added tests for the filescanner using a testimage

internal/pkg/localFileStructure/ScanLocalFileStructure_test.go

@@ -0,0 +1,22 @@
+package localFileStructure
+
+import "testing"
+
+func Test_ScanLocalFileStructure_should_find_testfile(t *testing.T) {
+
+	images, err := ScanLocalFileStructure("../../../test/")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if len(images) != 1 {
+		t.Error("Did not find expected testfiles. Expected at least one!")
+	}
+
+	for _, img := range images {
+		if img.Name != "testimage.jpg" {
+			t.Errorf("Did not find the expected testimage.")
+		}
+	}
+
+}