added tests

tests/test_card.py

@@ -0,0 +1,52 @@
+import pytest
+
+from pyjack.card import Card
+
+
+@pytest.fixture
+def cards():
+    cards = [
+        Card("diamonds", "2"),
+        Card("hearts", "A"),
+        Card("clubs", "9"),
+        Card("spades", "Q"),
+    ]
+    return cards
+
+
+@pytest.fixture
+def expected_values():
+    values = [2, 11, 9, 10]
+    return values
+
+
+@pytest.fixture
+def expected_strings():
+    strings = [
+        "2 of diamonds",
+        "A of hearts",
+        "9 of clubs",
+        "Q of spades",
+    ]
+    return strings
+
+
+def test_get_value(cards, expected_values):
+    """tests if the correct value is returned by the function"""
+    results = []
+    for card in cards:
+        results.append(card.get_value())
+
+    # The zip() function takes multiple iterable objects (like lists
+    # or tuples) and combines them element-wise, creating an iterator
+    # of tuples. Each tuple contains one element from each input
+    # iterable at the corresponding index.
+    # It effectively allows for parallel iteration.
+    for expected_value, result in zip(expected_values, results):
+        assert expected_value == result
+
+
+def test_default_return_value(cards, expected_strings):
+    """Tests if the __str__ method returns the correct value"""
+
+    assert expected_strings == [card.__str__() for card in cards]