allErrs = append(allErrs, validateAudiences(issuer.Audiences, issuer.AudienceMatchPolicy, fldPath.Child("audiences"), fldPath.Child("audienceMatchPolicy"))...)
	allErrs = append(allErrs, validateCertificateAuthority(issuer.CertificateAuthority, fldPath.Child("certificateAuthority"))...)

	return allErrs
}

func validateIssuerURL(issuerURL string, disallowedIssuers sets.Set[string], fldPath *field.Path) field.ErrorList {

			},
			want: "",
		},
	}

	for _, tt := range testCases {
		t.Run(tt.name, func(t *testing.T) {
			got := validateCertificateAuthority(tt.in(), fldPath).ToAggregate()
			if d := cmp.Diff(tt.want, errString(got)); d != "" {
				t.Fatalf("CertificateAuthority validation mismatch (-want +got):\n%s", d)
			}
		})
	}
}