fix defaults for shapes

src/Shapes/Shape.php

@@ -6,11 +6,17 @@
 
 abstract class Shape
 {
-    protected ?Color $background = null;
+    protected Color $background;
 
     protected Color $borderColor;
 
-    protected int $borderWidth = 0;
+    protected int $borderWidth = 1;
+
+    public function __construct()
+    {
+        $this->background = Color::transparent();
+        $this->borderColor = Color::black();
+    }
 
     public function hasBorder(): bool
     {
@@ -20,7 +26,7 @@ public function hasBorder(): bool
     public function border(int $width, Color $color = null): self
     {
         $this->borderWidth = $width;
-        $this->borderColor = $color ?? Color::transparent();
+        $this->borderColor = $color ?? Color::black();
 
         return $this;
     }

tests/DriverTest.php

@@ -476,6 +476,7 @@ function prepare($instance, string $name, Backend $driver, string $ext = 'png'):
             100,
         ], function ($draw) {
             $draw->background(Color::fuchsia());
+            $draw->border(0);
         })
         ->save($out, quality: 100);
 
@@ -485,12 +486,33 @@ function prepare($instance, string $name, Backend $driver, string $ext = 'png'):
     unlink($out);
 })->with('drivers', 'baboon');
 
+it('can draw a polygon on an image with no arguments', function ($driver, $file) {
+    [$out, $expected] = prepare($this, 'baboon_polygon_no_arguments', $driver);
+
+    Image::make($file, $driver)
+        ->polygon([
+            10,
+            10,
+            100,
+            100,
+            10,
+            100,
+        ])
+        ->save($out, quality: 100);
+
+    expect($out)
+        ->toBeFile()
+        ->imageSimilarTo($expected);
+    unlink($out);
+})->with('drivers', 'baboon');
+
 it('can draw a rectangle on an image', function ($driver, $file) {
     [$out, $expected] = prepare($this, 'baboon_rectangle', $driver);
 
     Image::make($file, $driver)
         ->rectangle(10, 30, 100, 100, function ($draw) {
             $draw->background(Color::fuchsia());
+            $draw->border(0);
         })
         ->save($out, quality: 100);