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[test] Add missing styles tests #15376

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merged 1 commit into from
Apr 17, 2019
Merged

[test] Add missing styles tests #15376

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305 changes: 251 additions & 54 deletions packages/material-ui-styles/src/createGenerateClassName/createGenerateClassName.test.js
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Original file line number Diff line number Diff line change
@@ -1,66 +1,263 @@
import warning from 'warning';
import hash from '@emotion/hash';
import { assert } from 'chai';
import consoleErrorMock from 'test/utils/consoleErrorMock';
import createGenerateClassName from './createGenerateClassName';

function safePrefix(classNamePrefix) {
const prefix = String(classNamePrefix);
warning(prefix.length < 256, `Material-UI: the class name prefix is too long: ${prefix}.`);
return prefix;
}
describe('createGenerateClassName', () => {
const generateClassName = createGenerateClassName();
const generateClassNameGlobal = createGenerateClassName({ dangerouslyUseGlobalCSS: true });

const themeHashCache = {};
describe('dangerouslyUseGlobalCSS', () => {
it('should have a stable classname', () => {
assert.strictEqual(
generateClassNameGlobal(
{
key: 'key',
},
{
options: {
name: 'MuiGrid',
},
},
),
'MuiGrid-key',
);
assert.strictEqual(
generateClassNameGlobal(
{
key: 'key',
},
{
rules: {
raw: {
key: () => ({}),
},
},
options: {
link: true,
classNamePrefix: 'classNamePrefix',
},
},
),
'classNamePrefix-key-1',
);
});
});

// Returns a function which generates unique class names based on counters.
// When new generator function is created, rule counter is reset.
// We need to reset the rule counter for SSR for each request.
//
// It's inspired by
// https://github.com/cssinjs/jss/blob/4e6a05dd3f7b6572fdd3ab216861d9e446c20331/src/utils/createGenerateClassName.js
export default function createGenerateClassName(options = {}) {
const { dangerouslyUseGlobalCSS = false, productionPrefix = 'jss', seed = '' } = options;
let ruleCounter = 0;
it('should generate a class name', () => {
assert.strictEqual(
generateClassName(
{
key: 'key',
},
{
rules: {
raw: {
key: {
flex: 1,
},
},
},
options: {
theme: {},
classNamePrefix: 'classNamePrefix',
},
},
),
'classNamePrefix-key-1',
);
});

return (rule, styleSheet) => {
const isStatic = !styleSheet.options.link;
it('should increase the counter only when needed', () => {
assert.strictEqual(
generateClassName(
{
key: 'key',
},
{
rules: {
raw: {
key: {
flex: 1,
},
},
},
options: {
theme: {},
classNamePrefix: 'classNamePrefix',
},
},
),
'classNamePrefix-key-2',
);
assert.strictEqual(
generateClassName(
{
key: 'key',
},
{
rules: {
raw: {
key: () => ({}),
},
},
options: {
link: true,
classNamePrefix: 'classNamePrefix',
},
},
),
'classNamePrefix-key-3',
);
assert.strictEqual(
generateClassName(
{
key: 'key',
},
{
rules: {
raw: {
key: () => ({}),
},
},
options: {
link: true,
classNamePrefix: 'classNamePrefix',
},
},
),
'classNamePrefix-key-4',
);
});

if (dangerouslyUseGlobalCSS && styleSheet && styleSheet.options.name && isStatic) {
return `${safePrefix(styleSheet.options.name)}-${rule.key}`;
}
it('should use the theme object, rule key and the style raw', () => {
assert.strictEqual(
generateClassName(
{
key: 'key1',
},
{
rules: {
raw: {
key1: {
flex: 1,
},
},
},
options: {
theme: {},
classNamePrefix: 'classNamePrefix',
},
},
),
'classNamePrefix-key1-5',
);
assert.strictEqual(
generateClassName(
{
key: 'key2',
},
{
rules: {
raw: {
key2: {
flex: 1,
},
},
},
options: {
theme: {},
classNamePrefix: 'classNamePrefix',
},
},
),
'classNamePrefix-key2-6',
);
assert.strictEqual(
generateClassName(
{
key: 'key2',
},
{
rules: {
raw: {
key2: {
flex: 2,
},
},
},
options: {
theme: {},
classNamePrefix: 'classNamePrefix',
},
},
),
'classNamePrefix-key2-7',
);
assert.strictEqual(
generateClassName(
{
key: 'key2',
},
{
rules: {
raw: {
key2: {
flex: 2,
},
},
},
options: {
theme: {
spacing: 4,
},
classNamePrefix: 'classNamePrefix',
},
},
),
'classNamePrefix-key2-8',
);
});

let suffix;
describe('classNamePrefix', () => {
it('should work without a classNamePrefix', () => {
const rule = { key: 'root' };
const styleSheet = {
rules: { raw: {} },
options: {},
};
const generateClassName2 = createGenerateClassName();
assert.strictEqual(generateClassName2(rule, styleSheet), 'root-1');
});
});

// It's a static rule.
if (isStatic) {
let themeHash = themeHashCache[styleSheet.options.theme];
if (!themeHash) {
themeHash = hash(JSON.stringify(styleSheet.options.theme));
themeHashCache[styleSheet.theme] = themeHash;
}
const raw = styleSheet.rules.raw[rule.key];
suffix = hash(`${themeHash}${rule.key}${JSON.stringify(raw)}`);
describe('production', () => {
// Only run the test on node.
if (!/jsdom/.test(window.navigator.userAgent)) {
return;
}

if (!suffix) {
ruleCounter += 1;
warning(
ruleCounter < 1e10,
[
'Material-UI: you might have a memory leak.',
'The ruleCounter is not supposed to grow that much.',
].join(''),
);

suffix = ruleCounter;
}
let nodeEnv;
const env = process.env;

if (process.env.NODE_ENV === 'production') {
return `${productionPrefix}${seed}${suffix}`;
}
before(() => {
nodeEnv = env.NODE_ENV;
env.NODE_ENV = 'production';
consoleErrorMock.spy();
});

// Help with debuggability.
if (styleSheet.options.classNamePrefix) {
return `${safePrefix(styleSheet.options.classNamePrefix)}-${rule.key}-${seed}${suffix}`;
}
after(() => {
env.NODE_ENV = nodeEnv;
consoleErrorMock.reset();
});

return `${rule.key}-${seed}${suffix}`;
};
}
it('should output a short representation', () => {
const rule = { key: 'root' };
const styleSheet = {
rules: { raw: {} },
options: {},
};
const generateClassName2 = createGenerateClassName();
assert.strictEqual(generateClassName2(rule, styleSheet), 'jss1');
});
});
});
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