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jest-setup.js
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jest-setup.js
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"use strict";
const _ = require("lodash");
const basicChecks = require("./lib/testUtils/basicChecks");
const less = require("postcss-less");
const stylelint = require("./lib/standalone");
jest.mock("./lib/utils/getOsEol", () => () => "\n");
global.testRule = (rule, schema) => {
expect.extend({
toHaveMessage(testCase) {
if (testCase.message === undefined) {
return {
message: () =>
'Expected "reject" test case to have a "message" property',
pass: false
};
}
return {
pass: true
};
}
});
describe(schema.ruleName, () => {
const stylelintConfig = {
rules: {
[schema.ruleName]: schema.config
}
};
let passingTestCases = schema.accept || [];
if (!schema.skipBasicChecks) {
passingTestCases = passingTestCases.concat(basicChecks);
}
if (passingTestCases && passingTestCases.length) {
describe("accept", () => {
passingTestCases.forEach(testCase => {
const spec = testCase.only ? it.only : it;
describe(JSON.stringify(schema.config), () => {
describe(JSON.stringify(testCase.code), () => {
spec(testCase.description || "no description", () => {
const options = {
code: testCase.code,
config: stylelintConfig,
syntax: schema.syntax
};
return stylelint(options).then(output => {
expect(output.results[0].warnings).toEqual([]);
expect(output.results[0].parseErrors).toEqual([]);
if (!schema.fix) return;
// Check the fix
return stylelint(
Object.assign({ fix: true }, options)
).then(output => {
const fixedCode = getOutputCss(output);
expect(fixedCode).toBe(testCase.code);
});
});
});
});
});
});
});
}
if (schema.reject && schema.reject.length) {
describe("reject", () => {
schema.reject.forEach(testCase => {
const spec = testCase.only ? it.only : it;
describe(JSON.stringify(schema.config), () => {
describe(JSON.stringify(testCase.code), () => {
spec(testCase.description || "no description", () => {
const options = {
code: testCase.code,
config: stylelintConfig,
syntax: schema.syntax
};
return stylelint(options).then(output => {
const warning = output.results[0].warnings[0];
expect(output.results[0].parseErrors).toEqual([]);
expect(testCase).toHaveMessage();
if (testCase.message !== undefined) {
expect(_.get(warning, "text")).toBe(testCase.message);
}
if (testCase.line !== undefined) {
expect(_.get(warning, "line")).toBe(testCase.line);
}
if (testCase.column !== undefined) {
expect(_.get(warning, "column")).toBe(testCase.column);
}
if (!schema.fix) return;
if (!testCase.fixed) {
throw new Error(
"If using { fix: true } in test schema, all reject cases must have { fixed: .. }"
);
}
// Check the fix
return stylelint(
Object.assign({ fix: true }, options)
).then(output => {
const fixedCode = getOutputCss(output);
expect(fixedCode).toBe(testCase.fixed);
expect(fixedCode).not.toBe(testCase.code);
});
});
});
});
});
});
});
}
});
};
function getOutputCss(output) {
const result = output.results[0]._postcssResult;
const css = result.root.toString(result.opts.syntax);
if (result.opts.syntax === less) {
// Less needs us to manually strip whitespace at the end of single-line comments ¯\_(ツ)_/¯
return css.replace(/(\n?\s*\/\/.*?)[ \t]*(\r?\n)/g, "$1$2");
}
return css;
}