No assertions in some generated tests for guava

[sofurihafe]

Description

Some methods in the generated tests have no assertions.

To Reproduce

1. Run contest estimator with the following settings:

timelimit = 160

methodFilter = "com.google.common.collect.FilteredEntryMultimap.*"
projectFilter = listOf("guava")

2. Check generated test methods like testMethod, testRemoveAll and testCreateKeySet, etc.

Expected behavior

Test methods should contain assertions.

Actual behavior

No assertions are being generated.

[EgorkaKulikov]

Not so easy problem, fix should be designed and applied only after the Contest.