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// Copyright 2015 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.
package api
import (
"bytes"
"context"
"fmt"
"net/http"
"net/http/httptest"
"net/url"
"testing"
)
func TestConfig(t *testing.T) {
c := Config{}
if c.roundTripper() != DefaultRoundTripper {
t.Fatalf("expected default roundtripper for nil RoundTripper field")
}
}
func TestClientURL(t *testing.T) {
tests := []struct {
address string
endpoint string
args map[string]string
expected string
}{
{
address: "http://localhost:9090",
endpoint: "/test",
expected: "http://localhost:9090/test",
},
{
address: "http://localhost",
endpoint: "/test",
expected: "http://localhost/test",
},
{
address: "http://localhost:9090",
endpoint: "test",
expected: "http://localhost:9090/test",
},
{
address: "http://localhost:9090/prefix",
endpoint: "/test",
expected: "http://localhost:9090/prefix/test",
},
{
address: "https://localhost:9090/",
endpoint: "/test/",
expected: "https://localhost:9090/test",
},
{
address: "http://localhost:9090",
endpoint: "/test/:param",
args: map[string]string{
"param": "content",
},
expected: "http://localhost:9090/test/content",
},
{
address: "http://localhost:9090",
endpoint: "/test/:param/more/:param",
args: map[string]string{
"param": "content",
},
expected: "http://localhost:9090/test/content/more/content",
},
{
address: "http://localhost:9090",
endpoint: "/test/:param/more/:foo",
args: map[string]string{
"param": "content",
"foo": "bar",
},
expected: "http://localhost:9090/test/content/more/bar",
},
{
address: "http://localhost:9090",
endpoint: "/test/:param",
args: map[string]string{
"nonexistent": "content",
},
expected: "http://localhost:9090/test/:param",
},
}
for _, test := range tests {
ep, err := url.Parse(test.address)
if err != nil {
t.Fatal(err)
}
hclient := &httpClient{
endpoint: ep,
client: http.Client{Transport: DefaultRoundTripper},
}
u := hclient.URL(test.endpoint, test.args)
if u.String() != test.expected {
t.Errorf("unexpected result: got %s, want %s", u, test.expected)
continue
}
}
}
// Serve any http request with a response of N KB of spaces.
type serveSpaces struct {
sizeKB int
}
func (t serveSpaces) ServeHTTP(w http.ResponseWriter, req *http.Request) {
kb := bytes.Repeat([]byte{' '}, 1024)
for i := 0; i < t.sizeKB; i++ {
w.Write(kb)
}
}
func BenchmarkClient(b *testing.B) {
b.ReportAllocs()
ctx := context.Background()
for _, sizeKB := range []int{4, 50, 1000, 2000} {
b.Run(fmt.Sprintf("%dKB", sizeKB), func(b *testing.B) {
testServer := httptest.NewServer(serveSpaces{sizeKB})
defer testServer.Close()
client, err := NewClient(Config{
Address: testServer.URL,
})
if err != nil {
b.Fatalf("Failed to initialize client: %v", err)
}
url, err := url.Parse(testServer.URL + "/prometheus/api/v1/query?query=up")
if err != nil {
b.Fatalf("Failed to parse url: %v", err)
}
req := &http.Request{
URL: url,
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _, err := client.Do(ctx, req)
if err != nil {
b.Fatalf("Query failed: %v", err)
}
}
b.StopTimer()
})
}
}