added first unit test

.gitignore

@@ -27,7 +27,7 @@ _testmain.go
 .idea/
 *.log
 
-test/
+testImages/
 
 devconfig.ini
 /main

internal/pkg/localFileStructure/checksumCalculator_test.go

@@ -0,0 +1,38 @@
+package localFileStructure
+
+import (
+	"github.com/sirupsen/logrus"
+	"github.com/sirupsen/logrus/hooks/test"
+	"testing"
+)
+
+func TestCalculateFileCheckSumsWithValidFile(t *testing.T) {
+	expectedSum := "2e7c66bd6657b1a8659ba05af26a0f7e"
+
+	sum, err := calculateFileCheckSums("../../../test/md5testfile.txt")
+	if err != nil {
+		t.Error(err)
+	}
+
+	if sum != expectedSum {
+		t.Errorf("wrong md5 sum provided: expected %s - got %s", expectedSum, sum)
+	}
+}
+
+func TestCalculateFileCheckSumsWithWrongPath(t *testing.T) {
+	hook := test.NewGlobal()
+	hook.Reset()
+
+	sum, err := calculateFileCheckSums("unknownPath")
+	if err == nil {
+		t.Error("there was no error using an invalid and unknown path.")
+	}
+
+	if sum != "" {
+		t.Error("found a checksum of an invalid file. This should not happen!")
+	}
+
+	if hook.LastEntry().Level != logrus.ErrorLevel {
+		t.Errorf("the error was not logged")
+	}
+}

test/md5testfile.txt

@@ -0,0 +1 @@
+This is a md5sum testfile to check the md5 wrapping code