test: snapshot tests for diagrams

tests/safeds/data/tabular/containers/_column/test_plot_boxplot.py

@@ -1,9 +1,12 @@
 import _pytest
 import matplotlib.pyplot as plt
 import pytest
+from safeds.data.image.containers import Image
 from safeds.data.tabular.containers import Table
 from safeds.data.tabular.exceptions import NonNumericColumnError
 
+from tests.helpers import resolve_resource_path
+
 
 def test_plot_boxplot_complex() -> None:
     with pytest.raises(NotImplementedError):  # noqa: PT012
@@ -27,3 +30,12 @@ def test_plot_boxplot_int(monkeypatch: _pytest.monkeypatch) -> None:
     monkeypatch.setattr(plt, "show", lambda: None)
     table = Table.from_dict({"A": [1, 2, 3]})
     table.get_column("A").plot_boxplot()
+
+
+def test_plot_boxplot_legacy() -> None:
+    table = Table.from_dict({"A": [1, 2, 3]})
+    # table.get_column("A").plot_boxplot().to_png_file(resolve_resource_path("./image/snapshot_boxplot.png"))
+    table.get_column("A").plot_boxplot()
+    current = table.get_column("A").plot_boxplot()
+    legacy = Image.from_png_file(resolve_resource_path("./image/snapshot_boxplot.png"))
+    assert legacy._image.tobytes() == current._image.tobytes()

tests/safeds/data/tabular/containers/_column/test_plot_histogram.py

@@ -1,9 +1,28 @@
 import _pytest
 import matplotlib.pyplot as plt
+from safeds.data.image.containers import Image
 from safeds.data.tabular.containers import Table
 
+from tests.helpers import resolve_resource_path
+
 
 def test_plot_histogram(monkeypatch: _pytest.monkeypatch) -> None:
     monkeypatch.setattr(plt, "show", lambda: None)
     table = Table.from_dict({"A": [1, 2, 3]})
     table.get_column("A").plot_histogram()
+
+
+def test_plot_histogram_legacy_check_str() -> None:
+    table = Table.from_dict({"A": ["A", "B", "Apple"]})
+    # table.get_column("A").plot_histogram().to_png_file(resolve_resource_path("./image/snapshot_histogram_str.png"))
+    current = table.get_column("A").plot_histogram()
+    legacy = Image.from_png_file(resolve_resource_path("./image/snapshot_histogram_str.png"))
+    assert legacy._image.tobytes() == current._image.tobytes()
+
+
+def test_plot_histogram_legacy_check_numeric() -> None:
+    table = Table.from_dict({"A": [1, 2, 3]})
+    # table.get_column("A").plot_histogram().to_png_file(resolve_resource_path("./image/snapshot_histogram_numeric.png"))
+    current = table.get_column("A").plot_histogram()
+    legacy = Image.from_png_file(resolve_resource_path("./image/snapshot_histogram_numeric.png"))
+    assert legacy._image.tobytes() == current._image.tobytes()

tests/safeds/data/tabular/containers/_table/test_plot_correlation_heatmap.py

@@ -1,7 +1,10 @@
 import _pytest
 import matplotlib.pyplot as plt
+from safeds.data.image.containers import Image
 from safeds.data.tabular.containers import Table
 
+from tests.helpers import resolve_resource_path
+
 
 def test_plot_correlation_heatmap_non_numeric(monkeypatch: _pytest.monkeypatch) -> None:
     monkeypatch.setattr(plt, "show", lambda: None)
@@ -13,3 +16,11 @@ def test_plot_correlation_heatmap(monkeypatch: _pytest.monkeypatch) -> None:
     monkeypatch.setattr(plt, "show", lambda: None)
     table = Table.from_dict({"A": [1, 2, 3.5], "B": [2, 4, 7]})
     table.plot_correlation_heatmap()
+
+
+def test_plot_heatmap_legacy_check() -> None:
+    table = Table.from_dict({"A": [1, 2, 3.5], "B": [0.2, 4, 77]})
+    # table.plot_correlation_heatmap().to_png_file(resolve_resource_path("./image/snapshot_heatmap.png"))
+    current = table.plot_correlation_heatmap()
+    legacy = Image.from_png_file(resolve_resource_path("./image/snapshot_heatmap.png"))
+    assert legacy._image.tobytes() == current._image.tobytes()

tests/safeds/data/tabular/containers/_table/test_plot_lineplot.py

@@ -1,9 +1,12 @@
 import _pytest
 import matplotlib.pyplot as plt
 import pytest
+from safeds.data.image.containers import Image
 from safeds.data.tabular.containers import Table
 from safeds.data.tabular.exceptions import UnknownColumnNameError
 
+from tests.helpers import resolve_resource_path
+
 
 def test_plot_lineplot(monkeypatch: _pytest.monkeypatch) -> None:
     monkeypatch.setattr(plt, "show", lambda: None)
@@ -15,3 +18,11 @@ def test_plot_lineplot_wrong_column_name() -> None:
     table = Table.from_dict({"A": [1, 2, 3], "B": [2, 4, 7]})
     with pytest.raises(UnknownColumnNameError):
         table.plot_lineplot("C", "A")
+
+
+def test_plot_lineplot_legacy_check() -> None:
+    table = Table.from_dict({"A": [1, 2, 3], "B": [2, 4, 7]})
+    # table.plot_lineplot("A", "B").to_png_file(resolve_resource_path("./image/snapshot_lineplot.png"))
+    current = table.plot_lineplot("A", "B")
+    legacy = Image.from_png_file(resolve_resource_path("./image/snapshot_lineplot.png"))
+    assert legacy._image.tobytes() == current._image.tobytes()

tests/safeds/data/tabular/containers/_table/test_plot_scatterplot.py

@@ -1,9 +1,12 @@
 import _pytest
 import matplotlib.pyplot as plt
 import pytest
+from safeds.data.image.containers import Image
 from safeds.data.tabular.containers import Table
 from safeds.data.tabular.exceptions import UnknownColumnNameError
 
+from tests.helpers import resolve_resource_path
+
 
 def test_plot_scatterplot(monkeypatch: _pytest.monkeypatch) -> None:
     monkeypatch.setattr(plt, "show", lambda: None)
@@ -15,3 +18,11 @@ def test_plot_scatterplot_wrong_column_name() -> None:
     table = Table.from_dict({"A": [1, 2, 3], "B": [2, 4, 7]})
     with pytest.raises(UnknownColumnNameError):
         table.plot_scatterplot("C", "A")
+
+
+def test_plot_scatterplot_legacy_check() -> None:
+    table = Table.from_dict({"A": [1, 2, 3], "B": [2, 4, 7]})
+    # table.plot_scatterplot("A", "B").to_png_file(resolve_resource_path("./image/snapshot_scatterplot.png"))
+    current = table.plot_scatterplot("A", "B")
+    legacy = Image.from_png_file(resolve_resource_path("./image/snapshot_scatterplot.png"))
+    assert legacy._image.tobytes() == current._image.tobytes()