add some tests we'd dropped

jcupitt · jcupitt · commit bf0cba7c86c2 · 2017-08-06T18:16:06.000+01:00
from libvips master
diff --git a/pyvips/tests/test_arithmetic.py b/pyvips/tests/test_arithmetic.py
@@ -546,6 +546,19 @@ def test_measure(self):
             self.assertAlmostEqual(p1, 0)
             self.assertAlmostEqual(p2, 10)
 
+    def test_find_trim(self):
+        im = pyvips.Image.black(50, 60) + 100
+        test = im.embed(10, 20, 200, 300, extend = "white")
+
+        for x in unsigned_formats + float_formats:
+            a = test.cast(x)
+            left, top, width, height = a.find_trim()
+
+            self.assertEqual(left, 10)
+            self.assertEqual(top, 20)
+            self.assertEqual(width, 50)
+            self.assertEqual(height, 60)
+
     def test_profile(self):
         test = pyvips.Image.black(100, 100).draw_rect(100, 40, 50, 1, 1)
 
diff --git a/pyvips/tests/test_iofuncs.py b/pyvips/tests/test_iofuncs.py
@@ -34,5 +34,27 @@ def split(path):
         for case in cases:
             self.assertEqualObjects(split(case[0]), case[1])
 
+    def test_new_from_image(self):
+        im = pyvips.Image.mask_ideal(100, 100, 0.5, 
+                                     reject = True, optical = True)
+
+        im2 = im.new_from_image(12)
+
+        self.assertEqual(im2.width, im.width)
+        self.assertEqual(im2.height, im.height)
+        self.assertEqual(im2.interpretation, im.interpretation)
+        self.assertEqual(im2.format, im.format)
+        self.assertEqual(im2.xres, im.xres)
+        self.assertEqual(im2.yres, im.yres)
+        self.assertEqual(im2.xoffset, im.xoffset)
+        self.assertEqual(im2.yoffset, im.yoffset)
+        self.assertEqual(im2.bands, 1)
+        self.assertEqual(im2.avg(), 12)
+
+        im2 = im.new_from_image([1,2,3])
+
+        self.assertEqual(im2.bands, 3)
+        self.assertEqual(im2.avg(), 2)
+
 if __name__ == '__main__':
     unittest.main()
