fix: std/testing/runner.ts and deno test (#4392)

After splitting "failFast" and "exitOnFail" arguments, there was a situation where failing tests did not exit with code 1.

* fixed argument value passed to Deno.runTests() in deno test
* fixed argument value passed to Deno.runTests() in std/testing/runner.ts
* added integration tests for deno test to ensure failFast and exitOnFail work as expected
* don't write test file to file system, but keep it in memory

1 files changed, 19 insertions, 0 deletions

diff --git a/cli/tests/test_runner_test.ts b/cli/tests/test_runner_test.ts
new file mode 100644
index 000000000..006eca07c
--- /dev/null
+++ b/cli/tests/test_runner_test.ts
@@ -0,0 +1,19 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+import { assert } from "../../std/testing/asserts.ts";
+
+Deno.test(function fail1() {
+  assert(false, "fail1 assertion");
+});
+
+Deno.test(function fail2() {
+  assert(false, "fail2 assertion");
+});
+
+Deno.test(function success1() {
+  assert(true);
+});
+
+Deno.test(function fail3() {
+  assert(false, "fail3 assertion");
+});