From dc04336f5d1c9581b7e5bcc9bde2cc1e1c750051 Mon Sep 17 00:00:00 2001
From: Martin Czygan <martin.czygan@gmail.com>
Date: Wed, 12 Aug 2020 11:56:01 +0200
Subject: add tests

---
 tests/test_utils.py | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 tests/test_utils.py

diff --git a/tests/test_utils.py b/tests/test_utils.py
new file mode 100644
index 0000000..ed206dd
--- /dev/null
+++ b/tests/test_utils.py
@@ -0,0 +1,115 @@
+# coding: utf-8
+
+from typing import List, NamedTuple
+import pytest
+
+from fuzzycat.utils import *
+
+
+def test_extract_issns():
+    Case = NamedTuple("Case", [("s", str), ("result", List[str])])
+    cases = (
+        Case("", []),
+        Case("Hello 1234", []),
+        Case("Hello 1084-5100 World", ["1084-5100"]),
+        Case("Hello 10845100 World", []),
+        Case("Hello 1084-5100 1084-5100 World", ["1084-5100", "1084-5100"]),
+        Case("2323-573X 2169-1886 Journal", ["2323-573X", "2169-1886"]),
+    )
+    for c in cases:
+        result = extract_issns(c.s)
+        assert result == c.result
+
+
+def test_longest_common_prefix():
+    Case = NamedTuple("Case", [("a", str), ("b", str), ("result", str)])
+    cases = (
+        Case("", "", ""),
+        Case("a", "", ""),
+        Case("ab", "a", "a"),
+        Case("123", "123", "123"),
+    )
+    for c in cases:
+        result = longest_common_prefix(c.a, c.b)
+        assert result == c.result
+
+
+def test_common_prefix_length_ratio():
+    Case = NamedTuple("Case", [("a", str), ("b", str), ("result", float)])
+    cases = (
+        Case("", "", 0.0),
+        Case("a", "", 0.0),
+        Case("Hello World!", "ello", 0.0),
+        Case("ab", "a", 0.5),
+        Case("123", "123", 1.0),
+        Case("1234", "123", 0.75),
+    )
+    for c in cases:
+        result = common_prefix_length_ratio(c.a, c.b)
+        assert result == c.result
+
+
+def test_hamming_distance():
+    Case = NamedTuple("Case", [("a", str), ("b", str), ("result", int)])
+    cases = (
+        Case("", "", 0),
+        Case("a", "a", 0),
+        Case("a", "ab", 1),
+        Case("abc", "cba", 2),
+        Case("1234", "", 4),
+    )
+    for c in cases:
+        result = hamming_distance(c.a, c.b)
+        assert result == c.result
+
+
+def test_is_valid_issn():
+    cases = {
+        "value_error": ("", "1234", "123456", "111122223333", "XXXXXXXX"),
+        "valid": (
+            "0710-4081",
+            "0011-7625",
+            "2268-5901",
+            "1809-0710",
+            "1533-7561",
+            "07104081",
+            "00117625",
+            "22685901",
+            "18090710",
+            "15337561",
+        ),
+        "invalid": (
+            "0710-4080",
+            "0011-7626",
+            "2268-5902",
+            "1809-0709",
+            "1533-7560",
+            "07104080",
+            "00117626",
+            "22685902",
+            "18090709",
+            "15337560",
+        ),
+    }
+    for ve in cases["value_error"]:
+        with pytest.raises(ValueError):
+            is_valid_issn(ve)
+    for v in cases["valid"]:
+        assert is_valid_issn(v) == True
+    for v in cases["invalid"]:
+        assert is_valid_issn(v) == False
+
+
+def test_keys_with_values():
+    Case = NamedTuple("Case", [("d", Dict), ("result", List[Any])])
+    cases = (
+        Case({}, []),
+        Case({"a": "v"}, ["a"]),
+        Case({"a": "", "b": "v"}, ["b"]),
+        Case({"a": None, "b": "v"}, ["b"]),
+        Case({"a": [], "b": "v"}, ["b"]),
+        Case({"a": 0, "b": "v"}, ["b"]),
+    )
+    for case in cases:
+        result = keys_with_values(case.d)
+        assert result == case.result
-- 
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