1 files changed, 80 insertions, 0 deletions
diff --git a/Tests/misc/configTools_test.py b/Tests/misc/configTools_test.py
new file mode 100644
index 00000000..94afb233
--- /dev/null
+++ b/Tests/misc/configTools_test.py
@@ -0,0 +1,80 @@
+import dataclasses
+import pytest
+
+from fontTools.misc.configTools import (
+    AbstractConfig,
+    Option,
+    Options,
+    ConfigUnknownOptionError,
+)
+
+
+def test_can_create_custom_config_system():
+    class MyConfig(AbstractConfig):
+        options = Options()
+
+    MyConfig.register_option(
+        "test:option_name",
+        "This is an option",
+        0,
+        int,
+        lambda v: isinstance(v, int),
+    )
+
+    cfg = MyConfig({"test:option_name": "10"}, parse_values=True)
+
+    assert 10 == cfg["test:option_name"]
+
+    # This config is independent from "the" fontTools config
+    with pytest.raises(ConfigUnknownOptionError):
+        MyConfig({"fontTools.otlLib.optimize.gpos:COMPRESSION_LEVEL": 4})
+
+    # Test the repr()
+    assert repr(cfg) == "MyConfig({'test:option_name': 10})"
+
+    # Test the skip_unknown param: just check that the following does not raise
+    MyConfig({"test:unknown": "whatever"}, skip_unknown=True)
+
+    # Test that it raises on unknown option
+    with pytest.raises(ConfigUnknownOptionError):
+        cfg.get("test:unknown")
+
+
+def test_options_are_unique():
+    class MyConfig(AbstractConfig):
+        options = Options()
+
+    opt1 = MyConfig.register_option("test:OPT_1", "", "foo", str, any)
+    cfg = MyConfig({opt1: "bar"})
+    assert cfg[opt1] == "bar"
+
+    opt2 = Option("test:OPT_1", "", "foo", str, any)
+
+    assert dataclasses.asdict(opt1) == dataclasses.asdict(opt2)
+    assert opt1 != opt2
+
+    with pytest.raises(ConfigUnknownOptionError):
+        cfg.get(opt2)
+    with pytest.raises(ConfigUnknownOptionError):
+        cfg.set(opt2, "bar")
+
+
+def test_optional_bool():
+    for v in ("yes", "YES", "Yes", "1", "True", "true", "TRUE"):
+        assert Option.parse_optional_bool(v) is True
+
+    for v in ("no", "NO", "No", "0", "False", "false", "FALSE"):
+        assert Option.parse_optional_bool(v) is False
+
+    for v in ("auto", "AUTO", "Auto", "None", "none", "NONE"):
+        assert Option.parse_optional_bool(v) is None
+
+    with pytest.raises(ValueError, match="invalid optional bool"):
+        Option.parse_optional_bool("foobar")
+
+    assert Option.validate_optional_bool(True)
+    assert Option.validate_optional_bool(False)
+    assert Option.validate_optional_bool(None)
+    assert not Option.validate_optional_bool(1)
+    assert not Option.validate_optional_bool(0)
+    assert not Option.validate_optional_bool("1")