149 lines
4.7 KiB
Go
149 lines
4.7 KiB
Go
// Copyright 2015 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package collector
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import (
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"fmt"
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"os"
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"testing"
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"github.com/google/cadvisor/info/v1"
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"github.com/stretchr/testify/assert"
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)
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func TestEmptyConfig(t *testing.T) {
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assert := assert.New(t)
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emptyConfig := `
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{
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"endpoint" : "http://localhost:8000/nginx_status",
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"metrics_config" : [
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]
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}
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`
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//Create a temporary config file 'temp.json' with invalid json format
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assert.NoError(ioutil.WriteFile("temp.json", []byte(emptyConfig), 0777))
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_, err := NewCollector("tempCollector", "temp.json")
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assert.Error(err)
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assert.NoError(os.Remove("temp.json"))
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}
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func TestConfigWithErrors(t *testing.T) {
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assert := assert.New(t)
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//Syntax error: Missed '"' after activeConnections
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invalid := `
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{
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"endpoint" : "http://localhost:8000/nginx_status",
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"metrics_config" : [
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{
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"name" : "activeConnections,
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"metric_type" : "gauge",
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"units" : "integer",
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"polling_frequency" : 10,
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"regex" : "Active connections: ([0-9]+)"
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}
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]
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}
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`
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//Create a temporary config file 'temp.json' with invalid json format
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assert.NoError(ioutil.WriteFile("temp.json", []byte(invalid), 0777))
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_, err := NewCollector("tempCollector", "temp.json")
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assert.Error(err)
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assert.NoError(os.Remove("temp.json"))
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}
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func TestConfigWithRegexErrors(t *testing.T) {
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assert := assert.New(t)
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//Error: Missed operand for '+' in activeConnections regex
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invalid := `
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{
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"endpoint" : "host:port/nginx_status",
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"metrics_config" : [
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{
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"name" : "activeConnections",
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"metric_type" : "gauge",
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"units" : "integer",
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"polling_frequency" : 10,
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"regex" : "Active connections: (+)"
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},
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{
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"name" : "reading",
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"metric_type" : "gauge",
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"units" : "integer",
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"polling_frequency" : 10,
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"regex" : "Reading: ([0-9]+) .*"
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}
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]
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}
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`
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//Create a temporary config file 'temp.json'
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assert.NoError(ioutil.WriteFile("temp.json", []byte(invalid), 0777))
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_, err := NewCollector("tempCollector", "temp.json")
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assert.Error(err)
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assert.NoError(os.Remove("temp.json"))
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}
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func TestConfig(t *testing.T) {
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assert := assert.New(t)
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//Create an nginx collector using the config file 'sample_config.json'
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collector, err := NewCollector("nginx", "config/sample_config.json")
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assert.NoError(err)
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assert.Equal(collector.name, "nginx")
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assert.Equal(collector.configFile.Endpoint, "http://localhost:8000/nginx_status")
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assert.Equal(collector.configFile.MetricsConfig[0].Name, "activeConnections")
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}
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func TestMetricCollection(t *testing.T) {
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assert := assert.New(t)
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//Collect nginx metrics from a fake nginx endpoint
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fakeCollector, err := NewCollector("nginx", "config/sample_config.json")
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assert.NoError(err)
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tempServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintln(w, "Active connections: 3\nserver accepts handled requests")
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fmt.Fprintln(w, "5 5 32\nReading: 0 Writing: 1 Waiting: 2")
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}))
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defer tempServer.Close()
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fakeCollector.configFile.Endpoint = tempServer.URL
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_, metrics, errMetric := fakeCollector.Collect()
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assert.NoError(errMetric)
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assert.Equal(metrics[0].Name, "activeConnections")
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assert.Equal(metrics[0].Type, v1.MetricGauge)
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assert.Nil(metrics[0].FloatPoints)
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assert.Equal(metrics[1].Name, "reading")
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assert.Equal(metrics[2].Name, "writing")
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assert.Equal(metrics[3].Name, "waiting")
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//Assert: Number of active connections = Number of connections reading + Number of connections writing + Number of connections waiting
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assert.Equal(metrics[0].IntPoints[0].Value, (metrics[1].IntPoints[0].Value)+(metrics[2].IntPoints[0].Value)+(metrics[3].IntPoints[0].Value))
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}
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