FAB-1758 Fix CouchDB tests when run in parallel

When various packages that utilize CouchDB were tested
all together, we received intermitent test failures
due to collisions in test envionment.  Fixed by scoping
each test package to different CouchDB databases (chains).

Change-Id: I93b9043f7a5a60b1052d74e9f5f877f9e19a29d9
Signed-off-by: denyeart <enyeart@us.ibm.com>

Author: denyeart

core/ledger/kvledger/txmgmt/statedb/statecouchdb/statecouchdb_test.go

@@ -41,7 +41,8 @@ func TestBasicRW(t *testing.T) {
 	if ledgerconfig.IsCouchDBEnabled() == true {
 
 		env := NewTestVDBEnv(t)
-		defer env.Cleanup()
+		env.Cleanup("TestDB")
+		defer env.Cleanup("TestDB")
 		commontests.TestBasicRW(t, env.DBProvider)
 
 	}
@@ -51,7 +52,10 @@ func TestMultiDBBasicRW(t *testing.T) {
 	if ledgerconfig.IsCouchDBEnabled() == true {
 
 		env := NewTestVDBEnv(t)
-		defer env.Cleanup()
+		env.Cleanup("TestDB1")
+		env.Cleanup("TestDB2")
+		defer env.Cleanup("TestDB1")
+		defer env.Cleanup("TestDB2")
 		commontests.TestMultiDBBasicRW(t, env.DBProvider)
 
 	}
@@ -60,7 +64,8 @@ func TestMultiDBBasicRW(t *testing.T) {
 /* TODO add delete support in couchdb and then convert key value of nil to a couch delete. This will resolve TestDeletes
 func TestDeletes(t *testing.T) {
 	env := NewTestVDBEnv(t)
-	defer env.Cleanup()
+	env.Cleanup("TestDB")
+	defer env.Cleanup("TestDB")
 	commontests.TestDeletes(t, env.DBProvider)
 }
 */
@@ -69,7 +74,8 @@ func TestIterator(t *testing.T) {
 	if ledgerconfig.IsCouchDBEnabled() == true {
 
 		env := NewTestVDBEnv(t)
-		defer env.Cleanup()
+		env.Cleanup("TestDB")
+		defer env.Cleanup("TestDB")
 		commontests.TestIterator(t, env.DBProvider)
 
 	}
@@ -113,7 +119,8 @@ func TestQuery(t *testing.T) {
 	if ledgerconfig.IsCouchDBEnabled() == true {
 
 		env := NewTestVDBEnv(t)
-		defer env.Cleanup()
+		env.Cleanup("TestDB")
+		defer env.Cleanup("TestDB")
 		commontests.TestQuery(t, env.DBProvider)
 
 	}

core/ledger/kvledger/txmgmt/statedb/statecouchdb/statecouchdb_test_export.go

@@ -17,6 +17,7 @@ limitations under the License.
 package statecouchdb
 
 import (
+	"strings"
 	"testing"
 
 	"github.com/hyperledger/fabric/core/ledger/kvledger/txmgmt/statedb"
@@ -29,28 +30,26 @@ var badConnectURL = "localhost:5990"
 var username = ""
 var password = ""
 
-// TestVDBEnv provides a level db backed versioned db for testing
+// TestVDBEnv provides a couch db backed versioned db for testing
 type TestVDBEnv struct {
 	t          testing.TB
 	DBProvider statedb.VersionedDBProvider
 }
 
-// NewTestVDBEnv instantiates and new level db backed TestVDB
+// NewTestVDBEnv instantiates and new couch db backed TestVDB
 func NewTestVDBEnv(t testing.TB) *TestVDBEnv {
 	t.Logf("Creating new TestVDBEnv")
 
 	dbProvider, _ := NewVersionedDBProvider()
 	testVDBEnv := &TestVDBEnv{t, dbProvider}
-	testVDBEnv.Cleanup()
+	// No cleanup for new test environment.  Need to cleanup per test for each DB used in the test.
 	return testVDBEnv
 }
 
 // Cleanup drops the test couch databases and closes the db provider
-func (env *TestVDBEnv) Cleanup() {
+func (env *TestVDBEnv) Cleanup(dbName string) {
 	env.t.Logf("Cleaningup TestVDBEnv")
-	cleanupDB("testdb")
-	cleanupDB("testdb1")
-	cleanupDB("testdb2")
+	cleanupDB(strings.ToLower(dbName))
 	env.DBProvider.Close()
 
 }

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

@@ -55,6 +55,8 @@ func init() {
 
 }
 
+///////////// LevelDB Environment //////////////
+
 type levelDBLockBasedEnv struct {
 	testDBEnv *stateleveldb.TestVDBEnv
 	testDB    statedb.VersionedDB
@@ -90,6 +92,10 @@ func (env *levelDBLockBasedEnv) cleanup() {
 	defer env.testDBEnv.Cleanup()
 }
 
+///////////// CouchDB Environment //////////////
+
+var couchTestChainID = "TxmgrTestDB"
+
 type couchDBLockBasedEnv struct {
 	testDBEnv *statecouchdb.TestVDBEnv
 	testDB    statedb.VersionedDB
@@ -104,7 +110,7 @@ func (env *couchDBLockBasedEnv) init(t *testing.T) {
 	viper.Set("peer.fileSystemPath", "/tmp/fabric/ledgertests")
 	viper.Set("ledger.state.couchDBConfig.couchDBAddress", "127.0.0.1:5984")
 	testDBEnv := statecouchdb.NewTestVDBEnv(t)
-	testDB, err := testDBEnv.DBProvider.GetDBHandle("TestDB")
+	testDB, err := testDBEnv.DBProvider.GetDBHandle(couchTestChainID)
 	testutil.AssertNoError(t, err, "")
 
 	txMgr := lockbasedtxmgr.NewLockBasedTxMgr(testDB)
@@ -123,9 +129,11 @@ func (env *couchDBLockBasedEnv) getVDB() statedb.VersionedDB {
 
 func (env *couchDBLockBasedEnv) cleanup() {
 	defer env.txmgr.Shutdown()
-	defer env.testDBEnv.Cleanup()
+	defer env.testDBEnv.Cleanup(couchTestChainID)
 }
 
+//////////// txMgrTestHelper /////////////
+
 type txMgrTestHelper struct {
 	t     *testing.T
 	txMgr txmgr.TxMgr

core/ledger/util/couchdb/couchdb_test.go

@@ -28,7 +28,7 @@ import (
 //Basic setup to test couch
 var connectURL = "localhost:5984"
 var badConnectURL = "localhost:5990"
-var database = "testdb1"
+var database = "couch_util_testdb"
 var username = ""
 var password = ""