Fixed Flaky Test: CustomDataParametersTest

[deekshacheruku]

Fixed the flaky test CustomDataParametersTest inside src/test/java/com/facebook/ads/ServerSideTest class.

Root Cause
The test CustomDataParametersTest has been reported as flaky when ran with the NonDex tool. The test failed because it is trying to check if it contains a string or not which is actually nothing but a String Values of List, Hash Map. The HashMap/List in Java is implemented in such a way that it does not store the order in which the keys and/or values are inserted. As a result, when the expected string (which is hard-coded) is compared with the actual one, it failed.

Fix
The simplest fix is to check if all the patterns of expected String in actual String serialisedPayload. Since there were only two possible order changes, it was easy to hardcode the expected patterns and fix the flakiness.

How this has been tested?

Java: openjdk version "11.0.20.1"
Maven: Apache Maven 3.6.3

Module build: Successful
Command used: mvn install -am -DskipTests

Regular test: Successful
Command used: mvn test -Dtest=com.facebook.ads.ServerSideTest#CustomDataParametersTest

NonDex test: Failed
Command used:
mvn edu.illinois:nondex-maven-plugin:2.1.1:nondex -Dtest=com.facebook.ads.ServerSideTest#CustomDataParametersTest

NonDex test passed after the fix.

Let me know if you have any further questions

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