From 30a97dd5525b6f1b8318e00e0b922e7ef608edd5 Mon Sep 17 00:00:00 2001
From: David Byttow <david.byttow@gmail.com>
Date: Wed, 4 Oct 2017 10:38:57 -0700
Subject: [PATCH] Adds a leak test

---
 leak_test.go | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 leak_test.go

diff --git a/leak_test.go b/leak_test.go
new file mode 100644
index 00000000..6a27b9d8
--- /dev/null
+++ b/leak_test.go
@@ -0,0 +1,112 @@
+package vips_test
+
+import (
+	"sync"
+	"testing"
+
+	"github.com/davidbyttow/govips"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+type size struct {
+	w, h int
+}
+
+var (
+	resizeStrategies = []vips.ResizeStrategy{
+		vips.ResizeStrategyCrop,
+		vips.ResizeStrategyStretch,
+		vips.ResizeStrategyEmbed,
+	}
+	sizes = []size{
+		size{100, 100},
+		size{500, 0},
+		size{0, 500},
+		size{1000, 1000},
+	}
+	formats = []vips.ImageType{
+		vips.ImageTypeJPEG,
+		vips.ImageTypePNG,
+	}
+)
+
+type transform struct {
+	Resize  vips.ResizeStrategy
+	Width   int
+	Height  int
+	Flip    vips.Direction
+	Format  vips.ImageType
+	Zoom    int
+	Blur    float64
+	Kernel  vips.Kernel
+	Interp  vips.Interpolator
+	Quality int
+}
+
+func TestCleanup(t *testing.T) {
+	if testing.Short() {
+		return
+	}
+
+	var transforms []transform
+	for _, resize := range resizeStrategies {
+		for _, size := range sizes {
+			for _, format := range formats {
+				t := transform{
+					Resize:  resize,
+					Width:   size.w,
+					Height:  size.h,
+					Flip:    vips.DirectionHorizontal,
+					Kernel:  vips.KernelLanczos3,
+					Format:  format,
+					Blur:    4,
+					Interp:  vips.InterpolateBicubic,
+					Zoom:    3,
+					Quality: 80,
+				}
+				transforms = append(transforms, t)
+			}
+		}
+	}
+
+	LeakTest(func() {
+		var wg sync.WaitGroup
+		for i, transform := range transforms {
+			wg.Add(1)
+			go func(i int) {
+				defer wg.Done()
+
+				buf, err := vips.NewPipeline().
+					LoadFile("fixtures/canyon.jpg").
+					ResizeStrategy(transform.Resize).
+					Resize(transform.Width, transform.Height).
+					Flip(transform.Flip).
+					Kernel(transform.Kernel).
+					Format(transform.Format).
+					GaussBlur(transform.Blur).
+					Interpolator(transform.Interp).
+					Zoom(transform.Zoom, transform.Zoom).
+					Quality(transform.Quality).
+					Output()
+				require.NoError(t, err)
+
+				image, err := vips.NewImageFromBuffer(buf)
+				require.NoError(t, err)
+				defer image.Close()
+
+				assert.Equal(t, transform.Format, image.Format())
+			}(i)
+		}
+		wg.Wait()
+	})
+}
+
+func LeakTest(fn func()) {
+	vips.Startup(&vips.Config{
+		ConcurrencyLevel: 1,
+	})
+	fn()
+	vips.Shutdown()
+	vips.PrintObjectReport("Finished")
+}