file import/export

tests/files.py

@@ -0,0 +1,28 @@
+import os
+
+import floatimg
+
+def create_img():
+    width, height = 5, 5
+    img = floatimg.create_rgb(width, height)
+    img.fill((255.0, 0.0, 0.0))
+    return img
+
+def test_png():
+    width, height = 5, 5
+    path = "test.png"
+    img = create_img()
+    img.export(path)
+    assert os.path.getsize(path) == 74
+    img2 = floatimg.create_from_png(path)
+    for y in range(height):
+        for x in range(width):
+            assert img.get(x, y) == img2.get(x, y)
+
+    img3 = img2.clone(False)
+    img3.load_png(path)
+    for y in range(height):
+        for x in range(width):
+            assert img.get(x, y) == img3.get(x, y)
+
+