class TestComponent implements SoftwareComponentInternal, ComponentWithVariants {
                String name
                Set usages = []
                Set variants = []
            }

            class TestUsage implements UsageContext {
                String name
                Usage usage
                Set dependencies = []
                Set dependencyConstraints = []
                Set artifacts = []

	allErrs := field.ErrorList{}

	// validate usages
	if err := bootstraputil.ValidateUsages(usages); err != nil {
		allErrs = append(allErrs, field.Invalid(fldPath, usages, err.Error()))
	}

	return allErrs
}

// ValidateEtcd validates the .Etcd sub-struct.
func ValidateEtcd(e *kubeadm.Etcd, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}

			config: CertConfig{
				Config: certutil.Config{
					CommonName: "test",
					Usages:     []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
				},
			},
			expected: true,
		},
		{
			name: "has ServerAuth ECDSA",
			config: CertConfig{
				Config: certutil.Config{
					CommonName: "test",
					Usages:     []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
				},

            class TestComponent implements SoftwareComponentInternal, ComponentWithVariants {
                String name
                Set usages = []
                Set variants = []
            }

            class TestUsage implements UsageContext {
                String name
                Usage usage
                Set dependencies = []
                Set dependencyConstraints = []
                Set artifacts = []

        Multimap<SourceSet, SourceSet> usages = LinkedHashMultimap.create();
        for (SourceSet sourceSet : sourceSets) {
            for (SourceSet otherSourceSet : sourceSets) {
                if (containsOutputOf(sourceSet, otherSourceSet)) {
                    usages.put(otherSourceSet, sourceSet);
                }
            }
        }
        return usages;
    }

// CHECK-SAME: dense<0>
// CHECK-DAG: %[[CST_0:.*]] = "tf.Const"
// CHECK-SAME: dense<1>
// Check that there are no extra "tf.Const"s existing in this function.
// CHECK-NOT: "tf.Const"

// Check that the usages of %[[CST]] and %[[CST_0]] are untouched.
// CHECK: %[[ADD:.*]] = "tf.AddV2"(%[[CST]], %[[CST_0]])
// CHECK: "tf.Max"({{.*}}, %[[ADD]])

// -----

// CHECK-LABEL: @recursively_duplicate_constants

    }

    private String buildProperNames(List<ProperMethodUsage> usages) {
        usages.collect { ProperMethodUsage.buildProperName(it) }.join(", ")
    }

    private String buildAllowedUsages(String role) {
        switch (role) {
            case 'dependencyScope':

	usages := make([]ExtKeyUsage, len(keyUsages))
	copy(usages, keyUsages)

	if len(chain) == 0 {
		return false
	}

	usagesRemaining := len(usages)

	// We walk down the list and cross out any usages that aren't supported
	// by each certificate. If we cross out all the usages, then the chain
	// is unacceptable.

NextCert:

            "server": {
                "expiry": "43800h",
                "usages": [
                    "signing",
                    "key encipherment",
                    "server auth",
                    "client auth"
                ]
            },
            "client": {
                "expiry": "43800h",
                "usages": [
                    "signing",
                    "key encipherment",

			}
			client.PrependReactor("get", "certificatesigningrequests", defaultReactionFunc(csr))

			usages := []cert.KeyUsage{
				cert.UsageDigitalSignature,
				cert.UsageKeyEncipherment,
				cert.UsageServerAuth,
				cert.UsageClientAuth,
			}
			r, err := submitCSR(client, []byte("test-pem"), "test-signer",
				usages, DefaulCertTTL)
			if tc.expectFail {
				assert.Error(t, err)
			} else if err != nil || r == nil {