updates function and tests file

src/hexdropper/rgb_to_hex.py

@@ -28,4 +28,18 @@ def rgb_to_hex(r, g, b):
     >>> rgb_to_hex(0, 0, 255)
     '0000FF'  # Blue color
     """
-    return None
+    # Helper function to convert a single color value
+    def convert_color(color):
+        quotient = color // 16
+        remainder = int((color / 16 - quotient) * 16)
+        return quotient, remainder
+
+    # Convert each color and concatenate
+    rx, ry = convert_color(r)
+    gx, gy = convert_color(g)
+    bx, by = convert_color(b)
+
+    # Format string to ensure two characters for each color component
+    return "#{:X}{:X}{:X}{:X}{:X}{:X}".format(rx, ry, gx, gy, bx, by)
+
+

tests/test_rgb_to_hex.py

@@ -0,0 +1,30 @@
+import sys
+import os
+sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
+from src.hexdropper.rgb_to_hex import rgb_to_hex
+
+def test_standard_colors():
+    assert rgb_to_hex(255, 0, 0) == '#FF0000'
+    assert rgb_to_hex(0, 255, 0) == '#00FF00'
+    assert rgb_to_hex(0, 0, 255) == '#0000FF'
+
+def test_boundary_values():
+    assert rgb_to_hex(0, 0, 0) == '#000000'
+    assert rgb_to_hex(255, 255, 255) == '#FFFFFF'
+
+def test_specific_case():
+    assert rgb_to_hex(76, 150, 29) == '#4C961D'
+
+def test_edge_cases():
+    assert rgb_to_hex(15, 15, 15) == '#0F0F0F'
+    assert rgb_to_hex(16, 16, 16) == '#101010'
+
+def run_tests():
+    test_standard_colors()
+    test_boundary_values()
+    test_specific_case()
+    test_edge_cases()
+    print("All tests passed!")
+
+if __name__ == "__main__":
+    run_tests()