test: add English ITN unit tests (43 cases)

Author: pengzhendong

itn/english/__init__.py

@@ -0,0 +1,22 @@
+twenty three => 23
+one hundred => 100
+one hundred and one => 101
+two hundred and fifty four => 254
+one thousand => 1000
+one thousand two hundred thirty four => 1234
+eleven hundred => 1100
+twenty one hundred => 2100
+twenty one hundred and eleven => 2111
+ten thousand => 10000
+one hundred thousand => 100000
+one million => 1000000
+one billion => 1000000000
+one trillion => 1000000000000
+one thousand and one => 1001
+one million one => 1000001
+one billion five hundred ninety three million seventy two thousand nine hundred sixty one => 1593072961
+zero => 0
+five => 5
+thirty => 30
+minus forty two => -42
+negative five => -5

itn/english/rules/__init__.py

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+twelve point five => 12.5
+three point one four => 3.14
+minus three point one four => -3.14
+point o five => .05
+point five => .5
+one point zero => 1.0
+zero point five => 0.5
+twenty three point four five six => 23.456

itn/english/test/__init__.py

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+first => 1st
+second => 2nd
+third => 3rd
+fourth => 4th
+fifth => 5th
+eleventh => 11th
+twelfth => 12th
+thirteenth => 13th
+twenty first => 21st
+thirty second => 32nd
+forty third => 43rd
+one hundredth => 100th
+one hundred and first => 101st

itn/english/test/data/en_cardinal.txt

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+# Copyright (c) 2026 Zhendong Peng (pzd17@tsinghua.org.cn)
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from itertools import chain
+
+import pytest
+
+from itn.english.rules.inverse_normalizer import InverseNormalizer
+from itn.english.test.utils import parse_test_case
+
+
+class TestNormalizer:
+
+    normalizer = InverseNormalizer(overwrite_cache=True)
+
+    normalizer_cases = chain(
+        parse_test_case("data/en_cardinal.txt"),
+        parse_test_case("data/en_ordinal.txt"),
+        parse_test_case("data/en_decimal.txt"),
+    )
+
+    @pytest.mark.parametrize("spoken, written", normalizer_cases)
+    def test_normalizer(self, spoken, written):
+        assert self.normalizer.normalize(spoken) == written

itn/english/test/data/en_decimal.txt

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+../../../tn/chinese/test/utils.py