Feature: Implement Robust Prime Number Checker

requirements.txt

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+pytest

src/prime_checker.py

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+def is_prime(number):
+    """
+    Check if a given number is prime.
+
+    Args:
+        number (int): The number to check for primality.
+
+    Returns:
+        bool: True if the number is prime, False otherwise.
+
+    Raises:
+        TypeError: If the input is not an integer.
+        ValueError: If the input is negative.
+    """
+    # Check input type
+    if not isinstance(number, int):
+        raise TypeError("Input must be an integer")
+
+    # Handle special cases
+    if number < 0:
+        raise ValueError("Input must be a non-negative integer")
+
+    # 0 and 1 are not prime
+    if number < 2:
+        return False
+
+    # Check for divisibility up to square root of the number
+    for i in range(2, int(number**0.5) + 1):
+        if number % i == 0:
+            return False
+
+    return True

tests/test_prime_checker.py

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+import pytest
+from src.prime_checker import is_prime
+
+def test_prime_numbers():
+    """Test known prime numbers."""
+    prime_numbers = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29]
+    for num in prime_numbers:
+        assert is_prime(num) is True, f"{num} should be prime"
+
+def test_non_prime_numbers():
+    """Test known non-prime numbers."""
+    non_prime_numbers = [0, 1, 4, 6, 8, 9, 10, 12, 14, 15]
+    for num in non_prime_numbers:
+        assert is_prime(num) is False, f"{num} should not be prime"
+
+def test_large_prime():
+    """Test a larger prime number."""
+    assert is_prime(997) is True, "997 is a prime number"
+
+def test_large_non_prime():
+    """Test a larger non-prime number."""
+    assert is_prime(1000) is False, "1000 is not a prime number"
+
+def test_invalid_input_types():
+    """Test handling of invalid input types."""
+    with pytest.raises(TypeError):
+        is_prime("not a number")
+    with pytest.raises(TypeError):
+        is_prime(3.14)
+    with pytest.raises(TypeError):
+        is_prime(None)
+
+def test_negative_numbers():
+    """Test handling of negative numbers."""
+    with pytest.raises(ValueError):
+        is_prime(-7)
+    with pytest.raises(ValueError):
+        is_prime(-17)