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Expose single annotation/label via downward API

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This commit is contained in:
Yang Guo
2017-02-17 17:37:15 +01:00
parent 754017bef4
commit 82c9eec164
9 changed files with 276 additions and 19 deletions
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96
pkg/fieldpath/fieldpath_test.go
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@@ -88,6 +88,16 @@ func TestExtractFieldPathAsString(t *testing.T) {
},
expectedValue: "builder=\"john-doe\"",
},
{
name: "ok - annotation",
fieldPath: "metadata.annotations['spec.pod.beta.kubernetes.io/statefulset-index']",
obj: &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{"spec.pod.beta.kubernetes.io/statefulset-index": "1"},
},
},
expectedValue: "1",
},
{
name: "invalid expression",
@@ -99,6 +109,16 @@ func TestExtractFieldPathAsString(t *testing.T) {
},
expectedMessageFragment: "unsupported fieldPath",
},
{
name: "invalid annotation",
fieldPath: "metadata.annotations['unknown.key']",
obj: &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{"foo": "bar"},
},
},
expectedMessageFragment: "unsupported fieldPath",
},
}
for _, tc := range cases {
@@ -116,3 +136,79 @@ func TestExtractFieldPathAsString(t *testing.T) {
}
}
}
func TestSplitMaybeSubscriptedPath(t *testing.T) {
cases := []struct {
fieldPath string
expectedPath string
expectedSubscript string
}{
{
fieldPath: "metadata.annotations['key']",
expectedPath: "metadata.annotations",
expectedSubscript: "key",
},
{
fieldPath: "metadata.annotations['a[b']c']",
expectedPath: "metadata.annotations",
expectedSubscript: "a[b']c",
},
{
fieldPath: "metadata.labels['['key']",
expectedPath: "metadata.labels",
expectedSubscript: "['key",
},
{
fieldPath: "metadata.labels['key']']",
expectedPath: "metadata.labels",
expectedSubscript: "key']",
},
{
fieldPath: "metadata.labels[ 'key' ]",
expectedPath: "metadata.labels[ 'key' ]",
expectedSubscript: "",
},
{
fieldPath: "metadata.labels['']",
expectedPath: "metadata.labels['']",
expectedSubscript: "",
},
{
fieldPath: "metadata.labels[' ']",
expectedPath: "metadata.labels",
expectedSubscript: " ",
},
{
fieldPath: "metadata.labels[]",
expectedPath: "metadata.labels[]",
expectedSubscript: "",
},
{
fieldPath: "metadata.labels[']",
expectedPath: "metadata.labels[']",
expectedSubscript: "",
},
{
fieldPath: "metadata.labels['key']foo",
expectedPath: "metadata.labels['key']foo",
expectedSubscript: "",
},
{
fieldPath: "['key']",
expectedPath: "['key']",
expectedSubscript: "",
},
{
fieldPath: "metadata.labels",
expectedPath: "metadata.labels",
expectedSubscript: "",
},
}
for _, tc := range cases {
path, subscript := SplitMaybeSubscriptedPath(tc.fieldPath)
if path != tc.expectedPath || subscript != tc.expectedSubscript {
t.Errorf("SplitMaybeSubscriptedPath(%q) = (%q, %q), expect (%q, %q)",
tc.fieldPath, path, subscript, tc.expectedPath, tc.expectedSubscript)
}
}
}