Move all the code to a lib folder

lib/database/users_test.go

@@ -0,0 +1,43 @@
+package database
+
+import "testing"
+
+const (
+	name, pass = "user", "mypass"
+)
+
+func TestUserEmpty(t *testing.T) {
+	db := Init(test_host, test_coll)
+	defer db.del()
+
+	if db.User("").Valid("") {
+		t.Errorf("user.Valid() with an empty password return true")
+	}
+}
+
+func TestAddUser(t *testing.T) {
+	db := Init(test_host, test_coll)
+	defer db.del()
+
+	tAddUser(t, db)
+	if !db.User(name).Valid(pass) {
+		t.Errorf("user.Valid() return false for a valid user")
+	}
+}
+
+func TestEmptyUsername(t *testing.T) {
+	db := Init(test_host, test_coll)
+	defer db.del()
+
+	tAddUser(t, db)
+	if db.User("").Valid(pass) {
+		t.Errorf("user.Valid() return true for an invalid user")
+	}
+}
+
+func tAddUser(t *testing.T, db *DB) {
+	err := db.AddUser(name, pass)
+	if err != nil {
+		t.Errorf("db.Adduser(", name, ", ", pass, ") return an error: ", err)
+	}
+}