Move the code and data files to math_utils directory.

3 files changed, 22 insertions, 18 deletions

diff --git a/tdd/gcd.py b/tdd/gcd.py
deleted file mode 100644
index 454a719..0000000
--- a/tdd/gcd.py
+++ /dev/null
@@ -1,18 +0,0 @@
-def gcd(a, b):
-    while b != 0:
-        a, b = b, a % b
-    return a
-
-if __name__ == '__main__':
-    for line in open('gcd_testcases.dat'):
-        values = line.split(', ')
-        a = int(values[0])
-        b = int(values[1])
-        g = int(values[2])
-
-        tc = gcd(a, b)
-        if tc != g:
-            print "Test failed for the case a=%d and b=%d. Expected %d. Obtained %d instead." % (a, b, g, tc)
-            exit(1)
-
-    print "All tests passed!"
diff --git a/tdd/math_utils/gcd.py b/tdd/math_utils/gcd.py
new file mode 100644
index 0000000..7204ac0
--- /dev/null
+++ b/tdd/math_utils/gcd.py
@@ -0,0 +1,22 @@
+def gcd(a, b):
+    """Returns the Greatest Common Divisor of the two integers
+    passed as arguments.
+
+    Args:
+      a: an integer
+      b: another integer
+
+    Returns: Greatest Common Divisor of a and b
+
+    >>> gcd(48, 64)
+    16
+    >>> gcd(44, 19)
+    1
+    """
+    if b == 0:
+        return b
+    return gcd(b, a%b)
+
+if __name__ == "__main__":
+    import doctest
+    doctest.testmod()
diff --git a/tdd/gcd_testcases.dat b/tdd/math_utils/gcd_testcases.dat
index 3829b12..3829b12 100644
--- a/tdd/gcd_testcases.dat
+++ b/tdd/math_utils/gcd_testcases.dat