compiler: record basic debug info

Save info about method's byte-code sections.

pkg/compiler/debug_test.go

@@ -0,0 +1,43 @@
+package compiler
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neo-go/pkg/internal/testserdes"
+)
+
+func TestDebugInfo_MarshalJSON(t *testing.T) {
+	d := &DebugInfo{
+		EntryPoint: "main",
+		Documents:  []string{"/path/to/file"},
+		Methods: []MethodDebugInfo{
+			{
+				ID: "id1",
+				Name: DebugMethodName{
+					Namespace: "default",
+					Name:      "method1",
+				},
+				Range: DebugRange{Start: 10, End: 20},
+				Parameters: []DebugParam{
+					{"param1", "Integer"},
+					{"ok", "Boolean"},
+				},
+				ReturnType: "ByteArray",
+				Variables:  []string{},
+				SeqPoints: []DebugSeqPoint{
+					{
+						Opcode:    123,
+						Document:  1,
+						StartLine: 2,
+						StartCol:  3,
+						EndLine:   4,
+						EndCol:    5,
+					},
+				},
+			},
+		},
+		Events: []EventDebugInfo{},
+	}
+
+	testserdes.MarshalUnmarshalJSON(t, d, new(DebugInfo))
+}