1 files changed, 52 insertions, 0 deletions
diff --git a/tests/config/test_validators.py b/tests/config/test_validators.py
new file mode 100644
index 0000000000..7b57a13d5e
--- /dev/null
+++ b/tests/config/test_validators.py
@@ -0,0 +1,52 @@
+from unittest import TestCase
+
+from pydantic import BaseModel, ValidationError, validator, StrictStr
+
+from synapse.config.validators import string_length_between, string_contains_characters
+
+
+class TestValidators(TestCase):
+    def test_string_length_between(self) -> None:
+        class TestModel(BaseModel):
+            x: StrictStr
+            _x_length = validator("x")(string_length_between(5, 10))
+
+        with self.assertRaises(ValidationError):
+            TestModel(x="")
+        with self.assertRaises(ValidationError):
+            TestModel(x="a" * 4)
+
+        # Should not raise:
+        TestModel(x="a" * 5)
+        TestModel(x="a" * 10)
+
+        with self.assertRaises(ValidationError):
+            TestModel(x="a" * 11)
+        with self.assertRaises(ValidationError):
+            TestModel(x="a" * 1000)
+
+    def test_string_contains_characters(self) -> None:
+        class TestModel(BaseModel):
+            x: StrictStr
+            _x_characters = validator("x")(string_contains_characters("A-Z0-9"))
+
+        # Should not raise
+        TestModel(x="")
+        TestModel(x="A")
+        TestModel(x="B")
+        TestModel(x="Z")
+        TestModel(x="123456789")
+
+        with self.assertRaises(ValidationError):
+            TestModel(x="---")
+        with self.assertRaises(ValidationError):
+            TestModel(x="$")
+        with self.assertRaises(ValidationError):
+            TestModel(x="A$")
+        with self.assertRaises(ValidationError):
+            TestModel(x="a")
+        with self.assertRaises(ValidationError):
+            TestModel(x="\u0000")
+        with self.assertRaises(ValidationError):
+            TestModel(x="☃")
+