Add summary_output.md doc

docs/summary_output.md

@@ -0,0 +1,64 @@
+# Formatted summary output 
+```
+┌─────────┬──────────────────────┬─────────────────────┐
+│ OUTCOME │      MATRIX ID       │    TEST DETAILS     │
+├─────────┼──────────────────────┼─────────────────────┤
+│ success │ matrix-1z85qtvdnvb0l │ 4 test cases passed │
+└─────────┴──────────────────────┴─────────────────────┘
+```
+
+
+## User scenario
+As a user I want to see finely formatted summary result at the end of execution output.
+
+## Motivation
+Gcloud prints summary output in the table. It looks nice and is readable. Why we wouldn't have same in flank?
+
+## Possible outputs
+Numbers are representing `OUTCOME` column, points are representing `TEST DETAILS` column.
+1. `success | flaky`
+    * `${1} test cases passed | ${2} skipped | ${3} flakes | (Native crash) | ---`
+2. `failure`
+    * `${1} test cases failed | ${2} errors | ${3} passed | ${4} skipped |  ${4} flakes  | (Native crash)`
+    * `Application crashed | (Native crash)`
+    * `Test timed out | (Native crash)`
+    * `App failed to install | (Native crash)`
+    * `Unknown failure | (Native crash)`
+3. `inconclusive`
+    * `Infrastructure failure`
+    * `Test run aborted by user`
+    * `Unknown reason`
+4. `skipped`
+    * `Incompatible device/OS combination`
+    * `App does not support the device architecture`
+    * `App does not support the OS version`
+    * `Unknown reason`
+
+## Implementation details
+
+### Outcome calculation
+It should be mentioned there are some crucial differences how flank and gcloud calculates outcome value.
+
+Gcloud is using following API calls
+1. `self._client.projects_histories_executions_environments.List(request)`
+2. `self._client.projects_histories_executions_steps.List(request)`
+
+The first one is default, but if returns any `environment` without `environmentResult.outcome`, the second one will be used to obtain `steps`. 
+Both `environemnts` and `steps` can provide `outcome`. The difference between them is the `steps` returns `success` event if tests are `flaky`.
+Currently, we don't know why `self._client.projects_histories_executions_environments.List(request)` may return empty `environmentResult.outcome`.
+
+In difference to gcloud flank uses 3 api call to obtain necessary data
+1. `TestMatrix` - `GcTesting.get.projects().testMatrices().get(projectId, testMatrixId)`
+2. `Step` - `toolsResults.projects().histories().executions().steps().get(projectId, historyId, executionId, stepId)`
+3. `ListTestCasesResponse` - `toolsResults.projects().histories().executions().steps().testCases().get(projectId, historyId, executionId, stepId)`
+
+`TestMatrix` from first call provides `ToolResultsStep` through `TestExecution` which is used to obtain arguments for next two calls.  
+
+This is part of flank legacy. Those api calls provides data for `JUnitResult`. 
+As `JUnitResult` contains all data required to generate `table` output, we can reuse it.
+In result, we are forced to calculate `flaky` outcomes on flank site because of `step`.
+Probably it is place for little improvement in the future.
+
+### Test details calculation
+When flank and gcloud implementations can be slightly different because of programming languages,
+the logic behind is the mainly same.

release_notes.md

@@ -3,7 +3,7 @@
 - [#837](https://github.com/Flank/flank/pull/837) Added obfuscate option to dump shards. ([piotradamczyk5](https://github.com/piotradamczyk5))
 - [#868](https://github.com/Flank/flank/pull/868) Restored weblinks to all test results, not just failures. ([rainnapper](https://github.com/rainnapper))
 - [#828](https://github.com/Flank/flank/pull/828) Store test results in gcloud bucket. ([adamfilipow92](https://github.com/adamfilipow92))
-- [#862](https://github.com/Flank/flank/pull/862) Added printing outcome details. ([piotradamczyk5](https://github.com/piotradamczyk5))
+- [#862](https://github.com/Flank/flank/pull/862) Added printing outcome details. ([piotradamczyk5](https://github.com/piotradamczyk5), [jan-gogo](https://github.com/jan-gogo))
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