client_golang/api/prometheus/api_test.go

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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 prometheus
import (
"encoding/json"
"fmt"
"net/http"
"net/url"
"reflect"
"strings"
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"testing"
"time"
"github.com/prometheus/common/model"
"golang.org/x/net/context"
)
func TestConfig(t *testing.T) {
c := Config{}
if c.transport() != DefaultTransport {
t.Fatalf("expected default transport for nil Transport 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{
"nonexistant": "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,
transport: DefaultTransport,
}
u := hclient.url(test.endpoint, test.args)
if u.String() != test.expected {
t.Errorf("unexpected result: got %s, want %s", u, test.expected)
continue
}
// The apiClient must return exactly the same result as the httpClient.
aclient := &apiClient{hclient}
u = aclient.url(test.endpoint, test.args)
if u.String() != test.expected {
t.Errorf("unexpected result: got %s, want %s", u, test.expected)
}
}
}
type testClient struct {
*testing.T
ch chan apiClientTest
req *http.Request
}
type apiClientTest struct {
code int
response interface{}
expected string
err *Error
}
func (c *testClient) url(ep string, args map[string]string) *url.URL {
return nil
}
func (c *testClient) do(ctx context.Context, req *http.Request) (*http.Response, []byte, error) {
if ctx == nil {
c.Fatalf("context was not passed down")
}
if req != c.req {
c.Fatalf("request was not passed down")
}
test := <-c.ch
var b []byte
var err error
switch v := test.response.(type) {
case string:
b = []byte(v)
default:
b, err = json.Marshal(v)
if err != nil {
c.Fatal(err)
}
}
resp := &http.Response{
StatusCode: test.code,
}
return resp, b, nil
}
func TestAPIClientDo(t *testing.T) {
tests := []apiClientTest{
{
response: &apiResponse{
Status: "error",
Data: json.RawMessage(`null`),
ErrorType: ErrBadData,
Error: "failed",
},
err: &Error{
Type: ErrBadData,
Msg: "failed",
},
code: statusAPIError,
expected: `null`,
},
{
response: &apiResponse{
Status: "error",
Data: json.RawMessage(`"test"`),
ErrorType: ErrTimeout,
Error: "timed out",
},
err: &Error{
Type: ErrTimeout,
Msg: "timed out",
},
code: statusAPIError,
expected: `test`,
},
{
response: "bad json",
err: &Error{
Type: ErrBadResponse,
Msg: "bad response code 400",
},
code: http.StatusBadRequest,
},
{
response: "bad json",
err: &Error{
Type: ErrBadResponse,
Msg: "invalid character 'b' looking for beginning of value",
},
code: statusAPIError,
},
{
response: &apiResponse{
Status: "success",
Data: json.RawMessage(`"test"`),
},
err: &Error{
Type: ErrBadResponse,
Msg: "inconsistent body for response code",
},
code: statusAPIError,
},
{
response: &apiResponse{
Status: "success",
Data: json.RawMessage(`"test"`),
ErrorType: ErrTimeout,
Error: "timed out",
},
err: &Error{
Type: ErrBadResponse,
Msg: "inconsistent body for response code",
},
code: statusAPIError,
},
{
response: &apiResponse{
Status: "error",
Data: json.RawMessage(`"test"`),
ErrorType: ErrTimeout,
Error: "timed out",
},
err: &Error{
Type: ErrBadResponse,
Msg: "inconsistent body for response code",
},
code: http.StatusOK,
},
}
tc := &testClient{
T: t,
ch: make(chan apiClientTest, 1),
req: &http.Request{},
}
client := &apiClient{tc}
for _, test := range tests {
tc.ch <- test
_, body, err := client.do(context.Background(), tc.req)
if test.err != nil {
if err == nil {
t.Errorf("expected error %q but got none", test.err)
continue
}
if test.err.Error() != err.Error() {
t.Errorf("unexpected error: want %q, got %q", test.err, err)
}
continue
}
if err != nil {
t.Errorf("unexpeceted error %s", err)
continue
}
want, got := test.expected, string(body)
if want != got {
t.Errorf("unexpected body: want %q, got %q", want, got)
}
}
}
type apiTestClient struct {
*testing.T
curTest apiTest
}
type apiTest struct {
do func() (interface{}, error)
inErr error
inRes interface{}
reqPath string
reqParam url.Values
reqMethod string
res interface{}
err error
}
func (c *apiTestClient) url(ep string, args map[string]string) *url.URL {
path := apiPrefix + ep
for k, v := range args {
path = strings.Replace(path, ":"+k, v, -1)
}
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u := &url.URL{
Host: "test:9090",
Path: path,
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}
return u
}
func (c *apiTestClient) do(ctx context.Context, req *http.Request) (*http.Response, []byte, error) {
test := c.curTest
if req.URL.Path != test.reqPath {
c.Errorf("unexpected request path: want %s, got %s", test.reqPath, req.URL.Path)
}
if req.Method != test.reqMethod {
c.Errorf("unexpected request method: want %s, got %s", test.reqMethod, req.Method)
}
b, err := json.Marshal(test.inRes)
if err != nil {
c.Fatal(err)
}
resp := &http.Response{}
if test.inErr != nil {
resp.StatusCode = statusAPIError
} else {
resp.StatusCode = http.StatusOK
}
return resp, b, test.inErr
}
func TestAPIs(t *testing.T) {
testTime := time.Now()
client := &apiTestClient{T: t}
queryAPI := &httpQueryAPI{
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client: client,
}
doQuery := func(q string, ts time.Time) func() (interface{}, error) {
return func() (interface{}, error) {
return queryAPI.Query(context.Background(), q, ts)
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}
}
doQueryRange := func(q string, rng Range) func() (interface{}, error) {
return func() (interface{}, error) {
return queryAPI.QueryRange(context.Background(), q, rng)
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}
}
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doLabelValues := func(label string) func() (interface{}, error) {
return func() (interface{}, error) {
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return queryAPI.LabelValues(context.Background(), label)
}
}
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queryTests := []apiTest{
{
do: doQuery("2", testTime),
inRes: &queryResult{
Type: model.ValScalar,
Result: &model.Scalar{
Value: 2,
Timestamp: model.TimeFromUnix(testTime.Unix()),
},
},
reqMethod: "GET",
reqPath: "/api/v1/query",
reqParam: url.Values{
"query": []string{"2"},
"time": []string{testTime.Format(time.RFC3339Nano)},
},
res: &model.Scalar{
Value: 2,
Timestamp: model.TimeFromUnix(testTime.Unix()),
},
},
{
do: doQuery("2", testTime),
inErr: fmt.Errorf("some error"),
reqMethod: "GET",
reqPath: "/api/v1/query",
reqParam: url.Values{
"query": []string{"2"},
"time": []string{testTime.Format(time.RFC3339Nano)},
},
err: fmt.Errorf("some error"),
},
{
do: doQueryRange("2", Range{
Start: testTime.Add(-time.Minute),
End: testTime,
Step: time.Minute,
}),
inErr: fmt.Errorf("some error"),
reqMethod: "GET",
reqPath: "/api/v1/query_range",
reqParam: url.Values{
"query": []string{"2"},
"start": []string{testTime.Add(-time.Minute).Format(time.RFC3339Nano)},
"end": []string{testTime.Format(time.RFC3339Nano)},
"step": []string{time.Minute.String()},
},
err: fmt.Errorf("some error"),
},
{
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do: doLabelValues("mylabel"),
inRes: []string{"val1", "val2"},
reqMethod: "GET",
reqPath: "/api/v1/label/mylabel/values",
res: model.LabelValues{"val1", "val2"},
},
{
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do: doLabelValues("mylabel"),
inErr: fmt.Errorf("some error"),
reqMethod: "GET",
reqPath: "/api/v1/label/mylabel/values",
err: fmt.Errorf("some error"),
},
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}
var tests []apiTest
tests = append(tests, queryTests...)
for _, test := range tests {
client.curTest = test
res, err := test.do()
if test.err != nil {
if err == nil {
t.Errorf("expected error %q but got none", test.err)
continue
}
if err.Error() != test.err.Error() {
t.Errorf("unexpected error: want %s, got %s", test.err, err)
}
continue
}
if err != nil {
t.Errorf("unexpected error: %s", err)
continue
}
if !reflect.DeepEqual(res, test.res) {
t.Errorf("unexpected result: want %v, got %v", test.res, res)
}
}
}