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// Copyright 2022 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0
package filtersutil_test
import (
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"sigs.k8s.io/kustomize/api/filters/filtersutil"
"sigs.k8s.io/kustomize/kyaml/yaml"
)
func TestTrackableSetter_SetScalarIfEmpty(t *testing.T) {
tests := []struct {
name string
input *yaml.RNode
value string
want string
}{
{
name: "sets null values",
input: yaml.MakeNullNode(),
value: "foo",
want: "foo",
},
{
name: "sets empty values",
input: yaml.NewScalarRNode(""),
value: "foo",
want: "foo",
},
{
name: "does not overwrite values",
input: yaml.NewStringRNode("a"),
value: "foo",
want: "a",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
wasSet := false
s := (&filtersutil.TrackableSetter{}).WithMutationTracker(func(_, _, _ string, _ *yaml.RNode) {
wasSet = true
})
wantSet := tt.value == tt.want
fn := s.SetScalarIfEmpty(tt.value)
require.NoError(t, fn(tt.input))
assert.Equal(t, tt.want, yaml.GetValue(tt.input))
assert.Equal(t, wantSet, wasSet, "tracker invoked even though value was not changed")
})
}
}
func TestTrackableSetter_SetEntryIfEmpty(t *testing.T) {
tests := []struct {
name string
input *yaml.RNode
key string
value string
want string
}{
{
name: "sets empty values",
input: yaml.NewMapRNode(&map[string]string{"setMe": ""}),
key: "setMe",
value: "foo",
want: "foo",
},
{
name: "sets missing keys",
input: yaml.NewMapRNode(&map[string]string{}),
key: "setMe",
value: "foo",
want: "foo",
},
{
name: "does not overwrite values",
input: yaml.NewMapRNode(&map[string]string{"existing": "original"}),
key: "existing",
value: "foo",
want: "original",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
wasSet := false
s := (&filtersutil.TrackableSetter{}).WithMutationTracker(func(_, _, _ string, _ *yaml.RNode) {
wasSet = true
})
wantSet := tt.value == tt.want
fn := s.SetEntryIfEmpty(tt.key, tt.value, "")
require.NoError(t, fn(tt.input))
assert.Equal(t, tt.want, yaml.GetValue(tt.input.Field(tt.key).Value))
assert.Equal(t, wantSet, wasSet, "tracker invoked even though value was not changed")
})
}
}
func TestTrackableSetter_SetEntryIfEmpty_BadInputNodeKind(t *testing.T) {
fn := filtersutil.TrackableSetter{}.SetEntryIfEmpty("foo", "false", yaml.NodeTagBool)
rn := yaml.NewListRNode("nope")
rn.AppendToFieldPath("dummy", "path")
assert.EqualError(t, fn(rn), `wrong node kind: expected MappingNode but got SequenceNode: node contents:
- nope
`)
}
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