Implemented operators and better indexing

test/operators_test.go

@@ -0,0 +1,58 @@
+package integration
+
+import (
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/marte-community/marte-dev-tools/internal/builder"
+	"github.com/marte-community/marte-dev-tools/internal/parser"
+)
+
+func TestOperators(t *testing.T) {
+	content := `
+#var A: int = 10
+#var B: int = 20
+#var S1: string = "Hello"
+#var S2: string = "World"
+
++Obj = {
+    Math = $A + $B
+    Precedence = $A + $B * 2
+    Concat = $S1 .. " " .. $S2
+}
+`
+	// Check Parser
+	p := parser.NewParser(content)
+	_, err := p.Parse()
+	if err != nil {
+		t.Fatalf("Parse failed: %v", err)
+	}
+
+	// Check Builder Output
+	f, _ := os.CreateTemp("", "ops.marte")
+	f.WriteString(content)
+	f.Close()
+	defer os.Remove(f.Name())
+
+	b := builder.NewBuilder([]string{f.Name()}, nil)
+
+	outF, _ := os.CreateTemp("", "out.marte")
+	defer os.Remove(outF.Name())
+	b.Build(outF)
+	outF.Close()
+
+	outContent, _ := os.ReadFile(outF.Name())
+	outStr := string(outContent)
+
+	if !strings.Contains(outStr, "Math = 30") {
+		t.Errorf("Math failed. Got:\n%s", outStr)
+	}
+	// 10 + 20 * 2 = 50
+	if !strings.Contains(outStr, "Precedence = 50") {
+		t.Errorf("Precedence failed. Got:\n%s", outStr)
+	}
+	if !strings.Contains(outStr, "Concat = \"Hello World\"") {
+		t.Errorf("Concat failed. Got:\n%s", outStr)
+	}
+}