add shoot matcher

internal/testing/shoot/matcher.go

@@ -0,0 +1,131 @@
+package shoot
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+
+	"github.com/gardener/gardener/pkg/apis/core/v1beta1"
+	"github.com/onsi/gomega"
+	"github.com/onsi/gomega/types"
+	"sigs.k8s.io/yaml"
+)
+
+var (
+	errInvalidType = fmt.Errorf("invalid type")
+)
+
+type Matcher struct {
+	toMatch interface{}
+	fails   []string
+}
+
+func NewMatcher(i interface{}) types.GomegaMatcher {
+	return &Matcher{
+		toMatch: i,
+	}
+}
+
+func getShoot(i interface{}) (shoot v1beta1.Shoot, err error) {
+	if i == nil {
+		return v1beta1.Shoot{}, fmt.Errorf("invalid value nil")
+	}
+
+	switch v := i.(type) {
+	case string:
+		err = yaml.Unmarshal([]byte(v), &shoot)
+		return shoot, err
+
+	case v1beta1.Shoot:
+		return v, nil
+
+	case *v1beta1.Shoot:
+		return *v, nil
+
+	default:
+		return v1beta1.Shoot{}, fmt.Errorf(`%w: %s`, errInvalidType, reflect.TypeOf(v))
+	}
+}
+
+type matcher struct {
+	types.GomegaMatcher
+	path   string
+	actual interface{}
+}
+
+func (m *Matcher) Match(actual interface{}) (success bool, err error) {
+	aShoot, err := getShoot(actual)
+	if err != nil {
+		return false, err
+	}
+
+	eShoot, err := getShoot(m.toMatch)
+	if err != nil {
+		return false, err
+	}
+
+	for _, matcher := range []matcher{
+		{
+			GomegaMatcher: gomega.Equal(eShoot.TypeMeta),
+			actual:        aShoot.TypeMeta,
+		},
+		{
+			GomegaMatcher: gomega.Equal(eShoot.Name),
+			actual:        aShoot.Name,
+			path:          "metadata/name",
+		},
+		{
+			GomegaMatcher: gomega.Equal(eShoot.Namespace),
+			actual:        aShoot.Namespace,
+			path:          "metadata/namespace",
+		},
+		{
+			GomegaMatcher: gomega.Equal(eShoot.Labels),
+			actual:        aShoot.Labels,
+			path:          "metadata/labels",
+		},
+		{
+			GomegaMatcher: gomega.Equal(eShoot.Annotations),
+			actual:        aShoot.Annotations,
+			path:          "metadata/annotations",
+		},
+		{
+			GomegaMatcher: gomega.Equal(eShoot.OwnerReferences),
+			actual:        aShoot.OwnerReferences,
+			path:          "metadata/ownerReferences",
+		},
+		{
+			GomegaMatcher: gomega.Equal(eShoot.Finalizers),
+			actual:        aShoot.Finalizers,
+			path:          "metadata/finalizers",
+		},
+		{
+			GomegaMatcher: gomega.Equal(eShoot.Spec),
+			actual:        aShoot.Spec,
+			path:          "spec",
+		},
+	} {
+		ok, err := matcher.Match(matcher.actual)
+		if err != nil {
+			return false, err
+		}
+
+		if !ok {
+			msg := matcher.FailureMessage(matcher.actual)
+			if matcher.path != "" {
+				msg = fmt.Sprintf("%s: %s", matcher.path, msg)
+			}
+			m.fails = append(m.fails, msg)
+		}
+	}
+
+	return len(m.fails) == 0, nil
+}
+
+func (m *Matcher) NegatedFailureMessage(_ interface{}) string {
+	return "expected should not equal actual"
+}
+
+func (m *Matcher) FailureMessage(_ interface{}) string {
+	return strings.Join(m.fails, "\n")
+}

internal/testing/shoot/matcher_test.go

@@ -0,0 +1,155 @@
+package shoot_test
+
+import (
+	"github.com/gardener/gardener/pkg/apis/core/v1beta1"
+	"github.com/kyma-project/infrastructure-manager/internal/testing/shoot"
+	. "github.com/onsi/ginkgo/v2" //nolint:revive
+	. "github.com/onsi/gomega"    //nolint:revive
+	corev1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+type deepCpOpts = func(*v1beta1.Shoot)
+
+func withName(name string) deepCpOpts {
+	return func(s *v1beta1.Shoot) {
+		s.Name = name
+	}
+}
+
+func withNamespace(namespace string) deepCpOpts {
+	return func(s *v1beta1.Shoot) {
+		s.Namespace = namespace
+	}
+}
+
+func withLabels(labels map[string]string) deepCpOpts {
+	return func(s *v1beta1.Shoot) {
+		s.Labels = labels
+	}
+}
+
+func withFinalizers(finalizers []string) deepCpOpts {
+	return func(s *v1beta1.Shoot) {
+		s.Finalizers = finalizers
+	}
+}
+
+func withOwnerReferences(ownerReferences []corev1.OwnerReference) deepCpOpts {
+	return func(s *v1beta1.Shoot) {
+		s.OwnerReferences = ownerReferences
+	}
+}
+
+func withAnnotations(annotations map[string]string) deepCpOpts {
+	return func(s *v1beta1.Shoot) {
+		s.Annotations = annotations
+	}
+}
+
+func withShootSpec(spec v1beta1.ShootSpec) deepCpOpts {
+	return func(s *v1beta1.Shoot) {
+		s.Spec = spec
+	}
+}
+
+// nolint: unparam
+func deepCp(s v1beta1.Shoot, opts ...deepCpOpts) v1beta1.Shoot {
+	for _, opt := range opts {
+		opt(&s)
+	}
+
+	return s
+}
+
+func testInvalidArgs(actual, expected interface{}) {
+	matcher := shoot.NewMatcher(expected)
+	_, err := matcher.Match(actual)
+	Expect(err).To(HaveOccurred())
+}
+
+func testResults(actual, expected interface{}, expectedMatch bool) {
+	matcher := shoot.NewMatcher(expected)
+	actualMatch, err := matcher.Match(actual)
+	Expect(err).ShouldNot(HaveOccurred())
+	Expect(actualMatch).Should(Equal(expectedMatch), matcher.FailureMessage(actual))
+}
+
+var _ = Describe(":: shoot matcher :: ", func() {
+	var empty v1beta1.Shoot
+
+	DescribeTable(
+		"checking invalid args :: ",
+		testInvalidArgs,
+		Entry("when actual is nil", nil, empty),
+		Entry("when expected is nil", "", nil),
+	)
+
+	DescribeTable(
+		"checking results :: ",
+		testResults,
+		Entry(
+			"should match empty and zero values",
+			"",
+			empty,
+			true,
+		),
+		Entry(
+			"should match copies of the same instance",
+			deepCp(empty),
+			deepCp(empty),
+			true,
+		),
+		Entry(
+			"should detect name difference",
+			deepCp(empty, withName("test1")),
+			deepCp(empty, withName("test2")),
+			false,
+		),
+		Entry(
+			"should detect namespace difference",
+			deepCp(empty, withNamespace("test1")),
+			deepCp(empty, withNamespace("test2")),
+			false,
+		),
+		Entry(
+			"should detect difference in labels",
+			deepCp(empty, withLabels(map[string]string{"test": "me"})),
+			deepCp(empty, withLabels(map[string]string{})),
+			false,
+		),
+		Entry(
+			"should detect difference in annotations",
+			deepCp(empty, withAnnotations(map[string]string{"test": "me"})),
+			deepCp(empty, withAnnotations(map[string]string{"test": "it"})),
+			false,
+		),
+		Entry(
+			"should detect differences in finalizers",
+			deepCp(empty, withFinalizers([]string{"test", "me"})),
+			deepCp(empty, withFinalizers([]string{"test", "me 2"})),
+			false,
+		),
+		Entry(
+			"should detect differences in owner references",
+			deepCp(empty, withOwnerReferences([]corev1.OwnerReference{
+				{Name: "test1", UID: "1"},
+				{Name: "test2", UID: "2"},
+			})),
+			deepCp(empty, withOwnerReferences([]corev1.OwnerReference{
+				{Name: "test1", UID: "1"},
+				{Name: "test3", UID: "3"},
+			})),
+			false,
+		),
+		Entry(
+			"should detect differences in spec",
+			deepCp(empty, withShootSpec(v1beta1.ShootSpec{
+				Region: "test1",
+			})),
+			deepCp(empty, withShootSpec(v1beta1.ShootSpec{
+				Region: "test2",
+			})),
+			false,
+		),
+	)
+})

internal/testing/shoot/suite_test.go

@@ -0,0 +1,13 @@
+package shoot_test
+
+import (
+	"testing"
+
+	"github.com/onsi/ginkgo/v2" //nolint:revive
+	"github.com/onsi/gomega"    //nolint:revive
+)
+
+func TestMatcher(t *testing.T) {
+	gomega.RegisterFailHandler(ginkgo.Fail)
+	ginkgo.RunSpecs(t, "shoot matcher")
+}