Add number of timeouts in test summary

[il3ven]

This PR adds a line in test summary to indicate the number of tests that failed due to timeout. Fixes #2639.

5 tests remained pending after a timeout

I have modified stats.timeout to represent the number of timed-out tests. I couldn't find what stats.timeout was supposed to represent but I changed it to what I expect from it by looking at the context.

diff --git a/lib/run-status.js b/lib/run-status.js
index a18f4e1af..b6128cda7 100644
--- a/lib/run-status.js
+++ b/lib/run-status.js
@@ -125,7 +125,10 @@ export default class RunStatus extends Emittery {
 			case 'timeout':
 				event.pendingTests = this.pendingTests;
 				this.pendingTests = new Map();
-				stats.timeouts++;
+				for (const [, testsInFile] of event.pendingTests.entries()) {
+					stats.timeouts += testsInFile.size;
+				}
+
 				break;
 			case 'interrupt':
 				event.pendingTests = this.pendingTests;

Sample terminal output

➜  ava-test-timed-out git:(master) ✗ npx ava

  ✔ another test that is simply passing
  
  ✖ Timed out while running tests

  1 tests were pending in test/index_test.js

  ◌ a test that times out

  ─

  1 test passed
  1 test remained pending after a timeout

This output is the result of running https://github.com/TimDaub/ava-test-timed-out/blob/master/test/index_test.js.

[novemberborn]

Great!