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package render
import (
"encoding/json"
"fmt"
"io"
"math"
"net/http"
"net/http/httptest"
"strconv"
"testing"
"github.com/stretchr/testify/assert"
"github.com/smallstep/certificates/logging"
)
func TestJSON(t *testing.T) {
rec := httptest.NewRecorder()
rw := logging.NewResponseLogger(rec)
r := httptest.NewRequest("POST", "/test", http.NoBody)
JSON(rw, r, map[string]interface{}{"foo": "bar"})
assert.Equal(t, http.StatusOK, rec.Result().StatusCode)
assert.Equal(t, "application/json", rec.Header().Get("Content-Type"))
assert.Equal(t, "{\"foo\":\"bar\"}\n", rec.Body.String())
assert.Empty(t, rw.Fields())
}
func TestJSONPanicsOnUnsupportedType(t *testing.T) {
jsonPanicTest[json.UnsupportedTypeError](t, make(chan struct{}))
}
func TestJSONPanicsOnUnsupportedValue(t *testing.T) {
jsonPanicTest[json.UnsupportedValueError](t, math.NaN())
}
func TestJSONPanicsOnMarshalerError(t *testing.T) {
var v erroneousJSONMarshaler
jsonPanicTest[json.MarshalerError](t, v)
}
type erroneousJSONMarshaler struct{}
func (erroneousJSONMarshaler) MarshalJSON() ([]byte, error) {
return nil, assert.AnError
}
func jsonPanicTest[T json.UnsupportedTypeError | json.UnsupportedValueError | json.MarshalerError](t *testing.T, v any) {
t.Helper()
defer func() {
var err error
if r := recover(); r == nil {
t.Fatal("expected panic")
} else if e, ok := r.(error); !ok {
t.Fatalf("did not panic with an error (%T)", r)
} else {
err = e
}
var e *T
assert.ErrorAs(t, err, &e)
}()
r := httptest.NewRequest("POST", "/test", http.NoBody)
JSON(httptest.NewRecorder(), r, v)
}
type renderableError struct {
Code int `json:"-"`
Message string `json:"message"`
}
func (err renderableError) Error() string {
return err.Message
}
func (err renderableError) Render(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "something/custom")
JSONStatus(w, r, err, err.Code)
}
type statusedError struct {
Contents string
}
func (err statusedError) Error() string { return err.Contents }
func (statusedError) StatusCode() int { return 432 }
func TestError(t *testing.T) {
cases := []struct {
err error
code int
body string
header string
}{
0: {
err: renderableError{532, "some string"},
code: 532,
body: "{\"message\":\"some string\"}\n",
header: "something/custom",
},
1: {
err: statusedError{"123"},
code: 432,
body: "{\"Contents\":\"123\"}\n",
header: "application/json",
},
}
for caseIndex := range cases {
kase := cases[caseIndex]
t.Run(strconv.Itoa(caseIndex), func(t *testing.T) {
rec := httptest.NewRecorder()
r := httptest.NewRequest("POST", "/test", http.NoBody)
Error(rec, r, kase.err)
assert.Equal(t, kase.code, rec.Result().StatusCode)
assert.Equal(t, kase.body, rec.Body.String())
assert.Equal(t, kase.header, rec.Header().Get("Content-Type"))
})
}
}
type causedError struct {
cause error
}
func (err causedError) Error() string { return fmt.Sprintf("cause: %s", err.cause) }
func (err causedError) Cause() error { return err.cause }
func TestStatusCodeFromError(t *testing.T) {
cases := []struct {
err error
exp int
}{
0: {nil, http.StatusInternalServerError},
1: {io.EOF, http.StatusInternalServerError},
2: {statusedError{"123"}, 432},
3: {causedError{statusedError{"432"}}, 432},
}
for caseIndex, kase := range cases {
assert.Equal(t, kase.exp, statusCodeFromError(kase.err), "case: %d", caseIndex)
}
}
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