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| 318 | {
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| 319 | db.test.findOne({ _id: 'hot' })
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| 320 | .result(function (obj)
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| 321 | {
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| 322 | committedA.should.not.have.been.called();
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| 323 | obj.name.should.equal('HotB');
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| 324 | done();
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| 325 | })
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| 326 | .error(done);
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| 327 | })
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| 328 | .error(done);
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| 329 | else
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| 330 | done(err);
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| 331 | });
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| 332 | })
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| 333 | .error(done);
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| 334 | })
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| 335 | .error(done);
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| 336 | })
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| 337 | .error(done);
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| 338 | })
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| 339 | .error(done);
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| 340 |
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| 341 | }).error(done);
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| 342 | }).error(done);
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| 343 | }).error(done);
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| 344 | });
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| 345 | });
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| 346 | });
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