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middleware_test.go
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middleware_test.go
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package minimalmux
import (
"fmt"
"net/http"
"net/http/httptest"
"testing"
)
func testMiddleware(s string) func(http.Handler) http.Handler {
return func(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(fmt.Sprintf("%s\n", s)))
h.ServeHTTP(w, r)
})
}
}
var testHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("test\n"))
})
func TestAppend(t *testing.T) {
t.Run("empty", func(t *testing.T) {
ms := NewMiddlewares()
w := httptest.NewRecorder()
r, err := http.NewRequest("GET", "/", nil)
if err != nil {
t.Fatal(err)
}
ms.Handle(testHandler).ServeHTTP(w, r)
expected := "test\n"
if w.Body.String() != expected {
t.Fatalf("expected %q, got %q", expected, w.Body.String())
}
})
t.Run("exists", func(t *testing.T) {
aFunc := testMiddleware("a")
bFunc := testMiddleware("b")
ms := NewMiddlewares()
ms = ms.Append(aFunc).Append(bFunc)
w := httptest.NewRecorder()
r, err := http.NewRequest("GET", "/", nil)
if err != nil {
t.Fatal(err)
}
ms.Handle(testHandler).ServeHTTP(w, r)
expected := "a\nb\ntest\n"
if w.Body.String() != expected {
t.Fatalf("expected %q, got %q", expected, w.Body.String())
}
})
}
func TestPrepend(t *testing.T) {
aFunc := testMiddleware("a")
bFunc := testMiddleware("b")
ms := NewMiddlewares()
ms = ms.Prepend(aFunc).Prepend(bFunc)
w := httptest.NewRecorder()
r, err := http.NewRequest("GET", "/", nil)
if err != nil {
t.Fatal(err)
}
ms.Handle(testHandler).ServeHTTP(w, r)
expected := "b\na\ntest\n"
if w.Body.String() != expected {
t.Fatalf("expected %q, got %q", expected, w.Body.String())
}
}
func TestMiddlewaresHandleFunc(t *testing.T) {
ms := NewMiddlewares()
w := httptest.NewRecorder()
r, err := http.NewRequest("GET", "/", nil)
if err != nil {
t.Fatal(err)
}
ms.HandleFunc(testHandler).ServeHTTP(w, r)
expected := "test\n"
if w.Body.String() != expected {
t.Fatalf("expected %q, got %q", expected, w.Body.String())
}
}