image_test.go

// Copyright 2018 terf Authors. All rights reserved.
//
// This file is part of terf.
//
// terf is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// terf is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with terf.  If not, see <http://www.gnu.org/licenses/>.

package terf

import (
	"bytes"
	"encoding/base64"
	"io"
	"testing"
)

func TestRoundTrip(t *testing.T) {
	filename := "test.jpg"
	id := 1234
	label := "Crystal"
	labelID := 1
	labelRaw := 2
	sourceID := 104
	width := 150
	height := 103

	raw, _ := base64.StdEncoding.DecodeString(data)

	output := new(bytes.Buffer)
	w := NewWriter(output)
	im, err := NewImage(bytes.NewReader(raw), id, labelID, labelRaw, label, filename, sourceID)
	if err != nil {
		t.Fatal(err)
	}

	if width != im.Width {
		t.Errorf("Incorrect width: got %d should be %d", im.Width, width)
	}
	if height != im.Height {
		t.Errorf("Incorrect height: got %d should be %d", im.Height, height)
	}

	example, err := im.MarshalExample()
	if err != nil {
		t.Fatal(err)
	}

	w.Write(example)
	w.Flush()

	if err := w.Error(); err != nil {
		t.Fatal(err)
	}

	origRaw := ExampleFeatureBytes(example, "image/encoded")

	r := NewReader(bytes.NewReader(output.Bytes()))
	for {
		ex, err := r.Next()
		if err == io.EOF {
			break
		} else if err != nil {
			t.Fatal(err)
		}

		img := &Image{}
		err = img.UnmarshalExample(ex)
		if err != nil {
			t.Fatal(err)
		}

		if id != img.ID {
			t.Errorf("Incorrect id: got %d should be %d", img.ID, id)
		}
		if filename != img.Filename {
			t.Errorf("Incorrect filename: got %s should be %s", img.Filename, filename)
		}
		if label != img.LabelText {
			t.Errorf("Incorrect label: got %s should be %s", img.LabelText, label)
		}
		if labelID != img.LabelID {
			t.Errorf("Incorrect id: got %d should be %d", img.LabelID, labelID)
		}
		if labelRaw != img.LabelRaw {
			t.Errorf("Incorrect labelRaw: got %d should be %d", img.LabelRaw, labelRaw)
		}
		if sourceID != img.SourceID {
			t.Errorf("Incorrect source: got %d should be %d", img.SourceID, sourceID)
		}
		if width != img.Width {
			t.Errorf("Incorrect width: got %d should be %d", img.Width, width)
		}
		if height != img.Height {
			t.Errorf("Incorrect height: got %d should be %d", img.Height, height)
		}

		rawData := ExampleFeatureBytes(ex, "image/encoded")
		if bytes.Compare(origRaw, rawData) != 0 {
			t.Errorf("Incorrect image data")
		}
	}
}

const data = `
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