Add time in seconds convert to human readable format

test-run/string_handling/timestamp_strings.py

@@ -4,7 +4,9 @@
 timestamp string checks
 """
 
-from corelibs.string_handling.timestamp_strings import convert_to_seconds, TimeParseError, TimeUnitError
+from corelibs.string_handling.timestamp_strings import (
+    seconds_to_string, convert_to_seconds, TimeParseError, TimeUnitError
+)
 
 
 def main() -> None:
@@ -21,10 +23,9 @@ def main() -> None:
         "1d 12h",          # 1 day, 12 hours
         "3M 2d 4h",        # 3 months, 2 days, 4 hours
         "45s",             # 45 seconds
-        "1 year 2 months", # 1 year, 2 months
+        "1 year 2 months",  # 1 year, 2 months
         "2Y 6M 15d 8h 30m 45s",  # Complex example
-    # ]
-    # invalid_test_cases = [
+        # invalid tests
         "5M 6d 2M",        # months appears twice
         "2h 30m 45s 1h",   # hours appears twice
         "1d 2 days",       # days appears twice (short and long form)
@@ -43,10 +44,33 @@ def main() -> None:
     for time_string in test_cases:
         try:
             result = convert_to_seconds(time_string)
-            print(f"{time_string} => {result}")
+            print(f"Human readable to seconds: {time_string} => {result}")
         except (TimeParseError, TimeUnitError) as e:
             print(f"Error encountered for {time_string}: {type(e).__name__}: {e}")
 
+    test_values = [
+        'as is string',
+        -172800.001234,  # -2 days, -0.001234 seconds
+        -90061.789,      # -1 day, -1 hour, -1 minute, -1.789 seconds
+        -3661.456,       # -1 hour, -1 minute, -1.456 seconds
+        -65.123,         # -1 minute, -5.123 seconds
+        -1.5,            # -1.5 seconds
+        -0.001,          # -1 millisecond
+        -0.000001,       # -1 microsecond
+        0,               # 0 seconds
+        0.000001,        # 1 microsecond
+        0.001,           # 1 millisecond
+        1.5,             # 1.5 seconds
+        65.123,          # 1 minute, 5.123 seconds
+        3661.456,        # 1 hour, 1 minute, 1.456 seconds
+        90061.789,       # 1 day, 1 hour, 1 minute, 1.789 seconds
+        172800.001234    # 2 days, 0.001234 seconds
+    ]
+
+    for time_value in test_values:
+        result = seconds_to_string(time_value, show_microseconds=True)
+        print(f"Seconds to human readable: {time_value} => {result}")
+
 
 if __name__ == "__main__":
     main()