feat(back-end): db connections implemented and created users

backend/src/test/java/com/printcalculator/service/GCodeParserTest.java

@@ -74,4 +74,40 @@ class GCodeParserTest {
 
         tempFile.delete();
     }
+
+    @Test
+    void parse_colonFormattedTime_returnsCorrectStats() throws IOException {
+        File tempFile = File.createTempFile("test_colon", ".gcode");
+        try (FileWriter writer = new FileWriter(tempFile)) {
+            writer.write("; generated by OrcaSlicer\n");
+            writer.write("; print time: 01:02:03\n");
+            writer.write("; filament used [g] = 7.5\n");
+        }
+
+        GCodeParser parser = new GCodeParser();
+        PrintStats stats = parser.parse(tempFile);
+
+        assertEquals(3723L, stats.printTimeSeconds());
+        assertEquals("01:02:03", stats.printTimeFormatted());
+
+        tempFile.delete();
+    }
+
+    @Test
+    void parse_totalEstimatedTimeInline_returnsCorrectStats() throws IOException {
+        File tempFile = File.createTempFile("test_total", ".gcode");
+        try (FileWriter writer = new FileWriter(tempFile)) {
+            writer.write("; generated by OrcaSlicer\n");
+            writer.write("; model printing time: 5m 17s; total estimated time: 5m 21s\n");
+            writer.write("; filament used [g] = 2.0\n");
+        }
+
+        GCodeParser parser = new GCodeParser();
+        PrintStats stats = parser.parse(tempFile);
+
+        assertEquals(321L, stats.printTimeSeconds());
+        assertEquals("5m 21s", stats.printTimeFormatted());
+
+        tempFile.delete();
+    }
 }