whatismyip/router/dns_test.go

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2024-04-12 17:26:48 +00:00
package router
import (
"net/http"
"net/http/httptest"
"net/url"
"strings"
"testing"
validator "github.com/dcarrillo/whatismyip/internal/validator/uuid"
"github.com/gin-gonic/gin"
"github.com/google/uuid"
"github.com/patrickmn/go-cache"
"github.com/stretchr/testify/assert"
)
func TestGetDNSDiscoveryHandler(t *testing.T) {
store := cache.New(cache.NoExpiration, cache.NoExpiration)
handler := GetDNSDiscoveryHandler(store, domain, "")
t.Run("calls next if host does not have domain suffix", func(t *testing.T) {
req, _ := http.NewRequest("GET", "/", nil)
req.Header.Set(trustedHeader, testIP.ipv4)
req.Host = "example.com"
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = req
handler(c)
app.ServeHTTP(w, req)
assert.Equal(t, http.StatusOK, w.Code)
assert.Equal(t, testIP.ipv4+"\n", w.Body.String())
})
t.Run("redirects if host is domain", func(t *testing.T) {
req, _ := http.NewRequest("GET", "/", nil)
req.Host = domain
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = req
handler(c)
assert.Equal(t, http.StatusFound, w.Code)
r, err := url.Parse(w.Header().Get("Location"))
assert.NoError(t, err)
assert.True(t, validator.IsValid(strings.Split(r.Host, ".")[0]))
assert.Equal(t, domain, strings.Join(strings.Split(r.Host, ".")[1:], "."))
})
}
func TestHandleDNS(t *testing.T) {
store := cache.New(cache.NoExpiration, cache.NoExpiration)
u := uuid.New().String()
tests := []struct {
name string
subDomain string
stored any
}{
{
name: "not found if the subdomain is not a valid uuid",
subDomain: "not-uuid",
stored: "",
},
{
name: "not found if the ip is not found in the store",
subDomain: u,
stored: "",
},
{
name: "not found if the ip is in store but is not valid",
subDomain: u,
stored: "bogus",
},
{
name: "not found if the store contains no string",
subDomain: u,
stored: 20,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
req, _ := http.NewRequest("GET", "/", nil)
req.Host = tt.subDomain + "." + domain
if tt.stored != "" {
store.Add(tt.subDomain, tt.stored, cache.DefaultExpiration)
}
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = req
handleDNS(c, store)
assert.Equal(t, http.StatusNotFound, w.Code)
})
}
}
func TestAcceptDNSRequest(t *testing.T) {
store := cache.New(cache.NoExpiration, cache.NoExpiration)
tests := []struct {
name string
accept string
want string
}{
{
name: "returns json dns data",
accept: "application/json",
want: jsonDNSIPv4,
},
{
name: "return plan text dns data",
accept: "text/plain",
want: plainDNSIPv4,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
req, _ := http.NewRequest("GET", "/", nil)
u := uuid.New().String()
req.Host = u + "." + domain
req.Header.Add("Accept", tt.accept)
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = req
store.Add(u, testIP.ipv4, cache.DefaultExpiration)
handleDNS(c, store)
assert.Equal(t, http.StatusOK, w.Code)
assert.Equal(t, tt.want, w.Body.String())
})
}
}