traefik/pkg/middlewares/gatewayapi/headermodifier/request_header_modifier_test.go

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package headermodifier
import (
"context"
"net/http"
"net/http/httptest"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/traefik/traefik/v3/pkg/config/dynamic"
"github.com/traefik/traefik/v3/pkg/testhelpers"
)
func TestRequestHeaderModifier(t *testing.T) {
testCases := []struct {
desc string
config dynamic.RequestHeaderModifier
requestHeaders http.Header
expectedHeaders http.Header
}{
{
desc: "no config",
config: dynamic.RequestHeaderModifier{},
expectedHeaders: map[string][]string{},
},
{
desc: "set header",
config: dynamic.RequestHeaderModifier{
Set: map[string]string{"Foo": "Bar"},
},
expectedHeaders: map[string][]string{"Foo": {"Bar"}},
},
{
desc: "set header with existing headers",
config: dynamic.RequestHeaderModifier{
Set: map[string]string{"Foo": "Bar"},
},
requestHeaders: map[string][]string{"Foo": {"Baz"}, "Bar": {"Foo"}},
expectedHeaders: map[string][]string{"Foo": {"Bar"}, "Bar": {"Foo"}},
},
{
desc: "set multiple headers with existing headers",
config: dynamic.RequestHeaderModifier{
Set: map[string]string{"Foo": "Bar", "Bar": "Foo"},
},
requestHeaders: map[string][]string{"Foo": {"Baz"}, "Bar": {"Foobar"}},
expectedHeaders: map[string][]string{"Foo": {"Bar"}, "Bar": {"Foo"}},
},
{
desc: "add header",
config: dynamic.RequestHeaderModifier{
Add: map[string]string{"Foo": "Bar"},
},
expectedHeaders: map[string][]string{"Foo": {"Bar"}},
},
{
desc: "add header with existing headers",
config: dynamic.RequestHeaderModifier{
Add: map[string]string{"Foo": "Bar"},
},
requestHeaders: map[string][]string{"Foo": {"Baz"}, "Bar": {"Foo"}},
expectedHeaders: map[string][]string{"Foo": {"Baz", "Bar"}, "Bar": {"Foo"}},
},
{
desc: "add multiple headers with existing headers",
config: dynamic.RequestHeaderModifier{
Add: map[string]string{"Foo": "Bar", "Bar": "Foo"},
},
requestHeaders: map[string][]string{"Foo": {"Baz"}, "Bar": {"Foobar"}},
expectedHeaders: map[string][]string{"Foo": {"Baz", "Bar"}, "Bar": {"Foobar", "Foo"}},
},
{
desc: "remove header",
config: dynamic.RequestHeaderModifier{
Remove: []string{"Foo"},
},
expectedHeaders: map[string][]string{},
},
{
desc: "remove header with existing headers",
config: dynamic.RequestHeaderModifier{
Remove: []string{"Foo"},
},
requestHeaders: map[string][]string{"Foo": {"Baz"}, "Bar": {"Foo"}},
expectedHeaders: map[string][]string{"Bar": {"Foo"}},
},
{
desc: "remove multiple headers with existing headers",
config: dynamic.RequestHeaderModifier{
Remove: []string{"Foo", "Bar"},
},
requestHeaders: map[string][]string{"Foo": {"Bar"}, "Bar": {"Foo"}, "Baz": {"Bar"}},
expectedHeaders: map[string][]string{"Baz": {"Bar"}},
},
}
for _, test := range testCases {
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
var gotHeaders http.Header
next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
gotHeaders = r.Header
})
handler, err := NewRequestHeaderModifier(context.Background(), next, test.config, "foo-request-header-modifier")
require.NoError(t, err)
req := testhelpers.MustNewRequest(http.MethodGet, "http://localhost", nil)
if test.requestHeaders != nil {
req.Header = test.requestHeaders
}
resp := httptest.NewRecorder()
handler.ServeHTTP(resp, req)
assert.Equal(t, test.expectedHeaders, gotHeaders)
})
}
}