1 files changed, 29 insertions, 0 deletions
diff --git a/test/util/image.test.cpp b/test/util/image.test.cpp
index b15ddc1b3f..0cd4a7d8af 100644
--- a/test/util/image.test.cpp
+++ b/test/util/image.test.cpp
@@ -86,6 +86,35 @@ TEST(Image, WebPTile) {
 }
 #endif // !defined(__ANDROID__) && !defined(__APPLE__) && !defined(QT_IMAGE_DECODERS)
 
+TEST(Image, Copy) {
+    PremultipliedImage src5({5, 5});
+    PremultipliedImage dst5({5, 5});
+    PremultipliedImage src10({10, 10});
+    PremultipliedImage dst10({10, 10});
+
+    EXPECT_THROW(PremultipliedImage::copy(src5, dst10, {0, 0}, {0, 0}, {6, 0}), std::out_of_range);
+    EXPECT_THROW(PremultipliedImage::copy(src5, dst10, {0, 0}, {0, 0}, {0, 6}), std::out_of_range);
+    EXPECT_THROW(PremultipliedImage::copy(src5, dst10, {1, 1}, {0, 0}, {5, 0}), std::out_of_range);
+    EXPECT_THROW(PremultipliedImage::copy(src5, dst10, {1, 1}, {0, 0}, {0, 5}), std::out_of_range);
+
+    EXPECT_THROW(PremultipliedImage::copy(src10, dst5, {0, 0}, {0, 0}, {6, 0}), std::out_of_range);
+    EXPECT_THROW(PremultipliedImage::copy(src10, dst5, {0, 0}, {0, 0}, {0, 6}), std::out_of_range);
+    EXPECT_THROW(PremultipliedImage::copy(src10, dst5, {0, 0}, {1, 1}, {5, 0}), std::out_of_range);
+    EXPECT_THROW(PremultipliedImage::copy(src10, dst5, {0, 0}, {1, 1}, {0, 5}), std::out_of_range);
+
+    const uint32_t max = std::numeric_limits<uint32_t>::max();
+
+    EXPECT_THROW(PremultipliedImage::copy(src10, dst10, {max, 0}, {0, 0}, {1, 0}), std::out_of_range);
+    EXPECT_THROW(PremultipliedImage::copy(src10, dst10, {0, max}, {0, 0}, {0, 1}), std::out_of_range);
+    EXPECT_THROW(PremultipliedImage::copy(src10, dst10, {0, 0}, {max, 0}, {1, 0}), std::out_of_range);
+    EXPECT_THROW(PremultipliedImage::copy(src10, dst10, {0, 0}, {0, max}, {0, 1}), std::out_of_range);
+
+    EXPECT_THROW(PremultipliedImage::copy(src10, dst10, {1, 0}, {0, 0}, {max, 0}), std::out_of_range);
+    EXPECT_THROW(PremultipliedImage::copy(src10, dst10, {0, 1}, {0, 0}, {0, max}), std::out_of_range);
+    EXPECT_THROW(PremultipliedImage::copy(src10, dst10, {0, 0}, {1, 0}, {max, 0}), std::out_of_range);
+    EXPECT_THROW(PremultipliedImage::copy(src10, dst10, {0, 0}, {0, 1}, {0, max}), std::out_of_range);
+}
+
 TEST(Image, Premultiply) {
     UnassociatedImage rgba({ 1, 1 });
     rgba.data[0] = 255;