package webutils_test

import (
	"io"
	"net/http/httptest"
	"testing"

	webutils "git.mstar.dev/mstar/goutils/http"
)

func TestSendJsonOk(t *testing.T) {
	recorder := httptest.NewRecorder()
	err := webutils.SendJson(recorder, map[string]any{
		"a": 1,
		"b": "b",
		"c": nil,
	})
	if err != nil {
		t.Fatalf("error while sending json: %v", err)
	}
	res := recorder.Result()
	if ctype := res.Header.Get("Content-Type"); ctype != "application/json" {
		t.Fatalf("expected content type \"application/json\", got %v", ctype)
	}
	// httptest guarantees body to be functional and only returned error will be EOL
	// so no need to watch for error
	bodyBytes, _ := io.ReadAll(res.Body)
	body := string(bodyBytes)
	expected := `{"a":1,"b":"b","c":null}`
	if body != expected {
		t.Fatalf("Expected %v as body, got %v", expected, body)
	}
}

func TestSendJsonNotMarshallable(t *testing.T) {
	recorder := httptest.NewRecorder()
	err := webutils.SendJson(recorder, map[string]any{
		"a": 1,
		"b": "b",
		"c": make(chan any),
	})
	if err == nil {
		t.Fatal("expected json marshalling error")
	}
}