1 files changed, 111 insertions, 0 deletions
diff --git a/pkg/database/users_test.go b/pkg/database/users_test.go
new file mode 100644
index 0000000..4b87d90
--- /dev/null
+++ b/pkg/database/users_test.go
@@ -0,0 +1,111 @@
+package database
+
+import (
+	"reflect"
+	"testing"
+
+	"git.adyxax.org/adyxax/trains/pkg/model"
+	"github.com/DATA-DOG/go-sqlmock"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"golang.org/x/crypto/bcrypt"
+)
+
+func TestCreateUser(t *testing.T) {
+	// test db setup
+	db, err := InitDB("sqlite3", "file::memory:?_foreign_keys=on")
+	require.NoError(t, err)
+	err = db.Migrate()
+	require.NoError(t, err)
+	// a normal user
+	normalUser := model.UserRegistration{
+		Username: "testUsername",
+		Password: "testPassword",
+		Email:    "testEmail",
+	}
+	// Test another normal user
+	normalUser2 := model.UserRegistration{
+		Username: "testUsername2",
+		Password: "yei*j2Ien2xa?g6bieh~i=asoo5ii7Bi",
+		Email:    "testEmail",
+	}
+	// Test cases
+	testCases := []struct {
+		name          string
+		db            *DBEnv
+		input         *model.UserRegistration
+		expected      int
+		expectedError interface{}
+	}{
+		{"Normal user", db, &normalUser, 1, nil},
+		{"Duplicate user", db, &normalUser, 0, &QueryError{}},
+		{"Normal user 2", db, &normalUser2, 2, nil},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			valid, err := tc.db.CreateUser(tc.input)
+			if tc.expectedError != nil {
+				require.Error(t, err)
+				assert.Equalf(t, reflect.TypeOf(err), reflect.TypeOf(tc.expectedError), "Invalid error type. Got %s but expected %s", reflect.TypeOf(err), reflect.TypeOf(tc.expectedError))
+				require.Nil(t, valid)
+			} else {
+				require.NoError(t, err)
+				assert.Equal(t, tc.expected, valid.Id)
+			}
+		})
+	}
+	// Test for bad password
+	passwordFunction = func(password []byte, cost int) ([]byte, error) { return nil, newPasswordError(nil) }
+	valid, err := db.CreateUser(&normalUser)
+	passwordFunction = bcrypt.GenerateFromPassword
+	require.Error(t, err)
+	require.Nil(t, valid)
+	assert.Equalf(t, reflect.TypeOf(err), reflect.TypeOf(&PasswordError{}), "Invalid error type. Got %s but expected %s", reflect.TypeOf(err), reflect.TypeOf(&PasswordError{}))
+}
+
+func TestCreateUserWithSQLMock(t *testing.T) {
+	// Transaction begin error
+	dbBeginError, _, err := sqlmock.New()
+	if err != nil {
+		t.Fatalf("an error '%s' was not expected when opening a stub database connection", err)
+	}
+	defer dbBeginError.Close()
+	// Transaction LastInsertId not supported
+	dbLastInsertIdError, mockLastInsertIdError, err := sqlmock.New()
+	if err != nil {
+		t.Fatalf("an error '%s' was not expected when opening a stub database connection", err)
+	}
+	defer dbLastInsertIdError.Close()
+	mockLastInsertIdError.ExpectBegin()
+	mockLastInsertIdError.ExpectExec(`INSERT INTO`).WillReturnResult(sqlmock.NewErrorResult(&TransactionError{"test", nil}))
+	// Transaction commit error
+	dbCommitError, mockCommitError, err := sqlmock.New()
+	if err != nil {
+		t.Fatalf("an error '%s' was not expected when opening a stub database connection", err)
+	}
+	defer dbCommitError.Close()
+	mockCommitError.ExpectBegin()
+	mockCommitError.ExpectExec(`INSERT INTO`).WillReturnResult(sqlmock.NewResult(1, 1))
+	// Test cases
+	testCases := []struct {
+		name          string
+		db            *DBEnv
+		expectedError interface{}
+	}{
+		{"begin transaction error", &DBEnv{db: dbBeginError}, &TransactionError{}},
+		{"last insert id transaction error", &DBEnv{db: dbLastInsertIdError}, &TransactionError{}},
+		{"commit transaction error", &DBEnv{db: dbCommitError}, &TransactionError{}},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			valid, err := tc.db.CreateUser(&model.UserRegistration{})
+			if tc.expectedError != nil {
+				require.Error(t, err)
+				assert.Equalf(t, reflect.TypeOf(err), reflect.TypeOf(tc.expectedError), "Invalid error type. Got %s but expected %s", reflect.TypeOf(err), reflect.TypeOf(tc.expectedError))
+				require.Nil(t, valid)
+			} else {
+				require.NoError(t, err)
+			}
+		})
+	}
+}