image_test.go

package main

import (
	"io/ioutil"
	"testing"
)

func TestImageResize(t *testing.T) {
	opts := ImageOptions{Width: 300, Height: 300}
	buf, _ := ioutil.ReadAll(readFile("imaginary.jpg"))

	img, err := Resize(buf, opts)
	if err != nil {
		t.Errorf("Cannot process image: %s", err)
	}
	if img.Mime != "image/jpeg" {
		t.Error("Invalid image MIME type")
	}
	if assertSize(img.Body, opts.Width, opts.Height) != nil {
		t.Errorf("Invalid image size, expected: %dx%d", opts.Width, opts.Height)
	}
}

func TestImageFit(t *testing.T) {
	opts := ImageOptions{Width: 300, Height: 300}
	buf, _ := ioutil.ReadAll(readFile("imaginary.jpg"))

	img, err := Fit(buf, opts)
	if err != nil {
		t.Errorf("Cannot process image: %s", err)
	}
	if img.Mime != "image/jpeg" {
		t.Error("Invalid image MIME type")
	}
	// 550x740 -> 222x300
	if assertSize(img.Body, 222, 300) != nil {
		t.Errorf("Invalid image size, expected: %dx%d", opts.Width, opts.Height)
	}
}

func TestImagePipelineOperations(t *testing.T) {
	width, height := 300, 260

	operations := PipelineOperations{
		PipelineOperation{
			Name: "crop",
			Params: map[string]interface{}{
				"width":  width,
				"height": height,
			},
		},
		PipelineOperation{
			Name: "convert",
			Params: map[string]interface{}{
				"type": "webp",
			},
		},
	}

	opts := ImageOptions{Operations: operations}
	buf, _ := ioutil.ReadAll(readFile("imaginary.jpg"))

	img, err := Pipeline(buf, opts)
	if err != nil {
		t.Errorf("Cannot process image: %s", err)
	}
	if img.Mime != "image/webp" {
		t.Error("Invalid image MIME type")
	}
	if assertSize(img.Body, width, height) != nil {
		t.Errorf("Invalid image size, expected: %dx%d", width, height)
	}
}