This CL is to address the public static field in RepeatableRunner
for caller to get the current attempt number. We tried to have
a JUnit TestRule to achieve the purpose but it ended up with having
a RuleChain in each class where we already have multiple rules and
need to add the retry rule. This is because we have to make sure
the retry rule is the last one to wrap the test statement so that
the actual retry can include the actions defined in other rules.
Having a rule chain is not scalable and confuses engineer so we
gave it up.
Instead, we decided to expand the current RepeatableRunner to
use reflection to inject the attempt number to the test class.
Doing it this way can reduce the burden from the caller and it also
gets rid of the global state from the previous public static field.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=240789045
This change does a few things:
1. Partially externalized WebDriver tests by using ChromeDriver
as an implementation of WebDriver API in the external build.
2. Refactored WebDriverRule.java to decouple the creation and
using of WebDriver related stuff so we can have different
implementations in internal and external builds.
3. Refactored the usage of some internal libraries to have a
central place to store all of them to make it easier to
remove them in the external build.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=233661757
