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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Guard is a gem I have some prior experience with; it can be configured so that when a change is made to a file (for example: models/user.rb) it will autorun the associated test file (in this example: user_test.rb). As you can imagine, this significantly cuts down on the time until seeing either red or green tests which is super helpful for TDD and a necessary first part of TCR.
Since we use the minitest framework, my work guard setup includes the guard-minitest plugin. Guard supports a great range of plugins; this was another reason it appealed to me compared to solving this problem completely from scratch. I wanted to get something pulled together relatively quickly so I could try this workflow out after all.