1 files changed, 150 insertions, 0 deletions
diff --git a/Tests/designspaceLib/split_test.py b/Tests/designspaceLib/split_test.py
new file mode 100644
index 00000000..8708f704
--- /dev/null
+++ b/Tests/designspaceLib/split_test.py
@@ -0,0 +1,150 @@
+import shutil
+from pathlib import Path
+
+import pytest
+from fontTools.designspaceLib import DesignSpaceDocument
+from fontTools.designspaceLib.split import splitInterpolable, splitVariableFonts, convert5to4
+
+from .fixtures import datadir
+
+UPDATE_REFERENCE_OUT_FILES_INSTEAD_OF_TESTING = False
+
+
+@pytest.mark.parametrize(
+    "test_ds,expected_interpolable_spaces",
+    [
+        (
+            "test_v5_aktiv.designspace",
+            [
+                (
+                    {},
+                    {
+                        "AktivGroteskVF_Italics_Wght",
+                        "AktivGroteskVF_Italics_WghtWdth",
+                        "AktivGroteskVF_Wght",
+                        "AktivGroteskVF_WghtWdth",
+                        "AktivGroteskVF_WghtWdthItal",
+                    },
+                )
+            ],
+        ),
+        (
+            "test_v5_sourceserif.designspace",
+            [
+                (
+                    {"italic": 0},
+                    {"SourceSerif4Variable-Roman"},
+                ),
+                (
+                    {"italic": 1},
+                    {"SourceSerif4Variable-Italic"},
+                ),
+            ],
+        ),
+        (
+            "test_v5_MutatorSans_and_Serif.designspace",
+            [
+                (
+                    {"serif": 0},
+                    {
+                        "MutatorSansVariable_Weight_Width",
+                        "MutatorSansVariable_Weight",
+                        "MutatorSansVariable_Width",
+                    },
+                ),
+                (
+                    {"serif": 1},
+                    {
+                        "MutatorSerifVariable_Width",
+                    },
+                ),
+            ],
+        ),
+    ],
+)
+def test_split(datadir, tmpdir, test_ds, expected_interpolable_spaces):
+    data_in = datadir / test_ds
+    temp_in = Path(tmpdir) / test_ds
+    shutil.copy(data_in, temp_in)
+    doc = DesignSpaceDocument.fromfile(temp_in)
+
+    for i, (location, sub_doc) in enumerate(splitInterpolable(doc)):
+        expected_location, expected_vf_names = expected_interpolable_spaces[i]
+        assert location == expected_location
+        vfs = list(splitVariableFonts(sub_doc))
+        assert expected_vf_names == set(vf[0] for vf in vfs)
+
+        loc_str = "_".join(f"{name}_{value}"for name, value in sorted(location.items()))
+        data_out = datadir / "split_output" / f"{temp_in.stem}_{loc_str}.designspace"
+        temp_out = Path(tmpdir) / "out" / f"{temp_in.stem}_{loc_str}.designspace"
+        temp_out.parent.mkdir(exist_ok=True)
+        sub_doc.write(temp_out)
+
+        if UPDATE_REFERENCE_OUT_FILES_INSTEAD_OF_TESTING:
+            data_out.write_text(temp_out.read_text(encoding="utf-8"), encoding="utf-8")
+        else:
+            assert data_out.read_text(encoding="utf-8") == temp_out.read_text(
+                encoding="utf-8"
+            )
+
+        for vf_name, vf_doc in vfs:
+            data_out = (datadir / "split_output" / vf_name).with_suffix(".designspace")
+            temp_out = (Path(tmpdir) / "out" / vf_name).with_suffix(".designspace")
+            temp_out.parent.mkdir(exist_ok=True)
+            vf_doc.write(temp_out)
+
+            if UPDATE_REFERENCE_OUT_FILES_INSTEAD_OF_TESTING:
+                data_out.write_text(
+                    temp_out.read_text(encoding="utf-8"), encoding="utf-8"
+                )
+            else:
+                assert data_out.read_text(encoding="utf-8") == temp_out.read_text(
+                    encoding="utf-8"
+                )
+
+
+
+
+@pytest.mark.parametrize(
+    "test_ds,expected_vfs",
+    [
+        (
+            "test_v5_aktiv.designspace",
+            {
+                "AktivGroteskVF_Italics_Wght",
+                "AktivGroteskVF_Italics_WghtWdth",
+                "AktivGroteskVF_Wght",
+                "AktivGroteskVF_WghtWdth",
+                "AktivGroteskVF_WghtWdthItal",
+            },
+        ),
+        (
+            "test_v5_sourceserif.designspace",
+            {
+                "SourceSerif4Variable-Italic",
+                "SourceSerif4Variable-Roman",
+            },
+        ),
+    ],
+)
+def test_convert5to4(datadir, tmpdir, test_ds, expected_vfs):
+    data_in = datadir / test_ds
+    temp_in = tmpdir / test_ds
+    shutil.copy(data_in, temp_in)
+    doc = DesignSpaceDocument.fromfile(temp_in)
+
+    variable_fonts = convert5to4(doc)
+
+    assert variable_fonts.keys() == expected_vfs
+    for vf_name, vf in variable_fonts.items():
+        data_out = (datadir / "convert5to4_output" / vf_name).with_suffix(".designspace")
+        temp_out = (Path(tmpdir) / "out" / vf_name).with_suffix(".designspace")
+        temp_out.parent.mkdir(exist_ok=True)
+        vf.write(temp_out)
+
+        if UPDATE_REFERENCE_OUT_FILES_INSTEAD_OF_TESTING:
+            data_out.write_text(temp_out.read_text(encoding="utf-8"), encoding="utf-8")
+        else:
+            assert data_out.read_text(encoding="utf-8") == temp_out.read_text(
+                encoding="utf-8"
+            )