Increase test coverage of Ledgernext utils

Change-Id: I231e3ceaafa0ee2d25d022f0ca217796cc6391b3
Signed-off-by: Mari Wade <mariwade@us.ibm.com>

core/ledgernext/util/ioutil_test.go

@@ -0,0 +1,107 @@
+/*
+Copyright IBM Corp. 2016 All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+		 http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/hyperledger/fabric/core/ledgernext/testutil"
+)
+
+var DbPathTest = "/tmp/v2/test/util"
+var DbFileTest = DbPathTest + "/testUtilFileDat1"
+
+func TestCreatingDBDirWithPathSeperator(t *testing.T) {
+
+	//test creating a directory with path separator passed
+	DbPathTestWSeparator := DbPathTest + "/"
+	cleanup(DbPathTestWSeparator) //invoked prior to test to make sure test is executed in desired environment
+	defer cleanup(DbPathTestWSeparator)
+
+	dirEmpty, err := CreateDirIfMissing(DbPathTestWSeparator)
+	testutil.AssertNoError(t, err, fmt.Sprintf("Error when trying to create a test db directory at [%s]", DbPathTestWSeparator))
+	testutil.AssertEquals(t, dirEmpty, true) //test directory is empty is returning true
+}
+
+func TestCreatingDBDirWhenDirDoesAndDoesNotExists(t *testing.T) {
+
+	cleanup(DbPathTest) //invoked prior to test to make sure test is executed in desired environment
+	defer cleanup(DbPathTest)
+
+	//test creating a directory without path separator passed
+	dirEmpty, err := CreateDirIfMissing(DbPathTest)
+	testutil.AssertNoError(t, err, fmt.Sprintf("Error when trying to create a test db directory at [%s]", DbPathTest))
+	testutil.AssertEquals(t, dirEmpty, true)
+
+	//test creating directory AGAIN, that is the directory already exists
+	dirEmpty2, err2 := CreateDirIfMissing(DbPathTest)
+	testutil.AssertNoError(t, err2, fmt.Sprintf("Error not handling existing directory when trying to create a test db directory at [%s]", DbPathTest))
+	testutil.AssertEquals(t, dirEmpty2, true)
+
+}
+
+func TestDirNotEmptyAndFileExists(t *testing.T) {
+
+	cleanup(DbPathTest)
+	defer cleanup(DbPathTest)
+
+	//create the directory
+	dirEmpty, err := CreateDirIfMissing(DbPathTest)
+	testutil.AssertNoError(t, err, fmt.Sprintf("Error when trying to create a test db directory at [%s]", DbPathTest))
+	testutil.AssertEquals(t, dirEmpty, true)
+
+	//test file does not exists and size is returned correctly
+	exists2, size2, err2 := FileExists(DbFileTest)
+	testutil.AssertNoError(t, err2, fmt.Sprintf("Error when trying to determine if file exist when it does not at [%s]", DbFileTest))
+	testutil.AssertEquals(t, size2, int64(0))
+	testutil.AssertEquals(t, exists2, false) //test file that does not exists reports false
+
+	//create file
+	testStr := "This is some test data in a file"
+	sizeOfFileCreated, err3 := createAndWriteAFile(testStr)
+	testutil.AssertNoError(t, err3, fmt.Sprintf("Error when trying to create and write to file at [%s]", DbFileTest))
+	testutil.AssertEquals(t, sizeOfFileCreated, len(testStr)) //test file size returned is correct
+
+	//test that the file exists and size is returned correctly
+	exists, size, err4 := FileExists(DbFileTest)
+	testutil.AssertNoError(t, err4, fmt.Sprintf("Error when trying to determine if file exist at [%s]", DbFileTest))
+	testutil.AssertEquals(t, size, int64(sizeOfFileCreated))
+	testutil.AssertEquals(t, exists, true) //test file that does exists reports true
+
+	//test that if the directory is not empty
+	dirEmpty5, err5 := DirEmpty(DbPathTest)
+	testutil.AssertNoError(t, err5, fmt.Sprintf("Error when detecting if empty at db directory [%s]", DbPathTest))
+	testutil.AssertEquals(t, dirEmpty5, false) //test directory is empty is returning false
+}
+
+func createAndWriteAFile(sentence string) (int, error) {
+	//create a file in the direcotry
+	f, err2 := os.Create(DbFileTest)
+	if err2 != nil {
+		return 0, err2
+	}
+	defer f.Close()
+
+	//write to the file
+	return f.WriteString(sentence)
+}
+
+func cleanup(path string) {
+	os.RemoveAll(path)
+}