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Adding unit test for target group (#6141)

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* adding unit test for target group

Signed-off-by: Jean-Baptiste Le Duigou <jb.leduigou@gmail.com>

* Improve unit tests for target group

Signed-off-by: Jean-Baptiste Le Duigou <jb.leduigou@gmail.com>

* Fix imports

Signed-off-by: Jean-Baptiste Le Duigou <jb.leduigou@gmail.com>

* Improve test by asserting on whole Target Group object

Signed-off-by: Jean-Baptiste Le Duigou <jb.leduigou@gmail.com>
This commit is contained in:
Simon Pasquier 2019-10-18 16:24:26 +02:00 committed by GitHub
parent d2645018cf 0939d566f3
commit 3acc3e856c
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 86 additions and 20 deletions
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90
discovery/targetgroup/targetgroup_test.go
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@ -17,18 +17,29 @@ import (
"errors"
"testing"
"github.com/prometheus/prometheus/util/testutil"
"github.com/prometheus/common/model"
"gopkg.in/yaml.v2"
"github.com/prometheus/prometheus/util/testutil"
)
func TestTargetGroupStrictJsonUnmarshal(t *testing.T) {
tests := []struct {
json string
expectedReply error
expectedGroup Group
}{
{
json: ` {"labels": {},"targets": []}`,
expectedReply: nil,
expectedGroup: Group{Targets: []model.LabelSet{}, Labels: model.LabelSet{}},
},
{
json: ` {"labels": {"my":"label"},"targets": ["localhost:9090","localhost:9091"]}`,
expectedReply: nil,
expectedGroup: Group{Targets: []model.LabelSet{
model.LabelSet{"__address__": "localhost:9090"},
model.LabelSet{"__address__": "localhost:9091"}}, Labels: model.LabelSet{"my": "label"}},
},
{
json: ` {"label": {},"targets": []}`,
@ -39,15 +50,54 @@ func TestTargetGroupStrictJsonUnmarshal(t *testing.T) {
expectedReply: errors.New("json: unknown field \"target\""),
},
}
tg := Group{}
for _, test := range tests {
tg := Group{}
actual := tg.UnmarshalJSON([]byte(test.json))
testutil.Equals(t, test.expectedReply, actual)
testutil.Equals(t, test.expectedGroup, tg)
}
}
func TestTargetGroupYamlMarshal(t *testing.T) {
marshal := func(g interface{}) []byte {
d, err := yaml.Marshal(g)
if err != nil {
panic(err)
}
return d
}
tests := []struct {
expectedYaml string
expectetedErr error
group Group
}{
{
// labels should be omitted if empty.
group: Group{},
expectedYaml: "targets: []\n",
expectetedErr: nil,
},
{
// targets only exposes addresses.
group: Group{Targets: []model.LabelSet{
model.LabelSet{"__address__": "localhost:9090"},
model.LabelSet{"__address__": "localhost:9091"}},
Labels: model.LabelSet{"foo": "bar", "bar": "baz"}},
expectedYaml: "targets:\n- localhost:9090\n- localhost:9091\nlabels:\n bar: baz\n foo: bar\n",
expectetedErr: nil,
},
}
for _, test := range tests {
actual, err := test.group.MarshalYAML()
testutil.Equals(t, test.expectetedErr, err)
testutil.Equals(t, test.expectedYaml, string(marshal(actual)))
}
}
func TestTargetGroupYamlUnmarshal(t *testing.T) {
unmarshal := func(d []byte) func(interface{}) error {
return func(o interface{}) error {
@ -56,26 +106,26 @@ func TestTargetGroupYamlUnmarshal(t *testing.T) {
}
tests := []struct {
yaml string
expectedNumberOfTargets int
expectedNumberOfLabels int
expectedGroup Group
expectedReply error
}{
{
// empty target group.
yaml: "labels:\ntargets:\n",
expectedNumberOfTargets: 0,
expectedNumberOfLabels: 0,
expectedGroup: Group{Targets: []model.LabelSet{}},
expectedReply: nil,
},
{
// brackets syntax.
yaml: "labels:\n my: label\ntargets:\n ['localhost:9090', 'localhost:9191']",
expectedNumberOfTargets: 2,
expectedNumberOfLabels: 1,
expectedReply: nil,
expectedGroup: Group{Targets: []model.LabelSet{
model.LabelSet{"__address__": "localhost:9090"},
model.LabelSet{"__address__": "localhost:9191"}}, Labels: model.LabelSet{"my": "label"}},
},
{
// incorrect syntax.
yaml: "labels:\ntargets:\n 'localhost:9090'",
expectedNumberOfTargets: 0,
expectedNumberOfLabels: 0,
expectedReply: &yaml.TypeError{Errors: []string{"line 3: cannot unmarshal !!str `localho...` into []string"}},
},
}
@ -84,8 +134,24 @@ func TestTargetGroupYamlUnmarshal(t *testing.T) {
tg := Group{}
actual := tg.UnmarshalYAML(unmarshal([]byte(test.yaml)))
testutil.Equals(t, test.expectedReply, actual)
testutil.Equals(t, test.expectedNumberOfTargets, len(tg.Targets))
testutil.Equals(t, test.expectedNumberOfLabels, len(tg.Labels))
testutil.Equals(t, test.expectedGroup, tg)
}
}
func TestString(t *testing.T) {
// String() should return only the source, regardless of other attributes.
group1 :=
Group{Targets: []model.LabelSet{
model.LabelSet{"__address__": "localhost:9090"},
model.LabelSet{"__address__": "localhost:9091"}},
Source: "<source>",
Labels: model.LabelSet{"foo": "bar", "bar": "baz"}}
group2 :=
Group{Targets: []model.LabelSet{},
Source: "<source>",
Labels: model.LabelSet{}}
testutil.Equals(t, "<source>", group1.String())
testutil.Equals(t, "<source>", group2.String())
testutil.Equals(t, group1.String(), group2.String())
}