Fix txmgr test failure - CouchDB query limit

Test failure:
FAIL: TestIteratorWithDeletes
panic: interface conversion: ledger.QueryResult is nil, not *ledger.KV

Fix is to set the default ledger.state.queryLimit,
which was changed in https://gerrit.hyperledger.org/r/#/c/6683/.

Change-Id: Ic8f2f2057e75d5fdab7982214b022875f3888a8f
Signed-off-by: denyeart <[email protected]>

Author: denyeart

core/ledger/kvledger/txmgmt/txmgr/commontests/txmgr_test.go

@@ -24,8 +24,13 @@ import (
 	"github.com/hyperledger/fabric/common/ledger/testutil"
 	"github.com/hyperledger/fabric/core/ledger"
 	"github.com/hyperledger/fabric/core/ledger/kvledger/txmgmt/version"
+	ledgertestutil "github.com/hyperledger/fabric/core/ledger/testutil"
 )
 
+func TestMain(m *testing.M) {
+	ledgertestutil.SetupCoreYAMLConfig("./../../../../../../peer")
+}
+
 func TestTxSimulatorWithNoExistingData(t *testing.T) {
 	// run the tests for each environment configured in pkg_test.go
 	for _, testEnv := range testEnvs {
@@ -390,7 +395,6 @@ func testIteratorWithDeletes(t *testing.T, env testEnv) {
 	defer itr.Close()
 	kv, _ := itr.Next()
 	testutil.AssertEquals(t, kv.(*ledger.KV).Key, createTestKey(3))
-
 	kv, _ = itr.Next()
 	testutil.AssertEquals(t, kv.(*ledger.KV).Key, createTestKey(5))
 }

core/ledger/ledgerconfig/ledger_config.go

@@ -91,7 +91,12 @@ func GetCouchDBDefinition() *CouchDBDef {
 
 //GetQueryLimit exposes the queryLimit variable
 func GetQueryLimit() int {
-	return viper.GetInt("ledger.state.queryLimit")
+	queryLimit := viper.GetInt("ledger.state.queryLimit")
+	// if queryLimit was unset, default to 10000
+	if queryLimit == 0 {
+		queryLimit = 10000
+	}
+	return queryLimit
 }
 
 //IsHistoryDBEnabled exposes the historyDatabase variable