/
loader.spec.js
325 lines (287 loc) · 11.9 KB
/
loader.spec.js
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const fs = require('fs')
const path = require('path')
const webpack = require('webpack')
describe('svg-url-loader', function() {
const svgUrlLoader = path.resolve(__dirname, '../src/loader.js')
const outputDir = path.resolve(__dirname, './output'),
bundleFileName = 'bundle.js',
getBundleFile = function() {
return path.join(outputDir, bundleFileName)
}
const context = path.resolve(__dirname, '../')
const getBaseWebpackConfig = () => ({
context,
mode: 'development',
output: {
path: outputDir,
filename: bundleFileName
},
module: {
rules: [
{
test: /\.svg/,
exclude: /node_modules/,
use: [
{
loader: svgUrlLoader,
options: {}
}
]
}
]
}
})
// Clean generated cache files before each test so that we can call each test with an empty state.
afterEach(function(done) {
fs.unlink(getBundleFile(), done)
})
describe('"stripdeclarations" option', function () {
it('if turned off - should do nothing to an SVG that has an XML declaration', function(done) {
const config = {
...getBaseWebpackConfig(),
entry: './test/input/icon-with-declaration.js'
}
config.module.rules[0].use[0].options.stripdeclarations = false
webpack(config, function(err) {
expect(err).toBeNull()
fs.readFile(getBundleFile(), function(err, data) {
expect(err).toBeNull()
const encoded = eval(data.toString())
expect(encoded.indexOf("%3C?xml version='1.0' encoding='UTF-8'?%3E")).toBeGreaterThan(-1)
return done()
})
})
})
it('if turned on - should do nothing to an SVG that doesn\'t have an XML declaration', function(done) {
const config = {
...getBaseWebpackConfig(),
entry: './test/input/icon.js'
}
config.module.rules[0].use[0].options.stripdeclarations = true
webpack(config, function(err) {
expect(err).toBeNull()
fs.readFile(getBundleFile(), function(err, data) {
expect(err).toBeNull()
const encoded = eval(data.toString())
expect(encoded.indexOf('data:image/svg+xml,%3Csvg')).toBe(0)
return done()
})
})
})
it('if turned on - should remove XML declaration from a file that has one', function(done) {
const config = {
...getBaseWebpackConfig(),
entry: './test/input/icon-with-declaration.js'
}
config.module.rules[0].use[0].options.stripdeclarations = true
webpack(config, function(err) {
expect(err).toBeNull()
fs.readFile(getBundleFile(), function(err, data) {
expect(err).toBeNull()
const encoded = eval(data.toString())
expect(encoded.indexOf('%3C?xml version="1.0" encoding="UTF-8"?%3E')).toBe(-1)
expect(encoded.indexOf('data:image/svg+xml,%3Csvg')).toBe(0)
return done()
})
})
})
})
describe('"limit" option and "url.dataUrlLimit" configuration', function () {
it('should fall back to file-loader if the content of SVG file is longer than "limit" query parameter', function(done) {
const config = {
...getBaseWebpackConfig(),
entry: './test/input/icon.js'
}
config.module.rules[0].use[0].options.limit = 10
config.module.rules[0].use[0].options.name = 'foo.svg'
webpack(config, function(err) {
expect(err).toBeNull()
fs.readFile(getBundleFile(), function(err, data) {
expect(err).toBeNull()
const encoded = eval(data.toString())
expect(encoded).toBe('foo.svg')
return done()
})
})
})
})
describe('combining with other loaders', function () {
it('should convert SVG file to utf-8 encoded data-uri string, when embedded in LESS file', function(done) {
const config = {
...getBaseWebpackConfig(),
entry: './test/input/less.js'
}
config.module.rules.push({
test: /\.less$/,
use: [
'css-loader',
'less-loader'
]
})
webpack(config, function(err) {
expect(err).toBeNull()
fs.readFile(getBundleFile(), function(err, data) {
expect(err).toBeNull()
const encoded = eval(data.toString())
let found = false
for(let i=0; i<encoded[0].length; ++i) {
const v = encoded[0][i]
if (typeof v === 'string' && v.indexOf('background-image: url("data:image/svg+xml,%3Csvg') !== -1) {
found = true
}
}
expect(found).toBe(true)
return done()
})
})
})
it('should convert SVG file to utf-8 encoded data-uri string, when embedded in SCSS file', function(done) {
const config = {
...getBaseWebpackConfig(),
entry: './test/input/scss.js'
}
config.module.rules.push({
test: /\.scss$/,
use: [
'css-loader',
'sass-loader'
]
})
webpack(config, function(err) {
expect(err).toBeNull()
fs.readFile(getBundleFile(), function(err, data) {
expect(err).toBeNull()
const encoded = eval(data.toString())
let found = false
for(let i=0; i<encoded[0].length; ++i) {
const v = encoded[0][i]
if (typeof v === 'string' && v.indexOf('background-image: url("data:image/svg+xml,%3Csvg') !== -1) {
found = true
}
}
expect(found).toBe(true)
return done()
})
})
})
it('should convert SVG file to utf-8 encoded data-uri string, when embedded in CSS file', function(done) {
const config = {
...getBaseWebpackConfig(),
entry: './test/input/css.js'
}
config.module.rules.push({
test: /\.css$/,
use: [
'css-loader'
]
})
webpack(config, function(err) {
expect(err).toBeNull()
fs.readFile(getBundleFile(), function(err, data) {
expect(err).toBeNull()
const encoded = eval(data.toString())
let found = false
for(let i=0; i<encoded[0].length; ++i) {
const v = encoded[0][i]
if (typeof v === 'string' && v.indexOf('background-image: url("data:image/svg+xml,%3Csvg') !== -1) {
found = true
}
}
expect(found).toBe(true)
return done()
})
})
})
})
describe('"iesafe" option skips styled files encoded to more than 4kB', function () {
it('should encode file below limit', function(done) {
const config = {
...getBaseWebpackConfig(),
entry: './test/input/4047B-encoded-styled.js'
}
config.module.rules[0].use[0].options.iesafe = true
webpack(config, function(err) {
expect(err).toBeNull()
fs.readFile(getBundleFile(), function(err, data) {
expect(err).toBeNull()
const encoded = eval(data.toString())
expect(encoded.indexOf('data:image/svg+xml,%3Csvg')).toBe(0)
expect(encoded.length).toBeLessThan(4096)
return done()
})
})
})
it('should encode file above limit without style-element', function(done) {
const config = {
...getBaseWebpackConfig(),
entry: './test/input/4104B-encoded-unstyled.js'
}
config.module.rules[0].use[0].options.iesafe = true
webpack(config, function(err) {
expect(err).toBeNull()
fs.readFile(getBundleFile(), function(err, data) {
expect(err).toBeNull()
const encoded = eval(data.toString())
expect(encoded.indexOf('data:image/svg+xml,%3Csvg')).toBe(0)
expect(encoded.length).toBeGreaterThan(4096)
return done()
})
})
})
it('should fall back on file above limit with style-element', function(done) {
const config = {
...getBaseWebpackConfig(),
entry: './test/input/4099B-encoded-styled.js'
}
config.module.rules[0].use[0].options.iesafe = true
config.module.rules[0].use[0].options.name = 'foo.svg'
webpack(config, function(err) {
expect(err).toBeNull()
fs.readFile(getBundleFile(), function(err, data) {
expect(err).toBeNull()
const encoded = eval(data.toString())
expect(encoded).toBe('foo.svg')
return done()
})
})
})
it('should fall back on file above limit with style-element even when base64 encoding', function(done) {
const config = {
...getBaseWebpackConfig(),
entry: './test/input/4099B-encoded-styled.js'
}
config.module.rules[0].use[0].options.iesafe = true
config.module.rules[0].use[0].options.name = 'foo.svg'
config.module.rules[0].use[0].options.encoding = "base64"
webpack(config, function(err) {
expect(err).toBeNull()
fs.readFile(getBundleFile(), function(err, data) {
expect(err).toBeNull()
const encoded = eval(data.toString())
expect(encoded).toBe('foo.svg')
return done()
})
})
})
})
describe("encoding is base64", function() {
it('should convert SVG file to base64 encoded data-uri string', function(done) {
const config = {
...getBaseWebpackConfig(),
entry: './test/input/icon.js'
}
config.module.rules[0].use[0].options.encoding = "base64"
webpack(config, function(err) {
expect(err).toBeNull()
fs.readFile(getBundleFile(), function(err, data) {
expect(err).toBeNull()
const encoded = eval(data.toString())
expect(encoded.indexOf('"')).toBe(-1)
expect(encoded.lastIndexOf('"')).toBe(-1)
expect(encoded.indexOf('data:image/svg+xml;base64')).toBe(0)
return done()
})
})
})
})
})