Rewrite time_to_seconds, add rspec

Signed-off-by: Vitalii Chulak <vitalii@daynix.com>

lib/auxiliary/time_helper.rb

@@ -4,11 +4,18 @@
 module AutoHCK
   # Helper module
   module Helper
-    def time_to_seconds(time_str)
-      days, time_part = time_str.split('.')
-      hours, minutes, seconds = time_part.split(':').map(&:to_i)
-      total_hours = (days.to_i * 24) + hours
-      (total_hours * 3600) + (minutes * 60) + seconds
+    def time_to_seconds(time_string)
+      match = time_string.match(/^(?:(\d+)\.)?(?:(\d+):)?(\d+)(?::(\d+))?(?:\.(\d+))?$/)
+
+      return 0 unless match
+
+      days = match[1].to_i 
+      hours = match[2].to_i 
+      minutes = match[3].to_i 
+      seconds = match[4].to_i
+      fractional_seconds = "0.#{match[5]}".to_f
+
+      ((days * 24 + hours) * 60 + minutes) * 60 + seconds + fractional_seconds
     end
 
     def seconds_to_time(sec)

spec/lib/auxiliary/test_helper_spec.rb

@@ -0,0 +1,23 @@
+require_relative '../../../lib/auxiliary/time_helper.rb'
+
+RSpec.describe AutoHCK::Helper do
+  include AutoHCK::Helper
+
+  describe '#time_to_seconds' do
+
+    time_strings = {
+      "1:2" => 3720, #hh:mm
+      "1:2:3" => 3723, #hh:mm:ss
+      "1.2:3" => 86400 + 7380, #dd.hh:mm
+      "1.2:3:4" => 86400 + 7380 + 4, #dd.hh:mm:ss
+      "1:2:3.22" => 3723.22, #hh:mm:ss.ff
+      "1.2:3:4.22" => 86400 + 7380 + 4.22, #dd.hh:mm:ss.ff
+    }
+
+    time_strings.each do |time, expected|
+      it "correctly converts '#{time}' to #{expected} seconds" do
+        expect(time_to_seconds(time)).to eq(expected)
+      end
+    end
+  end
+end