Test case name parsing fails if name contains special characters like . or ,

[jk-1]

I have this simplified test object:

package TestExp

object BugTests extends TestSuite{
  val a = true
  val b = true
  val tests =  Tests {
    test("1 foo bar") { assert(a==b) }
    test("2 foo, bar") { assert(a==b) }
    test("3 foo.txt") { assert(a==b) }
  }
}

When I run all tests, they all run OK:

mill show testexplib.test.testOnly -- TestExp.BugTests
[1/1] show > [85/85] testexplib.test.testOnly 
********************     Setting up BugTestFramework     ********************
------------------------ Running Tests TestExp.BugTests ------------------------
+ TestExp.BugTests.1 foo bar 6ms  
+ TestExp.BugTests.2 foo, bar 0ms  
+ TestExp.BugTests.3 foo.txt 0ms  
********************     Tearing down BugTestFramework     ********************
[
  "----------------------------------- Results -----------------------------------\n- TestExp.BugTests  \n\nTests: 3, Passed: 3, Failed: 0",
  [
    {
      "fullyQualifiedName": "TestExp.BugTests",
      "selector": "TestExp.BugTests.1 foo bar",
      "duration": 6,
      "status": "Success"
    },
    {
      "fullyQualifiedName": "TestExp.BugTests",
      "selector": "TestExp.BugTests.2 foo, bar",
      "duration": 0,
      "status": "Success"
    },
    {
      "fullyQualifiedName": "TestExp.BugTests",
      "selector": "TestExp.BugTests.3 foo.txt",
      "duration": 0,
      "status": "Success"
    }
  ]
]

But when I try to run single test cases with '.' or ',' -chars in their name, I get utest.NoSuchTestException -error.

This one runs OK:

mill show testexplib.test.testOnly -- TestExp.BugTests."1 foo bar" 
[1/1] show > [85/85] testexplib.test.testOnly 
********************     Setting up BugTestFramework     ********************
------------------- Running Tests TestExp.BugTests.1 foo bar -------------------
+ TestExp.BugTests.1 foo bar 6ms  
********************     Tearing down BugTestFramework     ********************
[
  "Tests: 1, Passed: 1, Failed: 0",
  [
    {
      "fullyQualifiedName": "TestExp.BugTests",
      "selector": "TestExp.BugTests.1 foo bar",
      "duration": 6,
      "status": "Success"
    }
  ]
]

But these fail:

mill show testexplib.test.testOnly -- TestExp.BugTests."2 foo, bar" 
[1/1] show > [85/85] testexplib.test.testOnly 
********************     Setting up BugTestFramework     ********************
utest.NoSuchTestException: [ bar]
utest.NoSuchTestException: [ bar]
	at utest.runner.BaseRunner.tasks(BaseRunner.scala:73)
	at mill.testrunner.TestRunnerUtils$.runTestFramework0(TestRunnerUtils.scala:123)
	at mill.testrunner.TestRunnerMain0$.main0(TestRunnerMain0.scala:38)
	at mill.testrunner.TestRunnerMain0.main0(TestRunnerMain0.scala)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at mill.testrunner.entrypoint.TestRunnerMain.main(TestRunnerMain.java:42)
1 targets failed
show 1 targets failed
testexplib.test.testOnly Test execution failed.


mill show testexplib.test.testOnly -- TestExp.BugTests."3 foo.txt" 
[1/1] show > [85/85] testexplib.test.testOnly 
********************     Setting up BugTestFramework     ********************
------------------- Running Tests TestExp.BugTests.3 foo.txt -------------------
utest.NoSuchTestException: [3 foo]
utest.NoSuchTestException: [3 foo]
	at utest.TestRunner$.runAsync(TestRunner.scala:60)
	at utest.runner.BaseRunner.runSuite(BaseRunner.scala:173)
	at utest.runner.BaseRunner.$anonfun$makeTask$1(BaseRunner.scala:184)
	at utest.runner.Task.execute(Task.scala:20)
	at mill.testrunner.TestRunnerUtils$.runTestFramework0(TestRunnerUtils.scala:142)
	at mill.testrunner.TestRunnerMain0$.main0(TestRunnerMain0.scala:38)
	at mill.testrunner.TestRunnerMain0.main0(TestRunnerMain0.scala)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at mill.testrunner.entrypoint.TestRunnerMain.main(TestRunnerMain.java:42)
1 targets failed
show 1 targets failed
testexplib.test.testOnly Test execution failed.

Please fix the test case name parsing or add documentation how to escape special characters like '.', ','in test names (there may also be others, I just found these two).

Used uTest is v 0.8.2 and scala v 2.13.12.