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Introduce GroupVersioner for capturing desired target version

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Convert single GV and lists of GVs into an interface that can handle
more complex scenarios (everything internal, nothing supported). Pass
the interface down into conversion.
This commit is contained in:
Clayton Coleman
2016-05-22 19:10:42 -04:00
parent 9d2a5fe5e8
commit 12a5eeea17
24 changed files with 617 additions and 332 deletions
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267
pkg/runtime/scheme_test.go
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@@ -18,6 +18,7 @@ package runtime_test
import (
"reflect"
"strings"
"testing"
"github.com/google/gofuzz"
@@ -460,6 +461,16 @@ type ExternalInternalSame struct {
A TestType2 `json:"A,omitempty"`
}
type UnversionedType struct {
MyWeirdCustomEmbeddedVersionKindField `json:",inline"`
A string `json:"A,omitempty"`
}
type UnknownType struct {
MyWeirdCustomEmbeddedVersionKindField `json:",inline"`
A string `json:"A,omitempty"`
}
func (obj *MyWeirdCustomEmbeddedVersionKindField) GetObjectKind() unversioned.ObjectKind { return obj }
func (obj *MyWeirdCustomEmbeddedVersionKindField) SetGroupVersionKind(gvk unversioned.GroupVersionKind) {
obj.APIVersion, obj.ObjectKind = gvk.ToAPIVersionAndKind()
@@ -500,6 +511,8 @@ var TestObjectFuzzer = fuzz.New().NilChance(.5).NumElements(1, 100).Funcs(
func GetTestScheme() *runtime.Scheme {
internalGV := unversioned.GroupVersion{Version: "__internal"}
externalGV := unversioned.GroupVersion{Version: "v1"}
alternateExternalGV := unversioned.GroupVersion{Group: "custom", Version: "v1"}
differentExternalGV := unversioned.GroupVersion{Group: "other", Version: "v2"}
s := runtime.NewScheme()
// Ordinarily, we wouldn't add TestType2, but because this is a test and
@@ -511,6 +524,11 @@ func GetTestScheme() *runtime.Scheme {
s.AddKnownTypeWithName(externalGV.WithKind("TestType2"), &ExternalTestType2{})
s.AddKnownTypeWithName(internalGV.WithKind("TestType3"), &TestType1{})
s.AddKnownTypeWithName(externalGV.WithKind("TestType3"), &ExternalTestType1{})
s.AddKnownTypeWithName(externalGV.WithKind("TestType4"), &ExternalTestType1{})
s.AddKnownTypeWithName(alternateExternalGV.WithKind("TestType3"), &ExternalTestType1{})
s.AddKnownTypeWithName(alternateExternalGV.WithKind("TestType5"), &ExternalTestType1{})
s.AddKnownTypeWithName(differentExternalGV.WithKind("TestType1"), &ExternalTestType1{})
s.AddUnversionedTypes(externalGV, &UnversionedType{})
return s
}
@@ -528,7 +546,7 @@ func TestKnownTypes(t *testing.T) {
}
}
func TestConvertToVersion(t *testing.T) {
func TestConvertToVersionBasic(t *testing.T) {
s := GetTestScheme()
tt := &TestType1{A: "I'm not a pointer object"}
other, err := s.ConvertToVersion(tt, unversioned.GroupVersion{Version: "v1"})
@@ -537,13 +555,258 @@ func TestConvertToVersion(t *testing.T) {
}
converted, ok := other.(*ExternalTestType1)
if !ok {
t.Fatalf("Got wrong type")
t.Fatalf("Got wrong type: %T", other)
}
if tt.A != converted.A {
t.Fatalf("Failed to convert object correctly: %#v", converted)
}
}
type testGroupVersioner struct {
target unversioned.GroupVersionKind
ok bool
}
func (m testGroupVersioner) KindForGroupVersionKinds(kinds []unversioned.GroupVersionKind) (unversioned.GroupVersionKind, bool) {
return m.target, m.ok
}
func TestConvertToVersion(t *testing.T) {
testCases := []struct {
scheme *runtime.Scheme
in runtime.Object
gv runtime.GroupVersioner
same bool
out runtime.Object
errFn func(error) bool
}{
// errors if the type is not registered in the scheme
{
scheme: GetTestScheme(),
in: &UnknownType{},
errFn: func(err error) bool { return err != nil && runtime.IsNotRegisteredError(err) },
},
// errors if the group versioner returns no target
{
scheme: GetTestScheme(),
in: &ExternalTestType1{A: "test"},
gv: testGroupVersioner{},
errFn: func(err error) bool {
return err != nil && strings.Contains(err.Error(), "is not suitable for converting")
},
},
// converts to internal
{
scheme: GetTestScheme(),
in: &ExternalTestType1{A: "test"},
gv: unversioned.GroupVersion{Version: "__internal"},
out: &TestType1{A: "test"},
},
// prefers the first group version in the list
{
scheme: GetTestScheme(),
in: &ExternalTestType1{A: "test"},
gv: unversioned.GroupVersions{{Version: "__internal"}, {Version: "v1"}},
out: &TestType1{A: "test"},
},
// unversioned type returned as-is
{
scheme: GetTestScheme(),
in: &UnversionedType{A: "test"},
gv: unversioned.GroupVersions{{Version: "v1"}},
same: true,
out: &UnversionedType{
MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "UnversionedType"},
A: "test",
},
},
// detected as already being in the target version
{
scheme: GetTestScheme(),
in: &ExternalTestType1{A: "test"},
gv: unversioned.GroupVersions{{Version: "v1"}},
same: true,
out: &ExternalTestType1{
MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType1"},
A: "test",
},
},
// detected as already being in the first target version
{
scheme: GetTestScheme(),
in: &ExternalTestType1{A: "test"},
gv: unversioned.GroupVersions{{Version: "v1"}, {Version: "__internal"}},
same: true,
out: &ExternalTestType1{
MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType1"},
A: "test",
},
},
// detected as already being in the first target version
{
scheme: GetTestScheme(),
in: &ExternalTestType1{A: "test"},
gv: unversioned.GroupVersions{{Version: "v1"}, {Version: "__internal"}},
same: true,
out: &ExternalTestType1{
MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType1"},
A: "test",
},
},
// the external type is registered in multiple groups, versions, and kinds, and can be targeted to all of them (1/3): different kind
{
scheme: GetTestScheme(),
in: &ExternalTestType1{A: "test"},
gv: testGroupVersioner{ok: true, target: unversioned.GroupVersionKind{Kind: "TestType3", Version: "v1"}},
same: true,
out: &ExternalTestType1{
MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType3"},
A: "test",
},
},
// the external type is registered in multiple groups, versions, and kinds, and can be targeted to all of them (2/3): different gv
{
scheme: GetTestScheme(),
in: &ExternalTestType1{A: "test"},
gv: testGroupVersioner{ok: true, target: unversioned.GroupVersionKind{Kind: "TestType3", Group: "custom", Version: "v1"}},
same: true,
out: &ExternalTestType1{
MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "custom/v1", ObjectKind: "TestType3"},
A: "test",
},
},
// the external type is registered in multiple groups, versions, and kinds, and can be targeted to all of them (3/3): different gvk
{
scheme: GetTestScheme(),
in: &ExternalTestType1{A: "test"},
gv: testGroupVersioner{ok: true, target: unversioned.GroupVersionKind{Group: "custom", Version: "v1", Kind: "TestType5"}},
same: true,
out: &ExternalTestType1{
MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "custom/v1", ObjectKind: "TestType5"},
A: "test",
},
},
// multi group versioner recognizes multiple groups and forces the output to a particular version, copies because version differs
{
scheme: GetTestScheme(),
in: &ExternalTestType1{A: "test"},
gv: runtime.NewMultiGroupVersioner(unversioned.GroupVersion{Group: "other", Version: "v2"}, unversioned.GroupKind{Group: "custom", Kind: "TestType3"}, unversioned.GroupKind{Kind: "TestType1"}),
out: &ExternalTestType1{
MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "other/v2", ObjectKind: "TestType1"},
A: "test",
},
},
// multi group versioner recognizes multiple groups and forces the output to a particular version, copies because version differs
{
scheme: GetTestScheme(),
in: &ExternalTestType1{A: "test"},
gv: runtime.NewMultiGroupVersioner(unversioned.GroupVersion{Group: "other", Version: "v2"}, unversioned.GroupKind{Kind: "TestType1"}, unversioned.GroupKind{Group: "custom", Kind: "TestType3"}),
out: &ExternalTestType1{
MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "other/v2", ObjectKind: "TestType1"},
A: "test",
},
},
// multi group versioner is unable to find a match when kind AND group don't match (there is no TestType1 kind in group "other", and no kind "TestType5" in the default group)
{
scheme: GetTestScheme(),
in: &TestType1{A: "test"},
gv: runtime.NewMultiGroupVersioner(unversioned.GroupVersion{Group: "custom", Version: "v1"}, unversioned.GroupKind{Group: "other"}, unversioned.GroupKind{Kind: "TestType5"}),
errFn: func(err error) bool {
return err != nil && strings.Contains(err.Error(), "is not suitable for converting")
},
},
// multi group versioner recognizes multiple groups and forces the output to a particular version, performs no copy
{
scheme: GetTestScheme(),
in: &ExternalTestType1{A: "test"},
gv: runtime.NewMultiGroupVersioner(unversioned.GroupVersion{Group: "", Version: "v1"}, unversioned.GroupKind{Group: "custom", Kind: "TestType3"}, unversioned.GroupKind{Kind: "TestType1"}),
same: true,
out: &ExternalTestType1{
MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType1"},
A: "test",
},
},
// multi group versioner recognizes multiple groups and forces the output to a particular version, performs no copy
{
scheme: GetTestScheme(),
in: &ExternalTestType1{A: "test"},
gv: runtime.NewMultiGroupVersioner(unversioned.GroupVersion{Group: "", Version: "v1"}, unversioned.GroupKind{Kind: "TestType1"}, unversioned.GroupKind{Group: "custom", Kind: "TestType3"}),
same: true,
out: &ExternalTestType1{
MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType1"},
A: "test",
},
},
// group versioner can choose a particular target kind for a given input when kind is the same across group versions
{
scheme: GetTestScheme(),
in: &TestType1{A: "test"},
gv: testGroupVersioner{ok: true, target: unversioned.GroupVersionKind{Version: "v1", Kind: "TestType3"}},
out: &ExternalTestType1{
MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "v1", ObjectKind: "TestType3"},
A: "test",
},
},
// group versioner can choose a different kind
{
scheme: GetTestScheme(),
in: &TestType1{A: "test"},
gv: testGroupVersioner{ok: true, target: unversioned.GroupVersionKind{Kind: "TestType5", Group: "custom", Version: "v1"}},
out: &ExternalTestType1{
MyWeirdCustomEmbeddedVersionKindField: MyWeirdCustomEmbeddedVersionKindField{APIVersion: "custom/v1", ObjectKind: "TestType5"},
A: "test",
},
},
}
for i, test := range testCases {
original, _ := test.scheme.DeepCopy(test.in)
out, err := test.scheme.ConvertToVersion(test.in, test.gv)
switch {
case test.errFn != nil:
if !test.errFn(err) {
t.Errorf("%d: unexpected error: %v", i, err)
}
continue
case err != nil:
t.Errorf("%d: unexpected error: %v", i, err)
continue
}
if out == test.in {
t.Errorf("%d: ConvertToVersion should always copy out: %#v", i, out)
continue
}
if test.same {
if !reflect.DeepEqual(original, test.in) {
t.Errorf("%d: unexpected mutation of input: %s", i, diff.ObjectReflectDiff(original, test.in))
continue
}
if !reflect.DeepEqual(out, test.out) {
t.Errorf("%d: unexpected out: %s", i, diff.ObjectReflectDiff(out, test.out))
continue
}
unsafe, err := test.scheme.UnsafeConvertToVersion(test.in, test.gv)
if err != nil {
t.Errorf("%d: unexpected error: %v", i, err)
continue
}
if !reflect.DeepEqual(unsafe, test.out) {
t.Errorf("%d: unexpected unsafe: %s", i, diff.ObjectReflectDiff(unsafe, test.out))
continue
}
if unsafe != test.in {
t.Errorf("%d: UnsafeConvertToVersion should return same object: %#v", i, unsafe)
continue
}
continue
}
if !reflect.DeepEqual(out, test.out) {
t.Errorf("%d: unexpected out: %s", i, diff.ObjectReflectDiff(out, test.out))
continue
}
}
}
func TestMetaValues(t *testing.T) {
internalGV := unversioned.GroupVersion{Group: "test.group", Version: "__internal"}
externalGV := unversioned.GroupVersion{Group: "test.group", Version: "externalVersion"}