testCases := []struct {
		fault            Fault
		partNumberMarker string
		maxParts         string
		expectedErr      APIError
	}{
		// Test case - 1.
		// case where a signature mismatch is introduced and the response is validated.
		{
			fault:            BadSignature,
			partNumberMarker: "",
			maxParts:         "",
			expectedErr:      signatureMismatchErr,
		},

		OA.ObjectParts = new(objectAttributesParts)
		OA.ObjectParts.PartNumberMarker = opts.PartNumberMarker

		OA.ObjectParts.MaxParts = opts.MaxParts
		partsLength := len(objInfo.Parts)
		OA.ObjectParts.PartsCount = partsLength

		if opts.MaxParts > -1 {
			for i, v := range objInfo.Parts {
				if v.Number <= opts.PartNumberMarker {
					continue
				}

				if len(OA.ObjectParts.Parts) == opts.MaxParts {