TUN-6855: Add DatagramV2Type for IP packet with trace and tracing spans

tracing/identity_test.go

@@ -0,0 +1,52 @@
+package tracing
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestNewIdentity(t *testing.T) {
+	testCases := []struct {
+		testCase string
+		trace    string
+		valid    bool
+	}{
+		{
+			testCase: "full length trace",
+			trace:    "ec31ad8a01fde11fdcabe2efdce36873:52726f6cabc144f5:0:1",
+			valid:    true,
+		},
+		{
+			testCase: "short trace ID",
+			trace:    "ad8a01fde11fdcabe2efdce36873:52726f6cabc144f5:0:1",
+			valid:    true,
+		},
+		{
+			testCase: "no trace",
+			trace:    "",
+			valid:    false,
+		},
+		{
+			testCase: "missing flags",
+			trace:    "ec31ad8a01fde11fdcabe2efdce36873:52726f6cabc144f5:0",
+			valid:    false,
+		},
+		{
+			testCase: "missing separator",
+			trace:    "ec31ad8a01fde11fdcabe2efdce3687352726f6cabc144f501",
+			valid:    false,
+		},
+	}
+
+	for _, testCase := range testCases {
+		identity, err := NewIdentity(testCase.trace)
+		if testCase.valid {
+			require.NoError(t, err, testCase.testCase)
+			require.Equal(t, testCase.trace, identity.String())
+		} else {
+			require.Error(t, err)
+			require.Nil(t, identity)
+		}
+	}
+}