Stop tests from failing on machines which don't have Parallel::ForkMa…

…nager,

which fails its own tests on at least some Solaris machines.

.github/workflows/linux-without-parallel-forkmanager.yml

@@ -0,0 +1,29 @@
+on: [push, pull_request]
+name: Linux (build without Parallel::ForkManager)
+
+jobs:
+
+  build:
+    runs-on: 'ubuntu-latest'
+    name: Perl 5.32 build without Parallel::ForkManager
+    steps:
+      - name: check out code
+        uses: actions/checkout@v4
+
+      - name: switch to perl 5.32
+        uses: shogo82148/actions-setup-perl@v1
+        with:
+          perl-version: 5.32
+
+      - name: run tests
+        env:
+          BUILD_TEST: 1
+          PERL_USE_UNSAFE_INC: 0
+        run: |
+            perl -v
+            cpanm --quiet --notest ExtUtils::MakeMaker Test::Pod Test::Pod::Coverage parent
+            cpanm --quiet --notest Data::Dumper::Concise File::ShareDir::Install XML::XPath Data::CompactReadonly File::Find::Rule Spreadsheet::XLSX Text::CSV_XS LWP::Protocol::https
+            cpanm --quiet --notest --installdeps .
+            ./build-data.sh
+            perl Makefile.PL
+            PERL5OPT=-MDevel::Hide=Parallel::ForkManager make test TEST_VERBOSE=1

CHANGELOG

@@ -1,3 +1,8 @@
+X.XXXX    XXXX-XX-XX
+
+- Tests are now forgiving of a missing Parallel::ForkManager
+  (which isn't available on some Solaris machines)
+
 4.0001    2023-12-10
 
 - Clarification in doco re supported perl versions

t/fork.t

@@ -10,11 +10,13 @@ use Test::More;
 
 use Number::Phone::NANP;
 
-use Parallel::ForkManager;
+eval "use Parallel::ForkManager";
 
 SKIP: {
     skip "fork() isn't supported properly on Windows", 3
         if(os_is("MicrosoftWindows"));
+    skip "Parallel::ForkManager needed for these tests", 3
+        unless($INC{'Parallel/ForkManager.pm'});
 
     my $forker = Parallel::ForkManager->new(1);
     my $returned_from_child;