Email: make responsive and show header image in MS Outlook (#2138)

src/tests/helpers/test_thumb.py

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+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2020-2021 rami.io GmbH and contributors
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
+# Public License as published by the Free Software Foundation in version 3 of the License.
+#
+# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
+# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
+# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
+# this file, see <https://pretix.eu/about/en/license>.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
+# <https://www.gnu.org/licenses/>.
+#
+from PIL import Image
+
+from pretix.helpers.thumb import resize_image
+
+
+def test_no_resize():
+    img = Image.new('RGB', (40, 20))
+    img = resize_image(img, "100x100")
+    width, height = img.size
+    assert width == 40
+    assert height == 20
+
+    img = Image.new('RGB', (40, 20))
+    img = resize_image(img, "100x100^")
+    width, height = img.size
+    assert width == 40
+    assert height == 20
+
+    img = Image.new('RGB', (40, 20))
+    img = resize_image(img, "10_x20")
+    width, height = img.size
+    assert width == 40
+    assert height == 20
+
+    img = Image.new('RGB', (40, 20))
+    img = resize_image(img, "40x10_")
+    width, height = img.size
+    assert width == 40
+    assert height == 20
+
+
+def test_resize():
+    img = Image.new('RGB', (40, 20))
+    img = resize_image(img, "10x10")
+    width, height = img.size
+    assert width == 10
+    assert height == 5
+
+    img = Image.new('RGB', (40, 20))
+    img = resize_image(img, "100x10")
+    width, height = img.size
+    assert width == 20
+    assert height == 10
+
+    img = Image.new('RGB', (40, 20))
+    img = resize_image(img, "10x100")
+    width, height = img.size
+    assert width == 10
+    assert height == 5
+
+
+def test_crop():
+    img = Image.new('RGB', (40, 20))
+    img = resize_image(img, "10x10^")
+    width, height = img.size
+    assert width == 10
+    assert height == 10
+
+
+def test_minsize():
+    img = Image.new('RGB', (60, 20))
+    img = resize_image(img, "10_x10")
+    width, height = img.size
+    assert width == 30
+    assert height == 10
+
+    img = Image.new('RGB', (10, 20))
+    img = resize_image(img, "10_x10")
+    width, height = img.size
+    assert width == 10
+    assert height == 10
+
+    img = Image.new('RGB', (60, 20))
+    img = resize_image(img, "10x10_")
+    width, height = img.size
+    assert width == 10
+    assert height == 10
+
+    img = Image.new('RGB', (20, 60))
+    img = resize_image(img, "10x10_")
+    width, height = img.size
+    assert width == 10
+    assert height == 30
+
+    img = Image.new('RGB', (20, 60))
+    img = resize_image(img, "10_x10_")
+    width, height = img.size
+    assert width == 10
+    assert height == 30
+
+    img = Image.new('RGB', (20, 60))
+    img = resize_image(img, "100_x100_")
+    width, height = img.size
+    assert width == 100
+    assert height == 100