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webmiddleware_test.go
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// Copyright © 2020 The Things Network Foundation, The Things Industries B.V.
//
// 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 webmiddleware_test
import (
"net/http"
"net/http/httptest"
"testing"
"github.com/smartystreets/assertions"
"go.thethings.network/lorawan-stack/v3/pkg/util/test/assertions/should"
. "go.thethings.network/lorawan-stack/v3/pkg/webmiddleware"
)
func TestChain(t *testing.T) {
a := assertions.New(t)
var trace []string
middleware := []MiddlewareFunc{
func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
trace = append(trace, "outer begin")
next.ServeHTTP(w, r)
trace = append(trace, "outer end")
})
},
func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
trace = append(trace, "inner begin")
next.ServeHTTP(w, r)
trace = append(trace, "inner end")
})
},
}
chain := Chain(middleware, http.HandlerFunc(func(_ http.ResponseWriter, _ *http.Request) {
trace = append(trace, "handler")
}))
chain.ServeHTTP(httptest.NewRecorder(), httptest.NewRequest(http.MethodGet, "/", nil))
a.So(trace, should.Resemble, []string{"outer begin", "inner begin", "handler", "inner end", "outer end"})
}
func TestConditional(t *testing.T) {
a := assertions.New(t)
flag := false
middleware := Conditional(
func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
flag = true
next.ServeHTTP(w, r)
})
},
func(r *http.Request) bool {
return r.Header.Get("X-Condition") == "foo"
},
)
r := httptest.NewRequest(http.MethodGet, "/", nil)
r.Header.Set("X-Condition", "bar")
rec := httptest.NewRecorder()
middleware(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
a.So(flag, should.Equal, false)
})).ServeHTTP(rec, r)
r = httptest.NewRequest(http.MethodGet, "/", nil)
r.Header.Set("X-Condition", "foo")
rec = httptest.NewRecorder()
middleware(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
a.So(flag, should.Equal, true)
})).ServeHTTP(rec, r)
}