8000 fix(project config): Don't mutate the datafile object by mjc1283 · Pull Request #462 · optimizely/javascript-sdk · GitHub
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fix(project config): Don't mutate the datafile object #462

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Merged
merged 3 commits into from
Apr 22, 2020
Merged

fix(project config): Don't mutate the datafile object #462

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65a95b2
Don't mutate datafile object
Apr 21, 2020
2404797
createMutationSafeDatafileCopy
Apr 21, 2020
310dd5a
Move shallower copies to top
Apr 21, 2020
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30 changes: 29 additions & 1 deletion packages/optimizely-sdk/lib/core/project_config/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -28,13 +28,41 @@ var EXPERIMENT_RUNNING_STATUS = 'Running';
var RESERVED_ATTRIBUTE_PREFIX = '$opt_';
var MODULE_NAME = 'PROJECT_CONFIG';

function createMutationSafeDatafileCopy(datafile) {
var datafileCopy = fns.assign({}, datafile);
datafileCopy.audiences = (datafile.audiences || []).map(function(audience) {
return fns.assign({}, audience);
});
datafileCopy.experiments = (datafile.experiments || []).map(function(experiment) {
return fns.assign({}, experiment);
});
datafileCopy.featureFlags = (datafile.featureFlags || []).map(function(featureFlag) {
return fns.assign({}, featureFlag);
});
datafileCopy.groups = (datafile.groups || []).map(function(group) {
var groupCopy = fns.assign({}, group);
groupCopy.experiments = (group.experiments || []).map(function(experiment) {
return fns.assign({}, experiment);
});
return groupCopy;
});
datafileCopy.rollouts = (datafile.rollouts || []).map(function(rollout) {
var rolloutCopy = fns.assign({}, rollout);
rolloutCopy.experiments = (rollout.experiments || []).map(function(experiment) {
return fns.assign({}, experiment);
});
return rolloutCopy;
});
return datafileCopy;
}

/**
* Creates projectConfig object to be used for quick project property lookup
* @param {Object} datafile JSON datafile representing the project
* @return {Object} Object representing project configuration
*/
export var createProjectConfig = function(datafile) {
var projectConfig = fns.assign({}, datafile);
var projectConfig = createMutationSafeDatafileCopy(datafile);

/*
* Conditions of audiences in projectConfig.typedAudiences are not
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16 changes: 14 additions & 2 deletions packages/optimizely-sdk/lib/core/project_config/index.tests.js
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Expand Up @@ -33,21 +33,26 @@ import configValidator from '../../utils/config_validator';
var logger = getLogger();

describe('lib/core/project_config', function() {
var parsedAudiences = testDatafile.getParsedAudiences;
describe('createProjectConfig method', function() {
it('should set properties correctly when createProjectConfig is called', function() {
var testData = testDatafile.getTestProjectConfig();
var configObj = projectConfig.createProjectConfig(testData);

forEach(testData.audiences, function(audience) {
audience.conditions = audience.conditions;
audience.conditions = JSON.parse(audience.conditions);
});

assert.strictEqual(configObj.accountId, testData.accountId);
assert.strictEqual(configObj.projectId, testData.projectId);
assert.strictEqual(configObj.revision, testData.revision);
assert.deepEqual(configObj.events, testData.events);
assert.deepEqual(configObj.audiences, testData.audiences);
testData.groups.forEach(function(group) {
group.experiments.forEach(function(experiment) {
experiment.groupId = group.id;
experiment.variationKeyMap = fns.keyBy(experiment.variations, 'key');
});
});
assert.deepEqual(configObj.groups, testData.groups);

var expectedGroupIdMap = {
Expand Down Expand Up @@ -170,6 +175,13 @@ describe('lib/core/project_config', function() {
assert.deepEqual(configObj.variationIdMap, expectedVariationIdMap);
});

it('should not mutate the datafile', function() {
var datafile = testDatafile.getTypedAudiencesConfig();
var datafileClone = cloneDeep(datafile);
projectConfig.createProjectConfig(datafile);
assert.deepEqual(datafileClone, datafile);
});

describe('feature management', function() {
var configObj;
beforeEach(function() {
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22 changes: 22 additions & 0 deletions packages/optimizely-sdk/lib/optimizely/index.tests.js
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Original file line number Diff line number Diff line change
Expand Up @@ -245,6 +245,28 @@ describe('lib/optimizely', function() {
});
});
});

it('should support constructing two instances using the same datafile object', function() {
var datafile = testData.getTypedAudiencesConfig();
var optlyInstance = new Optimizely({
clientEngine: 'node-sdk',
datafile: datafile,
errorHandler: stubErrorHandler,
eventDispatcher: stubEventDispatcher,
jsonSchemaValidator: jsonSchemaValidator,
logger: createdLogger,
});
assert.instanceOf(optlyInstance, Optimizely);
var optlyInstance2 = new Optimizely({
clientEngine: 'node-sdk',
datafile: datafile,
errorHandler: stubErrorHandler,
eventDispatcher: stubEventDispatcher,
jsonSchemaValidator: jsonSchemaValidator,
logger: createdLogger,
});
assert.instanceOf(optlyInstance2, Optimizely);
});
});
});

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0