feat: v6 rewrite

internal/scan/targets_test.go

@@ -0,0 +1,73 @@
+package scan
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestExpandTargetsForScan_ExpandsFullIPv4Range(t *testing.T) {
+	targets := []string{
+		"192.0.2.10-192.0.2.12",
+		"192.168.1.140-255",
+		"192.0.2.0/30",
+		"localhost",
+		"",
+	}
+
+	got, err := expandTargetsForScan(targets)
+	require.NoError(t, err)
+
+	assert.ElementsMatch(t, []string{
+		"192.0.2.10/31",
+		"192.0.2.12",
+		"192.168.1.140-255",
+		"192.0.2.0/30",
+		"localhost",
+	}, got)
+}
+
+func TestExpandTargetsForScan_ReturnsErrorOnInvalidRange(t *testing.T) {
+	t.Run("inverted range", func(t *testing.T) {
+		_, err := expandTargetsForScan([]string{"192.0.2.12-192.0.2.10"})
+		require.Error(t, err)
+		assert.ErrorContains(t, err, "invalid range")
+	})
+
+	t.Run("invalid range", func(t *testing.T) {
+		_, err := expandTargetsForScan([]string{"192.0.2.12-foo"})
+		require.Error(t, err)
+		assert.ErrorContains(t, err, "invalid range")
+	})
+
+	t.Run("hostname with dash", func(t *testing.T) {
+		tgts, err := expandTargetsForScan([]string{"my-host.com"})
+		require.NoError(t, err)
+		assert.Equal(t, []string{"my-host.com"}, tgts)
+	})
+
+	t.Run("ends with dash", func(t *testing.T) {
+		tgts, err := expandTargetsForScan([]string{"a-"})
+		require.NoError(t, err)
+		assert.Equal(t, []string{"a-"}, tgts)
+	})
+
+	t.Run("starts with dash", func(t *testing.T) {
+		tgts, err := expandTargetsForScan([]string{"-a"})
+		require.NoError(t, err)
+		assert.Equal(t, []string{"-a"}, tgts)
+	})
+
+	t.Run("only a dash", func(t *testing.T) {
+		tgts, err := expandTargetsForScan([]string{"-"})
+		require.NoError(t, err)
+		assert.Equal(t, []string{"-"}, tgts)
+	})
+
+	t.Run("nmap format", func(t *testing.T) {
+		tgts, err := expandTargetsForScan([]string{"192.168.1.10-255"})
+		require.NoError(t, err)
+		assert.Equal(t, []string{"192.168.1.10-255"}, tgts)
+	})
+}