enable reloading, temporarily modify stake/unstake system test to test laod/reload

Author: aaronc

iavlx/commit_multi_tree.go

@@ -295,12 +295,11 @@ func (db *CommitMultiTree) loadStore(key storetypes.StoreKey, typ storetypes.Sto
 	switch typ {
 	case storetypes.StoreTypeIAVL, storetypes.StoreTypeDB:
 		dir := filepath.Join(db.dir, key.Name())
-		if _, err := os.Stat(dir); !os.IsNotExist(err) {
-			return nil, fmt.Errorf("store directory %s already exists, reloading isn't supported yet", dir)
-		}
-		err := os.MkdirAll(dir, 0o755)
-		if err != nil {
-			return nil, fmt.Errorf("failed to create store dir %s: %w", dir, err)
+		if _, err := os.Stat(dir); os.IsNotExist(err) {
+			err := os.MkdirAll(dir, 0o755)
+			if err != nil {
+				return nil, fmt.Errorf("failed to create store dir %s: %w", dir, err)
+			}
 		}
 		return NewCommitTree(dir, db.opts, db.logger.With("store", key.Name()))
 	case storetypes.StoreTypeTransient:

tests/systemtests/staking_test.go

@@ -36,6 +36,10 @@ func TestStakeUnstake(t *testing.T) {
 	rsp = cli.Run("tx", "staking", "delegate", valAddr, "10000stake", "--from="+account1Addr, "--fees=1stake")
 	systemtests.RequireTxSuccess(t, rsp)
 
+	sut.StopChain()
+	sut.AwaitChainStopped()
+	sut.StartChain(t)
+
 	t.Log(cli.QueryBalance(account1Addr, "stake"))
 	assert.Equal(t, int64(9989999), cli.QueryBalance(account1Addr, "stake"))
 
@@ -47,6 +51,10 @@ func TestStakeUnstake(t *testing.T) {
 	rsp = cli.Run("tx", "staking", "unbond", valAddr, "5000stake", "--from="+account1Addr, "--fees=1stake")
 	systemtests.RequireTxSuccess(t, rsp)
 
+	sut.StopChain()
+	sut.AwaitChainStopped()
+	sut.StartChain(t)
+
 	rsp = cli.CustomQuery("q", "staking", "delegation", account1Addr, valAddr)
 	assert.Equal(t, "5000", gjson.Get(rsp, "delegation_response.balance.amount").String(), rsp)
 	assert.Equal(t, "stake", gjson.Get(rsp, "delegation_response.balance.denom").String(), rsp)