fixed assertions to fetch Exceptions and assert message

inputs/input_invalid.txt

@@ -0,0 +1 @@
+1

nordhealth_test/solution.py

@@ -26,11 +26,12 @@ Pairs : ( 4, 86) ( 23, 67) have sum : 90
 def main() -> None:
     argc = len(sys.argv)
     argv = sys.argv
-    if argc != 2:
-        raise ValueError("Invalid input. You need to provide a single path to the input file. \n Ex.: `./solution.py ./input1.txt`")
     
     # Read input from the file and process the data
     try:
+        if argc != 2:
+            raise ValueError("Invalid input. You need to provide a single path to the input file. \n Ex.: `./solution.py ./input1.txt`")
+
         input_data = read_input(argv[1])
         print_pairs_with_same_sum(input_data)
     except ValueError as e:
@@ -57,7 +58,7 @@ def print_pairs_with_same_sum(arr: List[int]) -> None:
     
     # Not a valid array
     if len(arr) < 2:
-        print("No pairs can be formed from the input file.")
+        raise ValueError("No pairs can be formed from the input file.")
 
     sum_map = defaultdict(list)
     

tests/test_solution.py

@@ -1,4 +1,5 @@
 import sys
+import pytest
 from io import StringIO
 from nordhealth_test.solution import print_pairs_with_same_sum
 
@@ -43,13 +44,15 @@ def test_no_valid_pairs():
 # Test case: Array with exactly one element
 def test_single_element():
     arr = [10]
-    expected_output = "No pairs can be formed from the input file.\n"
-    result = capture_output(print_pairs_with_same_sum, arr)
-    assert result == expected_output
+    expected_output = "No pairs can be formed from the input file."
+    with pytest.raises(ValueError) as val_error:
+        capture_output(print_pairs_with_same_sum, arr)
+    assert str(val_error.value) == expected_output
 
 # Test case: Empty array
 def test_empty_array():
     arr = []
-    expected_output = "No pairs can be formed from the input file.\n"
-    result = capture_output(print_pairs_with_same_sum, arr)
-    assert result == expected_output
+    expected_output = "No pairs can be formed from the input file."
+    with pytest.raises(ValueError) as val_error:
+        capture_output(print_pairs_with_same_sum, arr)
+    assert str(val_error.value) == expected_output