From 133a7eace158415d388a0d6b65c68ec5839e71a8 Mon Sep 17 00:00:00 2001
From: jxnior01 <atemebangashu@gmail.com>
Date: Fri, 16 Jun 2023 11:40:50 +0200
Subject: [PATCH 1/8] added method + test to convert image to grayscale

---
 src/safeds/data/image/containers/_image.py      | 17 +++++++++++++++++
 .../safeds/data/image/containers/test_image.py  | 13 +++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/src/safeds/data/image/containers/_image.py b/src/safeds/data/image/containers/_image.py
index d122d06c8..27d33936e 100644
--- a/src/safeds/data/image/containers/_image.py
+++ b/src/safeds/data/image/containers/_image.py
@@ -176,3 +176,20 @@ def resize(self, new_width: int, new_height: int) -> Image:
         new_image = Image(data, self._format)
         new_image._image = new_image._image.resize((new_width, new_height))
         return new_image
+
+    def convert_to_grayscale(self) -> Image:
+        """
+        Convert the image to grayscale.
+
+        Returns
+        -------
+        grayscale_image : Image
+            The grayscale image.
+        """
+        data = io.BytesIO()
+        grayscale_image = self._image.convert("L")
+        grayscale_image.save(data, format=self._format.value)
+        return Image(data, self._format)
+
+
+
diff --git a/tests/safeds/data/image/containers/test_image.py b/tests/safeds/data/image/containers/test_image.py
index e4b0a87c9..1a6d41da4 100644
--- a/tests/safeds/data/image/containers/test_image.py
+++ b/tests/safeds/data/image/containers/test_image.py
@@ -181,3 +181,16 @@ def test_should_return_resized_image(
         new_size: tuple[int, int],
     ) -> None:
         assert image.resize(new_width, new_height)._image.size == new_size
+
+
+class TestConvertToGrayscale:
+    @pytest.mark.parametrize(
+        "image",
+        [
+            (Image.from_png_file(resolve_resource_path("image/snapshot_heatmap.png")))
+        ],
+        ids=["grayscale"],
+    )
+    def test_convert_to_grayscale(self, image: Image) -> None:
+        grayscale_image = image.convert_to_grayscale()
+        assert grayscale_image._image.mode == "L"

From b916bf40fb3061f21fd077bb4eecf5f3fe54cff4 Mon Sep 17 00:00:00 2001
From: jxnior01 <atemebangashu@gmail.com>
Date: Fri, 16 Jun 2023 14:13:49 +0200
Subject: [PATCH 2/8] modified grayscale_test and added resulting image

---
 .../image/snapshot_heatmap_grayscale.png        | Bin 0 -> 11217 bytes
 .../safeds/data/image/containers/test_image.py  |  11 +++++++----
 2 files changed, 7 insertions(+), 4 deletions(-)
 create mode 100644 tests/resources/image/snapshot_heatmap_grayscale.png

diff --git a/tests/resources/image/snapshot_heatmap_grayscale.png b/tests/resources/image/snapshot_heatmap_grayscale.png
new file mode 100644
index 0000000000000000000000000000000000000000..ca7f451c0019b372982c63e43d1d0a00e9de62ba
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literal 0
HcmV?d00001

diff --git a/tests/safeds/data/image/containers/test_image.py b/tests/safeds/data/image/containers/test_image.py
index 1a6d41da4..7134b323c 100644
--- a/tests/safeds/data/image/containers/test_image.py
+++ b/tests/safeds/data/image/containers/test_image.py
@@ -185,12 +185,15 @@ def test_should_return_resized_image(
 
 class TestConvertToGrayscale:
     @pytest.mark.parametrize(
-        "image",
+        ("image", "expected"),
         [
-            (Image.from_png_file(resolve_resource_path("image/snapshot_heatmap.png")))
+            (Image.from_png_file(resolve_resource_path("image/snapshot_heatmap.png")),
+             Image.from_png_file(resolve_resource_path("image/snapshot_heatmap_grayscale.png"))),
         ],
         ids=["grayscale"],
     )
-    def test_convert_to_grayscale(self, image: Image) -> None:
+    def test_convert_to_grayscale(self, image: Image, expected: Image) -> None:
         grayscale_image = image.convert_to_grayscale()
-        assert grayscale_image._image.mode == "L"
+        assert grayscale_image._image.tobytes() == expected._image.tobytes()
+
+

From 1efa7e52be31c38322de49f8cf19976a67473434 Mon Sep 17 00:00:00 2001
From: jxnior01 <atemebangashu@gmail.com>
Date: Fri, 16 Jun 2023 14:44:52 +0200
Subject: [PATCH 3/8] resolving conflicts

---
 src/safeds/data/image/containers/_image.py       | 15 +++++++++++++++
 tests/safeds/data/image/containers/test_image.py | 14 ++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/src/safeds/data/image/containers/_image.py b/src/safeds/data/image/containers/_image.py
index 2c3659859..05848d963 100644
--- a/src/safeds/data/image/containers/_image.py
+++ b/src/safeds/data/image/containers/_image.py
@@ -221,6 +221,20 @@ def resize(self, new_width: int, new_height: int) -> Image:
         new_image._image = new_image._image.resize((new_width, new_height))
         return new_image
 
+    def convert_to_grayscale(self) -> Image:
+        """
+        Convert the image to grayscale.
+
+        Returns
+        -------
+        grayscale_image : Image
+            The grayscale image.
+        """
+        data = io.BytesIO()
+        grayscale_image = self._image.convert("L")
+        grayscale_image.save(data, format=self._format.value)
+        return Image(data, self._format)
+
     def flip_vertically(self) -> Image:
         """
         Flip the image vertically (horizontal axis, flips up-down and vice versa).
@@ -246,3 +260,4 @@ def flip_horizontally(self) -> Image:
         imagecopy = copy.deepcopy(self)
         imagecopy._image = self._image.transpose(PIL.Image.FLIP_LEFT_RIGHT)
         return imagecopy
+
diff --git a/tests/safeds/data/image/containers/test_image.py b/tests/safeds/data/image/containers/test_image.py
index 0b8e09bd6..a95d2db5a 100644
--- a/tests/safeds/data/image/containers/test_image.py
+++ b/tests/safeds/data/image/containers/test_image.py
@@ -206,6 +206,20 @@ def test_should_return_resized_image(
         assert image.resize(new_width, new_height)._image.size == new_size
 
 
+class TestConvertToGrayscale:
+    @pytest.mark.parametrize(
+        ("image", "expected"),
+        [
+            (Image.from_png_file(resolve_resource_path("image/snapshot_heatmap.png")),
+             Image.from_png_file(resolve_resource_path("image/snapshot_heatmap_grayscale.png"))),
+        ],
+        ids=["grayscale"],
+    )
+    def test_convert_to_grayscale(self, image: Image, expected: Image) -> None:
+        grayscale_image = image.convert_to_grayscale()
+        assert grayscale_image._image.tobytes() == expected._image.tobytes()
+
+
 class TestEQ:
     def test_should_be_equal(self) -> None:
         image = Image.from_png_file(resolve_resource_path("image/original.png"))

From 59f206b2ff0ff50a1f1ae9fa35f595b5f8e91518 Mon Sep 17 00:00:00 2001
From: megalinter-bot <129584137+megalinter-bot@users.noreply.github.com>
Date: Fri, 16 Jun 2023 12:47:46 +0000
Subject: [PATCH 4/8] style: apply automated linter fixes

---
 src/safeds/data/image/containers/_image.py       | 1 -
 tests/safeds/data/image/containers/test_image.py | 6 ++++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/safeds/data/image/containers/_image.py b/src/safeds/data/image/containers/_image.py
index 05848d963..714269359 100644
--- a/src/safeds/data/image/containers/_image.py
+++ b/src/safeds/data/image/containers/_image.py
@@ -260,4 +260,3 @@ def flip_horizontally(self) -> Image:
         imagecopy = copy.deepcopy(self)
         imagecopy._image = self._image.transpose(PIL.Image.FLIP_LEFT_RIGHT)
         return imagecopy
-
diff --git a/tests/safeds/data/image/containers/test_image.py b/tests/safeds/data/image/containers/test_image.py
index a95d2db5a..dba8cee54 100644
--- a/tests/safeds/data/image/containers/test_image.py
+++ b/tests/safeds/data/image/containers/test_image.py
@@ -210,8 +210,10 @@ class TestConvertToGrayscale:
     @pytest.mark.parametrize(
         ("image", "expected"),
         [
-            (Image.from_png_file(resolve_resource_path("image/snapshot_heatmap.png")),
-             Image.from_png_file(resolve_resource_path("image/snapshot_heatmap_grayscale.png"))),
+            (
+                Image.from_png_file(resolve_resource_path("image/snapshot_heatmap.png")),
+                Image.from_png_file(resolve_resource_path("image/snapshot_heatmap_grayscale.png")),
+            ),
         ],
         ids=["grayscale"],
     )

From 8aa7e12ed1efdad414fb554bc20290b9f730c470 Mon Sep 17 00:00:00 2001
From: jxnior01 <atemebangashu@gmail.com>
Date: Fri, 16 Jun 2023 15:13:18 +0200
Subject: [PATCH 5/8] code-cov down, maybe new commit needed

---
 tests/safeds/data/image/containers/test_image.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/safeds/data/image/containers/test_image.py b/tests/safeds/data/image/containers/test_image.py
index dba8cee54..d0e3862f7 100644
--- a/tests/safeds/data/image/containers/test_image.py
+++ b/tests/safeds/data/image/containers/test_image.py
@@ -216,6 +216,7 @@ class TestConvertToGrayscale:
             ),
         ],
         ids=["grayscale"],
+
     )
     def test_convert_to_grayscale(self, image: Image, expected: Image) -> None:
         grayscale_image = image.convert_to_grayscale()

From bf29b00c98211aa593c55d9a9402410679dedd91 Mon Sep 17 00:00:00 2001
From: megalinter-bot <129584137+megalinter-bot@users.noreply.github.com>
Date: Fri, 16 Jun 2023 13:15:07 +0000
Subject: [PATCH 6/8] style: apply automated linter fixes

---
 tests/safeds/data/image/containers/test_image.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/tests/safeds/data/image/containers/test_image.py b/tests/safeds/data/image/containers/test_image.py
index d0e3862f7..dba8cee54 100644
--- a/tests/safeds/data/image/containers/test_image.py
+++ b/tests/safeds/data/image/containers/test_image.py
@@ -216,7 +216,6 @@ class TestConvertToGrayscale:
             ),
         ],
         ids=["grayscale"],
-
     )
     def test_convert_to_grayscale(self, image: Image, expected: Image) -> None:
         grayscale_image = image.convert_to_grayscale()

From a493f517107a060d7dca93dbbacaa7f0e9b56e6e Mon Sep 17 00:00:00 2001
From: jxnior01 <atemebangashu@gmail.com>
Date: Fri, 16 Jun 2023 15:31:54 +0200
Subject: [PATCH 7/8] code-cov 100%

---
 src/safeds/data/image/containers/_image.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/safeds/data/image/containers/_image.py b/src/safeds/data/image/containers/_image.py
index 714269359..2237e926e 100644
--- a/src/safeds/data/image/containers/_image.py
+++ b/src/safeds/data/image/containers/_image.py
@@ -195,7 +195,6 @@ def _repr_png_(self) -> bytes | None:
         self._image.save(buffer, format="png")
         buffer.seek(0)
         return buffer.read()
-
     # ------------------------------------------------------------------------------------------------------------------
     # Transformations
     # ------------------------------------------------------------------------------------------------------------------

From 515a4a0fb9f020685c7a96c16b2b4b8bc3ca8968 Mon Sep 17 00:00:00 2001
From: megalinter-bot <129584137+megalinter-bot@users.noreply.github.com>
Date: Fri, 16 Jun 2023 13:35:44 +0000
Subject: [PATCH 8/8] style: apply automated linter fixes

---
 src/safeds/data/image/containers/_image.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/safeds/data/image/containers/_image.py b/src/safeds/data/image/containers/_image.py
index 9312139dc..41309159e 100644
--- a/src/safeds/data/image/containers/_image.py
+++ b/src/safeds/data/image/containers/_image.py
@@ -196,6 +196,7 @@ def _repr_png_(self) -> bytes | None:
         self._image.save(buffer, format="png")
         buffer.seek(0)
         return buffer.read()
+
     # ------------------------------------------------------------------------------------------------------------------
     # Transformations
     # ------------------------------------------------------------------------------------------------------------------
@@ -234,7 +235,7 @@ def convert_to_grayscale(self) -> Image:
         grayscale_image = self._image.convert("L")
         grayscale_image.save(data, format=self._format.value)
         return Image(data, self._format)
-      
+
     def crop(self, x: int, y: int, width: int, height: int) -> Image:
         """
         Return an image that has been cropped to a given bounding rectangle.