How many API keys I need?

Basically you need as many API keys as you have steps in your build.

Here is example:

• Step 1. API_KEY_A for bundle exec rake knapsack_pro:cucumber
• Step 2. API_KEY_B for bundle exec rake knapsack_pro:rspec
• Step 3. API_KEY_C for KNAPSACK_PRO_TEST_FILE_PATTERN="spec/features/*_spec.rb" bundle exec rake knapsack_pro:rspec
• Step 4. API_KEY_D for bundle exec rake knapsack_pro:rspec[--tag tagA]
• Step 5. API_KEY_E for bundle exec rake knapsack_pro:rspec[--tag ~tagA]
• Step 6. API_KEY_F for bundle exec rake knapsack_pro:queue:rspec

Note:

• If you specified KNAPSACK_PRO_TEST_FILE_PATTERN then you run subset of your whole test suite hence you need separate API key because we want to track only tests for this subset.
• If you pass --tag tagA or --tag ~tagA then you run subset of your whole test suite hence you need separate API key.
• If you use regular or queue mode then you need separate API key for each mode.