frontend: add tests against XSS

frontend/dn42_test.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"testing"
+)
+
+func TestDN42WhoisFilter(t *testing.T) {
+	input := "name: Testing\ndescr: Description"
+
+	result := dn42WhoisFilter(input)
+
+	expectedResult := `name: Testing
+
+1 line(s) skipped.
+`
+
+	if result != expectedResult {
+		t.Errorf("Output doesn't match expected: %s", result)
+	}
+}
+
+func TestDN42WhoisFilterUnneeded(t *testing.T) {
+	input := "name: Testing\nwhatever: Description"
+
+	result := dn42WhoisFilter(input)
+
+	if result != input+"\n" {
+		t.Errorf("Output doesn't match expected: %s", result)
+	}
+}