add Config::version

Author: jcupitt

CHANGELOG.md

@@ -7,6 +7,7 @@ All notable changes to `:vips` will be documented in this file.
 - add Image::newInterpolator() [Kleis Auke Wolthuizen]
 - implement array access interface [John Cupitt]
 - add BlendMode and Image::composite [John Cupitt]
+- add Config::version() [John Cupitt]
 
 ### Deprecated
 - Nothing

src/Config.php

@@ -139,6 +139,17 @@ public static function concurrencySet($value)
     {
         vips_concurrency_set($value);
     }
+
+    /**
+     * Gets the libvips version number as a atring of the form
+     * MAJOR.MINOR.MICRO, for example "8.6.1".
+     *
+     * @return string
+     */
+    public static function version()
+    {
+        return vips_version();
+    }
 }
 
 /*

tests/ConfigTest.php

@@ -28,6 +28,12 @@ public function testVipsConcurrencySet()
     {
         Vips\Config::concurrencySet(12);
     }
+
+    public function testVipsVersion()
+    {
+        $version = Vips\Config::version();
+        $this->assertEquals(preg_match("/\d+\.\d+\.\d+/", $version), 1);
+    }
 }
 
 /*

tests/ConvenienceTest.php

@@ -47,7 +47,6 @@ public function testVipsComposite()
         $overlay = $this->image->add(20)->bandjoin(128);
         $overlay = $overlay->cast(Vips\BandFormat::UCHAR);
         $comp = $this->image->composite($overlay, Vips\BlendMode::OVER);
-        $comp = $this->image->composite($overlay, 99);
 
         $this->assertEquals($comp->getpoint(0, 0)[0], $this->pixel[0] + 10);
     }