feat: expose Everyone group through UI (#9117)

- Allows setting quota allowances on the 'Everyone' group.

coderd/database/tx_test.go

@@ -0,0 +1,81 @@
+package database_test
+
+import (
+	"database/sql"
+	"testing"
+
+	"github.com/golang/mock/gomock"
+	"github.com/lib/pq"
+	"github.com/stretchr/testify/require"
+	"golang.org/x/xerrors"
+
+	"github.com/coder/coder/coderd/database"
+	"github.com/coder/coder/coderd/database/dbmock"
+)
+
+func TestReadModifyUpdate_OK(t *testing.T) {
+	t.Parallel()
+
+	mDB := dbmock.NewMockStore(gomock.NewController(t))
+
+	mDB.EXPECT().
+		InTx(gomock.Any(), &sql.TxOptions{Isolation: sql.LevelRepeatableRead}).
+		Times(1).
+		Return(nil)
+	err := database.ReadModifyUpdate(mDB, func(tx database.Store) error {
+		return nil
+	})
+	require.NoError(t, err)
+}
+
+func TestReadModifyUpdate_RetryOK(t *testing.T) {
+	t.Parallel()
+
+	mDB := dbmock.NewMockStore(gomock.NewController(t))
+
+	firstUpdate := mDB.EXPECT().
+		InTx(gomock.Any(), &sql.TxOptions{Isolation: sql.LevelRepeatableRead}).
+		Times(1).
+		Return(&pq.Error{Code: pq.ErrorCode("40001")})
+	mDB.EXPECT().
+		InTx(gomock.Any(), &sql.TxOptions{Isolation: sql.LevelRepeatableRead}).
+		After(firstUpdate).
+		Times(1).
+		Return(nil)
+
+	err := database.ReadModifyUpdate(mDB, func(tx database.Store) error {
+		return nil
+	})
+	require.NoError(t, err)
+}
+
+func TestReadModifyUpdate_HardError(t *testing.T) {
+	t.Parallel()
+
+	mDB := dbmock.NewMockStore(gomock.NewController(t))
+
+	mDB.EXPECT().
+		InTx(gomock.Any(), &sql.TxOptions{Isolation: sql.LevelRepeatableRead}).
+		Times(1).
+		Return(xerrors.New("a bad thing happened"))
+
+	err := database.ReadModifyUpdate(mDB, func(tx database.Store) error {
+		return nil
+	})
+	require.ErrorContains(t, err, "a bad thing happened")
+}
+
+func TestReadModifyUpdate_TooManyRetries(t *testing.T) {
+	t.Parallel()
+
+	mDB := dbmock.NewMockStore(gomock.NewController(t))
+
+	mDB.EXPECT().
+		InTx(gomock.Any(), &sql.TxOptions{Isolation: sql.LevelRepeatableRead}).
+		Times(5).
+		Return(&pq.Error{Code: pq.ErrorCode("40001")})
+	err := database.ReadModifyUpdate(mDB, func(tx database.Store) error {
+		return nil
+	})
+	require.ErrorContains(t, err, "too many errors")
+}