feat(web): java from python

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

@@ -0,0 +1,57 @@
+package com.printcalculator.service;
+
+import com.printcalculator.model.PrintStats;
+import org.junit.jupiter.api.Test;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class GCodeParserTest {
+
+    @Test
+    void parse_validGcode_returnsCorrectStats() throws IOException {
+        // Arrange
+        File tempFile = File.createTempFile("test", ".gcode");
+        try (FileWriter writer = new FileWriter(tempFile)) {
+            writer.write("; generated by OrcaSlicer\n");
+            writer.write("; estimated printing time = 1h 2m 3s\n");
+            writer.write("; filament used [g] = 10.5\n");
+            writer.write("; filament used [mm] = 3000.0\n");
+        }
+
+        GCodeParser parser = new GCodeParser();
+
+        // Act
+        PrintStats stats = parser.parse(tempFile);
+
+        // Assert
+        assertEquals(3723, stats.printTimeSeconds()); // 3600 + 120 + 3
+        assertEquals("1h 2m 3s", stats.printTimeFormatted());
+        assertEquals(10.5, stats.filamentWeightGrams(), 0.001);
+        assertEquals(3000.0, stats.filamentLengthMm(), 0.001);
+
+        tempFile.delete();
+    }
+    
+    @Test
+    void parse_footerGcode_returnsCorrectStats() throws IOException {
+        // Arrange
+        File tempFile = File.createTempFile("test_footer", ".gcode");
+        try (FileWriter writer = new FileWriter(tempFile)) {
+            writer.write("; header\n");
+             // ... many lines ...
+            writer.write("; filament used [g] = 5.0\n");
+            writer.write("; estimated printing time = 12m 30s\n");
+        }
+
+        GCodeParser parser = new GCodeParser();
+        PrintStats stats = parser.parse(tempFile);
+
+        assertEquals(750, stats.printTimeSeconds()); // 12*60 + 30
+        assertEquals(5.0, stats.filamentWeightGrams(), 0.001);
+
+        tempFile.delete();
+    }
+}