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// Copyright 2021 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// These are specialized integration tests. We only build them when we're doing
// a lot of additional work to keep the external docker environment they require
// working.
//go:build integration
package exporter
import (
"fmt"
"os"
"strings"
"testing"
_ "github.com/lib/pq"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/promslog"
. "gopkg.in/check.v1"
)
// Hook up gocheck into the "go test" runner.
func Test(t *testing.T) { TestingT(t) }
type IntegrationSuite struct {
e *Exporter
}
var _ = Suite(&IntegrationSuite{})
func (s *IntegrationSuite) SetUpSuite(c *C) {
dsn := os.Getenv("DATA_SOURCE_NAME")
c.Assert(dsn, Not(Equals), "")
exporter := NewExporter(strings.Split(dsn, ","), promslog.NewNopLogger())
c.Assert(exporter, NotNil)
// Assign the exporter to the suite
s.e = exporter
prometheus.MustRegister(exporter)
}
// TODO: it would be nice if cu didn't mostly just recreate the scrape function
func (s *IntegrationSuite) TestAllNamespacesReturnResults(c *C) {
// Setup a dummy channel to consume metrics
ch := make(chan prometheus.Metric, 100)
go func() {
for range ch {
}
}()
for _, dsn := range s.e.dsn {
// Open a database connection
server, err := NewServer(dsn)
c.Assert(server, NotNil)
c.Assert(err, IsNil)
// Do a version update
err = s.e.checkMapVersions(ch, server)
c.Assert(err, IsNil)
err = querySettings(ch, server)
if !c.Check(err, Equals, nil) {
fmt.Println("## ERRORS FOUND")
fmt.Println(err)
}
// This should never happen in our test cases.
errMap := queryNamespaceMappings(ch, server)
if !c.Check(len(errMap), Equals, 0) {
fmt.Println("## NAMESPACE ERRORS FOUND")
for namespace, err := range errMap {
fmt.Println(namespace, ":", err)
}
}
server.Close()
}
}
// TestInvalidDsnDoesntCrash tests that specifying an invalid DSN doesn't crash
// the exporter. Related to https://github.com/prometheus-community/postgres_exporter/issues/93
// although not a replication of the scenario.
func (s *IntegrationSuite) TestInvalidDsnDoesntCrash(c *C) {
// Setup a dummy channel to consume metrics
ch := make(chan prometheus.Metric, 100)
go func() {
for range ch {
}
}()
// Send a bad DSN
exporter := NewExporter([]string{"invalid dsn"}, promslog.NewNopLogger())
c.Assert(exporter, NotNil)
exporter.scrape(ch)
// Send a DSN to a non-listening port.
exporter = NewExporter([]string{"postgresql://nothing:nothing@127.0.0.1:1/nothing"}, promslog.NewNopLogger())
c.Assert(exporter, NotNil)
exporter.scrape(ch)
}
// TestUnknownMetricParsingDoesntCrash deliberately deletes all the column maps out
// of an exporter to test that the default metric handling code can cope with unknown columns.
func (s *IntegrationSuite) TestUnknownMetricParsingDoesntCrash(c *C) {
// Setup a dummy channel to consume metrics
ch := make(chan prometheus.Metric, 100)
go func() {
for range ch {
}
}()
dsn := os.Getenv("DATA_SOURCE_NAME")
c.Assert(dsn, Not(Equals), "")
exporter := NewExporter(strings.Split(dsn, ","), promslog.NewNopLogger())
c.Assert(exporter, NotNil)
// Convert the default maps into a list of empty maps.
emptyMaps := make(map[string]intermediateMetricMap, 0)
for k := range exporter.builtinMetricMaps {
emptyMaps[k] = intermediateMetricMap{
map[string]ColumnMapping{},
true,
0,
}
}
exporter.builtinMetricMaps = emptyMaps
// scrape the exporter and make sure it works
exporter.scrape(ch)
}
// TestExtendQueriesDoesntCrash tests that specifying extend.query-path doesn't
// crash.
func (s *IntegrationSuite) TestExtendQueriesDoesntCrash(c *C) {
// Setup a dummy channel to consume metrics
ch := make(chan prometheus.Metric, 100)
go func() {
for range ch {
}
}()
dsn := os.Getenv("DATA_SOURCE_NAME")
c.Assert(dsn, Not(Equals), "")
exporter := NewExporter(
strings.Split(dsn, ","),
promslog.NewNopLogger(),
WithUserQueriesPath("../user_queries_test.yaml"),
)
c.Assert(exporter, NotNil)
// scrape the exporter and make sure it works
exporter.scrape(ch)
}
func (s *IntegrationSuite) TestAutoDiscoverDatabases(c *C) {
dsn := os.Getenv("DATA_SOURCE_NAME")
exporter := NewExporter(
strings.Split(dsn, ","),
promslog.NewNopLogger(),
)
c.Assert(exporter, NotNil)
dsns := exporter.discoverDatabaseDSNs()
c.Assert(len(dsns), Equals, 2)
}
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