A few small adjustments (macOS-only dependencies and easier debugging of export sub test harness failures)

META6.json

@@ -15,12 +15,12 @@
         "finanalyst aka Richard Hainsworth"
     ],
     "auth": "zef:finanalyst",
-    "depends": {
+    "depends": [{
         "by-kernel.name": {
             "macos": "MacOS::NativeLib:ver<0.0.5>:auth<zef:lizmat>",
             "": ""
         }
-    },
+    }],
     "test-depends": [
         "Test"
     ],
@@ -88,4 +88,4 @@
         "gui"
     ],
     "source-url": "git://github.com/finanalyst/GTK-Simple.git"
-}
+}

t/02-export-subs.rakutest

@@ -1,11 +1,13 @@
-use v6.d;
+use v6.*;
 use Test;
 
 plan *;
 
 use GTK::Simple :subs;
 
 if %*ENV<DISPLAY> or $*DISTRO.is-win {
+    my Str @issues;
+
     # We need to create app first
     my $app;
     lives-ok { $app = app }, "There is a subroutine in scope called 'app'";
@@ -22,10 +24,25 @@ if %*ENV<DISPLAY> or $*DISTRO.is-win {
         next if skip-test($sub-name);
 
         my $widget;
-        lives-ok { $widget = ::{$sub-name}(:label("For Button(s)"), :uri("For LinkButton"), :path("/for/image.png")) },
-        "There is a subroutine in scope called '$sub-name'";
+        lives-ok {
+            $widget =
+                ::{$sub-name}(:label("For Button(s)"),
+                              :uri("For LinkButton"),
+                              :path("/for/image.png"));
+
+            CATCH {
+                @issues.push: "Missing required named argument for '$sub-name' ({$class.^name}) in test constructor";
+            }
+        }, "There is a subroutine in scope called '$sub-name'";
+
         ok $widget ~~ $class, "'$sub-name' returns a { $class.^name } object";
     }
+
+    if @issues {
+        diag "+++ ISSUES WITH EXPORT SUB TEST HARNESS +++";
+        diag @issues.join("\n");
+        diag "+++++++++++++++++++++++++++++++++++++++++++";
+    }
 }
 
 done-testing;