prometheus-paperless-exporter/tag_test.go

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package main
import (
"context"
"errors"
"testing"
"github.com/google/go-cmp/cmp"
"github.com/google/go-cmp/cmp/cmpopts"
"github.com/hansmi/paperhooks/pkg/client"
"github.com/hansmi/prometheus-paperless-exporter/internal/testutil"
)
type fakeTagClient struct {
items []client.Tag
err error
}
func (c *fakeTagClient) ListAllTags(ctx context.Context, opts *client.ListTagsOptions, handler func(context.Context, client.Tag) error) error {
for _, i := range c.items {
if err := handler(ctx, i); err != nil {
return err
}
}
return c.err
}
func TestTag(t *testing.T) {
errTest := errors.New("test error")
for _, tc := range []struct {
name string
cl fakeTagClient
wantErr error
}{
{
name: "empty",
},
{
name: "listing fails",
cl: fakeTagClient{
err: errTest,
},
wantErr: errTest,
},
{
name: "tags",
cl: fakeTagClient{
items: []client.Tag{
{ID: 8463},
{ID: 8463},
{ID: 338},
{ID: 11768},
{ID: 30619},
{ID: 27086},
},
},
},
} {
t.Run(tc.name, func(t *testing.T) {
c := newTagCollector(&tc.cl)
err := c.collect(context.Background(), testutil.DiscardMetrics(t))
if diff := cmp.Diff(tc.wantErr, err, cmpopts.EquateErrors()); diff != "" {
t.Errorf("Error diff (-want +got):\n%s", diff)
}
})
}
}
func TestTagCollect(t *testing.T) {
cl := fakeTagClient{}
c := newMultiCollector(newTagCollector(&cl))
testutil.CollectAndCompare(t, c, ``)
cl.items = append(cl.items, []client.Tag{
{ID: 8463, Name: "aaa", Slug: "aslug"},
{ID: 338, Name: "three-three-eight", DocumentCount: 13},
{ID: 26429, Name: "last"},
}...)
testutil.CollectAndCompare(t, c, `
# HELP paperless_tag_document_count Number of documents associated with a tag.
# TYPE paperless_tag_document_count gauge
paperless_tag_document_count{id="26429"} 0
paperless_tag_document_count{id="338"} 13
paperless_tag_document_count{id="8463"} 0
# HELP paperless_tag_info Static information about a tag.
# TYPE paperless_tag_info gauge
paperless_tag_info{id="26429",name="last",slug=""} 1
paperless_tag_info{id="338",name="three-three-eight",slug=""} 1
paperless_tag_info{id="8463",name="aaa",slug="aslug"} 1
`)
}