github.com/shohhei1126/hugo@v0.42.2-0.20180623210752-3d5928889ad7/tpl/images/images_test.go (about)

     1  // Copyright 2017 The Hugo Authors. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  // http://www.apache.org/licenses/LICENSE-2.0
     7  //
     8  // Unless required by applicable law or agreed to in writing, software
     9  // distributed under the License is distributed on an "AS IS" BASIS,
    10  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package images
    15  
    16  import (
    17  	"bytes"
    18  	"fmt"
    19  	"image"
    20  	"image/color"
    21  	"image/png"
    22  	"path/filepath"
    23  	"testing"
    24  
    25  	"github.com/gohugoio/hugo/deps"
    26  	"github.com/gohugoio/hugo/hugofs"
    27  	"github.com/spf13/afero"
    28  	"github.com/spf13/cast"
    29  	"github.com/spf13/viper"
    30  	"github.com/stretchr/testify/assert"
    31  	"github.com/stretchr/testify/require"
    32  )
    33  
    34  type tstNoStringer struct{}
    35  
    36  var configTests = []struct {
    37  	path   interface{}
    38  	input  []byte
    39  	expect interface{}
    40  }{
    41  	{
    42  		path:  "a.png",
    43  		input: blankImage(10, 10),
    44  		expect: image.Config{
    45  			Width:      10,
    46  			Height:     10,
    47  			ColorModel: color.NRGBAModel,
    48  		},
    49  	},
    50  	{
    51  		path:  "a.png",
    52  		input: blankImage(10, 10),
    53  		expect: image.Config{
    54  			Width:      10,
    55  			Height:     10,
    56  			ColorModel: color.NRGBAModel,
    57  		},
    58  	},
    59  	{
    60  		path:  "b.png",
    61  		input: blankImage(20, 15),
    62  		expect: image.Config{
    63  			Width:      20,
    64  			Height:     15,
    65  			ColorModel: color.NRGBAModel,
    66  		},
    67  	},
    68  	{
    69  		path:  "a.png",
    70  		input: blankImage(20, 15),
    71  		expect: image.Config{
    72  			Width:      10,
    73  			Height:     10,
    74  			ColorModel: color.NRGBAModel,
    75  		},
    76  	},
    77  	// errors
    78  	{path: tstNoStringer{}, expect: false},
    79  	{path: "non-existent.png", expect: false},
    80  	{path: "", expect: false},
    81  }
    82  
    83  func TestNSConfig(t *testing.T) {
    84  	t.Parallel()
    85  
    86  	v := viper.New()
    87  	v.Set("workingDir", "/a/b")
    88  
    89  	ns := New(&deps.Deps{Fs: hugofs.NewMem(v)})
    90  
    91  	for i, test := range configTests {
    92  		errMsg := fmt.Sprintf("[%d] %s", i, test.path)
    93  
    94  		// check for expected errors early to avoid writing files
    95  		if b, ok := test.expect.(bool); ok && !b {
    96  			_, err := ns.Config(interface{}(test.path))
    97  			require.Error(t, err, errMsg)
    98  			continue
    99  		}
   100  
   101  		// cast path to string for afero.WriteFile
   102  		sp, err := cast.ToStringE(test.path)
   103  		require.NoError(t, err, errMsg)
   104  		afero.WriteFile(ns.deps.Fs.Source, filepath.Join(v.GetString("workingDir"), sp), test.input, 0755)
   105  
   106  		result, err := ns.Config(test.path)
   107  
   108  		require.NoError(t, err, errMsg)
   109  		assert.Equal(t, test.expect, result, errMsg)
   110  		assert.NotEqual(t, 0, len(ns.cache), errMsg)
   111  	}
   112  }
   113  
   114  func blankImage(width, height int) []byte {
   115  	var buf bytes.Buffer
   116  	img := image.NewRGBA(image.Rect(0, 0, width, height))
   117  	if err := png.Encode(&buf, img); err != nil {
   118  		panic(err)
   119  	}
   120  	return buf.Bytes()
   121  }