Add collection conditions

[leonard84]

resolves #1372

[codecov]

Codecov Report

Merging #1387 (6c8e370) into master (7768079) will increase coverage by 79.28%.
The diff coverage is 75.53%.

@@              Coverage Diff              @@
##             master    #1387       +/-   ##
=============================================
+ Coverage          0   79.28%   +79.28%     
- Complexity        0     3980     +3980     
=============================================
  Files             0      403      +403     
  Lines             0    12391    +12391     
  Branches          0     1638     +1638     
=============================================
+ Hits              0     9824     +9824     
- Misses            0     1971     +1971     
- Partials          0      596      +596     

Impacted Files	Coverage Δ
.../src/main/java/org/spockframework/util/Assert.java	54.54% <ø> (ø)
...g/spockframework/runtime/model/ExpressionInfo.java	72.58% <60.00%> (ø)
.../java/org/spockframework/runtime/SpockRuntime.java	69.78% <68.00%> (ø)
...org/spockframework/compiler/ConditionRewriter.java	91.48% <84.84%> (ø)
...java/org/spockframework/compiler/AstNodeCache.java	100.00% <100.00%> (ø)
...k/runtime/FailedSetEqualityComparisonRenderer.java	96.42% <100.00%> (ø)
...rg/spockframework/runtime/MasterRunSupervisor.java	80.64% <0.00%> (ø)
...untime/extension/builtin/AutoCleanupExtension.java	100.00% <0.00%> (ø)
...a/spock/util/concurrent/BlockingVariablesImpl.java	100.00% <0.00%> (ø)
...g/spockframework/compiler/model/FeatureMethod.java	100.00% <0.00%> (ø)
... and 399 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7768079...6c8e370. Read the comment docs.

[marcphilipp]

Looking forward to using that! 👍