[SUREFIRE-1068] forkNumber in systemPropertyVariables requires prefix

**[Eric Pederson](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=ericacm)** opened **[SUREFIRE-1068](https://issues.apache.org/jira/browse/SUREFIRE-1068?redirect=false)** and commented

The `${surefire.forkNumber}` placeholder cannot be used alone in a `systemPropertyVariable`. The workaround is to prefix the value.

For example, this doesn't work (the `surefire.forkNumber` system property does not exist when running the test).

```xml

${surefire.forkNumber}

```

But this does:

```xml

0${surefire.forkNumber}

```

(note the leading **0**)

---

**Affects:** 2.16

1 votes, 6 watchers

Start by reproducing the two systemPropertyVariables examples described in the issue against Surefire 2.16, comparing the placeholder-only value with the prefixed value. Trace how surefire.forkNumber is resolved and passed into test system properties; done means the placeholder-only form creates the expected system property without requiring a prefix.

Written by the indexing model from the issue text.