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http_test.go
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http_test.go
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// Copyright 2020 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package charmhub
import (
"bytes"
"context"
"fmt"
"net/http"
"net/http/httptest"
"github.com/golang/mock/gomock"
"github.com/juju/errors"
jujuhttp "github.com/juju/http/v2"
"github.com/juju/testing"
jc "github.com/juju/testing/checkers"
gc "gopkg.in/check.v1"
)
type APIRequesterSuite struct {
testing.IsolationSuite
}
var _ = gc.Suite(&APIRequesterSuite{})
func (s *APIRequesterSuite) TestDo(c *gc.C) {
ctrl := gomock.NewController(c)
defer ctrl.Finish()
req := MustNewRequest(c, "http://api.foo.bar")
mockTransport := NewMockTransport(ctrl)
mockTransport.EXPECT().Do(req).Return(emptyResponse(), nil)
requester := NewAPIRequester(mockTransport, &FakeLogger{})
resp, err := requester.Do(req)
c.Assert(err, jc.ErrorIsNil)
c.Assert(resp.StatusCode, gc.Equals, http.StatusOK)
}
func (s *APIRequesterSuite) TestDoWithFailure(c *gc.C) {
ctrl := gomock.NewController(c)
defer ctrl.Finish()
req := MustNewRequest(c, "http://api.foo.bar")
mockTransport := NewMockTransport(ctrl)
mockTransport.EXPECT().Do(req).Return(emptyResponse(), errors.Errorf("boom"))
requester := NewAPIRequester(mockTransport, &FakeLogger{})
_, err := requester.Do(req)
c.Assert(err, gc.Not(jc.ErrorIsNil))
}
func (s *APIRequesterSuite) TestDoWithInvalidContentType(c *gc.C) {
ctrl := gomock.NewController(c)
defer ctrl.Finish()
req := MustNewRequest(c, "http://api.foo.bar")
mockTransport := NewMockTransport(ctrl)
mockTransport.EXPECT().Do(req).Return(invalidContentTypeResponse(), nil)
requester := NewAPIRequester(mockTransport, &FakeLogger{})
_, err := requester.Do(req)
c.Assert(err, gc.Not(jc.ErrorIsNil))
}
func (s *APIRequesterSuite) TestDoWithNotFoundResponse(c *gc.C) {
ctrl := gomock.NewController(c)
defer ctrl.Finish()
req := MustNewRequest(c, "http://api.foo.bar")
mockTransport := NewMockTransport(ctrl)
mockTransport.EXPECT().Do(req).Return(notFoundResponse(), nil)
requester := NewAPIRequester(mockTransport, &FakeLogger{})
resp, err := requester.Do(req)
c.Assert(err, jc.ErrorIsNil)
c.Assert(resp.StatusCode, gc.Equals, http.StatusNotFound)
}
type RESTSuite struct {
testing.IsolationSuite
}
var _ = gc.Suite(&RESTSuite{})
func (s *RESTSuite) TestGet(c *gc.C) {
ctrl := gomock.NewController(c)
defer ctrl.Finish()
var recievedURL string
mockTransport := NewMockTransport(ctrl)
mockTransport.EXPECT().Do(gomock.Any()).Do(func(req *http.Request) {
recievedURL = req.URL.String()
}).Return(emptyResponse(), nil)
base := MustMakePath(c, "http://api.foo.bar")
client := NewHTTPRESTClient(mockTransport, nil)
var result interface{}
_, err := client.Get(context.TODO(), base, &result)
c.Assert(err, jc.ErrorIsNil)
c.Assert(recievedURL, gc.Equals, "http://api.foo.bar")
}
func (s *RESTSuite) TestGetWithInvalidContext(c *gc.C) {
ctrl := gomock.NewController(c)
defer ctrl.Finish()
mockTransport := NewMockTransport(ctrl)
client := NewHTTPRESTClient(mockTransport, nil)
base := MustMakePath(c, "http://api.foo.bar")
var result interface{}
_, err := client.Get(nil, base, &result)
c.Assert(err, gc.Not(jc.ErrorIsNil))
}
func (s *RESTSuite) TestGetWithFailure(c *gc.C) {
ctrl := gomock.NewController(c)
defer ctrl.Finish()
mockTransport := NewMockTransport(ctrl)
mockTransport.EXPECT().Do(gomock.Any()).Return(emptyResponse(), errors.Errorf("boom"))
client := NewHTTPRESTClient(mockTransport, nil)
base := MustMakePath(c, "http://api.foo.bar")
var result interface{}
_, err := client.Get(context.TODO(), base, &result)
c.Assert(err, gc.Not(jc.ErrorIsNil))
}
func (s *RESTSuite) TestGetWithFailureRetry(c *gc.C) {
var called int
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
called++
w.WriteHeader(http.StatusTooManyRequests)
}))
defer server.Close()
transport := RequestHTTPTransport(nil, jujuhttp.RetryPolicy{
Attempts: 3,
Delay: testing.ShortWait,
MaxDelay: testing.LongWait,
})(&FakeLogger{})
client := NewHTTPRESTClient(transport, nil)
base := MustMakePath(c, server.URL)
var result interface{}
_, err := client.Get(context.TODO(), base, &result)
c.Assert(err, gc.Not(jc.ErrorIsNil))
c.Assert(called, gc.Equals, 3)
}
func (s *RESTSuite) TestGetWithFailureWithoutRetry(c *gc.C) {
var called int
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
called++
w.WriteHeader(http.StatusInternalServerError)
}))
defer server.Close()
transport := RequestHTTPTransport(nil, jujuhttp.RetryPolicy{
Attempts: 3,
Delay: testing.ShortWait,
MaxDelay: testing.LongWait,
})(&FakeLogger{})
client := NewHTTPRESTClient(transport, nil)
base := MustMakePath(c, server.URL)
var result interface{}
_, err := client.Get(context.TODO(), base, &result)
c.Assert(err, gc.Not(jc.ErrorIsNil))
c.Assert(called, gc.Equals, 1)
}
func (s *RESTSuite) TestGetWithNoRetry(c *gc.C) {
var called int
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
called++
w.Header().Set("content-type", "application/json")
w.WriteHeader(http.StatusOK)
fmt.Fprintln(w, "{}")
}))
defer server.Close()
transport := RequestHTTPTransport(nil, jujuhttp.RetryPolicy{
Attempts: 3,
Delay: testing.ShortWait,
MaxDelay: testing.LongWait,
})(&FakeLogger{})
client := NewHTTPRESTClient(transport, nil)
base := MustMakePath(c, server.URL)
var result interface{}
_, err := client.Get(context.TODO(), base, &result)
c.Assert(err, jc.ErrorIsNil)
c.Assert(called, gc.Equals, 1)
}
func (s *RESTSuite) TestGetWithUnmarshalFailure(c *gc.C) {
ctrl := gomock.NewController(c)
defer ctrl.Finish()
mockTransport := NewMockTransport(ctrl)
mockTransport.EXPECT().Do(gomock.Any()).Return(invalidResponse(), nil)
client := NewHTTPRESTClient(mockTransport, nil)
base := MustMakePath(c, "http://api.foo.bar")
var result interface{}
_, err := client.Get(context.TODO(), base, &result)
c.Assert(err, gc.Not(jc.ErrorIsNil))
}
func (s *RESTSuite) TestComposeHeaders(c *gc.C) {
clientHeaders := http.Header{
"User-Agent": []string{"Juju/3.14.159"},
}
requestHeaders := http.Header{
"Something-Else": []string{"foo"},
}
client := NewHTTPRESTClient(nil, clientHeaders)
got := client.composeHeaders(requestHeaders)
c.Assert(got, gc.DeepEquals, http.Header{
"User-Agent": []string{"Juju/3.14.159"},
"Something-Else": []string{"foo"},
})
}
func emptyResponse() *http.Response {
return &http.Response{
Header: MakeContentTypeHeader("application/json"),
StatusCode: http.StatusOK,
Body: MakeNopCloser(bytes.NewBufferString("{}")),
}
}
func invalidResponse() *http.Response {
return &http.Response{
Header: MakeContentTypeHeader("application/json"),
StatusCode: http.StatusOK,
Body: MakeNopCloser(bytes.NewBufferString("/\\!")),
}
}
func invalidContentTypeResponse() *http.Response {
return &http.Response{
Header: MakeContentTypeHeader("text/plain"),
StatusCode: http.StatusNotFound,
Body: MakeNopCloser(bytes.NewBufferString("")),
}
}
func notFoundResponse() *http.Response {
return &http.Response{
Header: MakeContentTypeHeader("application/json"),
StatusCode: http.StatusNotFound,
Body: MakeNopCloser(bytes.NewBufferString(`
{
"code":"404",
"message":"not-found"
}
`)),
}
}