Added tests 1, 2, 3

Author: javadev

README.md

@@ -1,5 +1,5 @@
 import unittest
-from Solution import Solution
+from Solution0001 import Solution
 
 class TestSolution(unittest.TestCase):
     def test_twoSum(self):

src/main/python/g0001_0100/s0001_two_sum/Solution.py renamed to src/main/python/g0001_0100/s0001_two_sum/Solution0001.py

@@ -3,6 +3,13 @@
 # #Top_Interview_150_Linked_List #Big_O_Time_O(max(N,M))_Space_O(max(N,M))
 # #AI_can_be_used_to_solve_the_task #2025_07_22_Time_0_ms_(100.00%)_Space_17.84_MB_(56.69%)
 
+from typing import Optional
+
+class ListNode:
+    def __init__(self, val=0, next=None):
+        self.val = val
+        self.next = next
+
 # Definition for singly-linked list.
 # class ListNode:
 #     def __init__(self, val=0, next=None):

src/main/python/g0001_0100/s0001_two_sum/Solution_test.py renamed to src/main/python/g0001_0100/s0001_two_sum/Solution0001_test.py

@@ -0,0 +1,38 @@
+import unittest
+from Solution0002 import Solution, ListNode
+
+def construct_linked_list(arr):
+    if not arr:
+        return None
+    head = ListNode(arr[0])
+    curr = head
+    for val in arr[1:]:
+        curr.next = ListNode(val)
+        curr = curr.next
+    return head
+
+def linked_list_to_str(node):
+    vals = []
+    while node:
+        vals.append(str(node.val))
+        node = node.next
+    return ', '.join(vals)
+
+class TestSolution(unittest.TestCase):
+    def test_addTwoNumbers(self):
+        listNode1 = construct_linked_list([2, 4, 3])
+        listNode2 = construct_linked_list([5, 6, 4])
+        result = Solution().addTwoNumbers(listNode1, listNode2)
+        self.assertEqual(linked_list_to_str(result), "7, 0, 8")
+
+    def test_addTwoNumbers2(self):
+        listNode1 = ListNode(0)
+        listNode2 = ListNode(0)
+        result = Solution().addTwoNumbers(listNode1, listNode2)
+        self.assertEqual(linked_list_to_str(result), "0")
+
+    def test_addTwoNumbers3(self):
+        listNode1 = construct_linked_list([9, 9, 9, 9, 9, 9, 9])
+        listNode2 = construct_linked_list([9, 9, 9, 9])
+        result = Solution().addTwoNumbers(listNode1, listNode2)
+        self.assertEqual(linked_list_to_str(result), "8, 9, 9, 9, 0, 0, 0, 1")

src/main/python/g0001_0100/s0002_add_two_numbers/Solution.py renamed to src/main/python/g0001_0100/s0002_add_two_numbers/Solution0002.py

@@ -0,0 +1,12 @@
+import unittest
+from Solution0003 import Solution
+
+class TestSolution(unittest.TestCase):
+    def test_lengthOfLongestSubstring(self):
+        self.assertEqual(Solution().lengthOfLongestSubstring("abcabcbb"), 3)
+
+    def test_lengthOfLongestSubstring2(self):
+        self.assertEqual(Solution().lengthOfLongestSubstring("bbbbb"), 1)
+
+    def test_lengthOfLongestSubstring3(self):
+        self.assertEqual(Solution().lengthOfLongestSubstring("pwwkew"), 3)