added user signup feature

user_test.go

@@ -0,0 +1,67 @@
+package main
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPostUserHandler_Working(t *testing.T) {
+	userJson :=
+		`{
+		  "username": "artlef",
+			"password": "123456789"
+		}`
+	testPostUserHandler(t, userJson, 200)
+}
+
+func TestPostUserHandler_UsernameTooSmall(t *testing.T) {
+	userJson :=
+		`{
+		  "username": "a",
+			"password": "123456789"
+		}`
+	testPostUserHandler(t, userJson, 400)
+}
+
+func TestPostUserHandler_UsernameTooBig(t *testing.T) {
+	userJson :=
+		`{
+		  "username": "thisusernameistoolong",
+			"password": "123456789"
+		}`
+	testPostUserHandler(t, userJson, 400)
+}
+
+func TestPostUserHandler_PasswordTooSmall(t *testing.T) {
+	userJson :=
+		`{
+		  "username": "thisusernameisok",
+			"password": "lol"
+		}`
+	testPostUserHandler(t, userJson, 400)
+}
+
+func TestPostUserHandler_PasswordTooBig(t *testing.T) {
+	userJson :=
+		`{
+		  "username": "thisusernameisok",
+			"password": "According to all known laws of aviation, there is no way a bee should be able to fly. Its wings are too small to get its fat little body off the ground."
+		}`
+	testPostUserHandler(t, userJson, 400)
+}
+
+func testPostUserHandler(t *testing.T, userJson string, expectedCode int) {
+	router := testSetup()
+	w := httptest.NewRecorder()
+
+	req, _ := http.NewRequest("POST", "/auth/signup",
+		strings.NewReader(string(userJson)))
+	router.ServeHTTP(w, req)
+
+	assert.Equal(t, expectedCode, w.Code)
+
+}