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feat(rules): added new rule for prefer-to-have-style (#76)
* feat(rules): added new rule prefer-to-have-style * updated readme * updated readme * updated readme * updated readme fix(rules): use .range instead of start/end
1 parent e3a12dc commit 8a55022

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-117
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‎README.md‎

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@@ -95,21 +95,22 @@ module.exports = {
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## Supported Rules
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✔️ indicates that a rule is recommended for all users.
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👍 indicates that a rule is recommended for all users.
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🛠 indicates that a rule is fixable.
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🔧 indicates that a rule is fixable.
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<!-- __BEGIN AUTOGENERATED TABLE__ -->
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| Name | ✔️ | 🛠 | Description |
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| Name | 👍 | 🔧 | Description |
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| ---------------------------------------------------------------------------------------------------------------------------------------------- | --- | --- | -------------------------------------------------------------- |
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| [prefer-checked](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-checked.md) | ✔️ | 🛠 | prefer toBeChecked over checking attributes |
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| [prefer-empty](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-empty.md) | ✔️ | 🛠 | Prefer toBeEmpty over checking innerHTML |
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| [prefer-enabled-disabled](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-enabled-disabled.md) | ✔️ | 🛠 | prefer toBeDisabled or toBeEnabled over checking attributes |
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| [prefer-focus](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-focus.md) | ✔️ | 🛠 | prefer toHaveFocus over checking document.activeElement |
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| [prefer-required](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-required.md) | ✔️ | 🛠 | prefer toBeRequired over checking properties |
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| [prefer-to-have-attribute](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-to-have-attribute.md) | ✔️ | 🛠 | prefer toHaveAttribute over checking getAttribute/hasAttribute |
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| [prefer-to-have-text-content](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-to-have-text-content.md) | ✔️ | 🛠 | Prefer toHaveTextContent over checking element.textContent |
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| [prefer-checked](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-checked.md) | 👍 | 🔧 | prefer toBeChecked over checking attributes |
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| [prefer-empty](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-empty.md) | 👍 | 🔧 | Prefer toBeEmpty over checking innerHTML |
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| [prefer-enabled-disabled](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-enabled-disabled.md) | 👍 | 🔧 | prefer toBeDisabled or toBeEnabled over checking attributes |
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| [prefer-focus](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-focus.md) | 👍 | 🔧 | prefer toHaveFocus over checking document.activeElement |
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| [prefer-required](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-required.md) | 👍 | 🔧 | prefer toBeRequired over checking properties |
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| [prefer-to-have-attribute](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-to-have-attribute.md) | 👍 | 🔧 | prefer toHaveAttribute over checking getAttribute/hasAttribute |
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| [prefer-to-have-style](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-to-have-style.md) | 👍 | 🔧 | prefer toHaveStyle over checking element style |
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| [prefer-to-have-text-content](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/prefer-to-have-text-content.md) | 👍 | 🔧 | Prefer toHaveTextContent over checking element.textContent |
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<!-- __END AUTOGENERATED TABLE__ -->
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@@ -156,6 +157,7 @@ Thanks goes to these people ([emoji key][emojis]):
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<!-- markdownlint-enable -->
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<!-- prettier-ignore-end -->
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<!-- ALL-CONTRIBUTORS-LIST:END -->
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This project follows the [all-contributors][all-contributors] specification.

‎build/generate-readme-table.js‎

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@@ -15,15 +15,15 @@ const expectedTableLines = Object.keys(rules)
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lines.push(
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[
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`[${ruleId}](https://github.com/testing-library/eslint-plugin-jest-dom/blob/master/docs/rules/${ruleId}.md)`,
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rule.meta.docs.recommended ? "✔️" : "",
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rule.meta.fixable ? "🛠" : "",
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rule.meta.docs.recommended ? "👍" : "",
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rule.meta.fixable ? "🔧" : "",
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rule.meta.docs.description,
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].join(" | ")
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);
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return lines;
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},
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["Name | ✔️ | 🛠 | Description", "----- | ----- | ----- | -----"]
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["Name | 👍 | 🔧 | Description", "----- | ----- | ----- | -----"]
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)
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.join("\n");
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‎docs/rules/prefer-to-have-style.md‎

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# prefer toHaveProperty over checking element.style (prefer-to-have-style)
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This rule is an autofixable rule that reports usages of checking element.style in expect statements in preference of using the jest-dom
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`toHaveStyle` matcher.
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## Rule Details
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Examples of **incorrect** code for this rule:
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```js
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expect(el.style.foo).toBe("bar");
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expect(el.style.foo).not.toBe("bar");
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expect(el.style).toHaveProperty("background-color", "green");
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expect(screen.getByTestId("foo").style["scroll-snap-type"]).toBe("x mandatory");
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expect(el.style).toContain("background-color");
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expect(el.style).not.toContain("background-color");
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expect(el).toHaveAttribute(
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"style",
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"background-color: green; border-width: 10px; color: blue;"
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);
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```
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Examples of **correct** code for this rule:
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```js
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expect(el).toHaveStyle({ foo: "bar" });
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expect(el.style).toMatchSnapshot();
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expect(el.style).toEqual(foo);
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```
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## When Not To Use It
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If you don't care about using built in matchers for checking style on dom
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elements.
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## Further Reading
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- [jest-dom toHaveStyle](https://github.com/testing-library/jest-dom#tohavestyle)
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- [ElementCSSInlineStyle.style](https://developer.mozilla.org/en-US/docs/Web/API/ElementCSSInlineStyle/style)

‎package.json‎

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"requireindex": "^1.2.0"
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},
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"devDependencies": {
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"jest-extended": "^0.11.5",
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"kcd-scripts": "^6.0.0"
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},
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"peerDependencies": {

‎src/__tests__/__snapshots__/index.test.js.snap‎

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This file was deleted.

‎src/__tests__/index.test.js‎

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import { rules, generateRecommendedConfig } from "../index";
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import "jest-extended";
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it("should have all the rules", () => {
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expect(rules).toMatchSnapshot();
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expect(Object.keys(rules).length).toBeGreaterThan(0);
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});
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it.each(Object.keys(rules))("%s should export required fields", (ruleName) => {
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const rule = rules[ruleName];
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expect(rule).toHaveProperty("create", expect.any(Function));
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expect(rule.meta.docs.url).not.toBeEmpty();
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expect(rule.meta.docs.category).toBe("jest-dom");
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expect(rule.meta.docs.description).not.toBeEmpty();
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});
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it("should have a recommended config with recommended rules", () => {

‎src/__tests__/lib/rules/.eslintrc‎

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{"rules":{
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"no-template-curly-in-string":"off"
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}}

‎src/__tests__/lib/rules/prefer-to-have-style.js‎

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import { RuleTester } from "eslint";
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import * as rule from "../../../rules/prefer-to-have-style";
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const errors = [
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{ message: "Use toHaveStyle instead of asserting on element style" },
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];
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const ruleTester = new RuleTester({ parserOptions: { ecmaVersion: 2015 } });
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ruleTester.run("prefer-to-have-attribute", rule, {
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valid: [
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`expect(el).toHaveStyle({foo:"bar"})`,
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`expect(el.style).toMatchSnapshot()`,
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`expect(el.style).toEqual(foo)`,
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`expect(el).toHaveAttribute("style")`,
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],
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invalid: [
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{
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code: `expect(el.style.foo).toBe("bar")`,
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errors,
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output: `expect(el).toHaveStyle({foo:"bar"})`,
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},
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{
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code: `expect(el.style.foo).not.toBe("bar")`,
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errors,
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output: `expect(el).not.toHaveStyle({foo:"bar"})`,
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},
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{
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code: `expect(el.style).toHaveProperty("background-color", "green")`,
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errors,
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output: `expect(el).toHaveStyle({backgroundColor: "green"})`,
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},
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{
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code: `expect(el.style).not.toHaveProperty("background-color", "green")`,
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errors,
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output: `expect(el).not.toHaveStyle({backgroundColor: "green"})`,
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},
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{
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code: `expect(screen.getByTestId("foo").style["scroll-snap-type"]).toBe("x mandatory")`,
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errors,
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output: `expect(screen.getByTestId("foo")).toHaveStyle({scrollSnapType: "x mandatory"})`,
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},
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{
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code: `expect(screen.getByTestId("foo").style["scroll-snap-type"]).not.toBe("x mandatory")`,
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errors,
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output: `expect(screen.getByTestId("foo")).not.toHaveStyle({scrollSnapType: "x mandatory"})`,
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},
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{
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code: `expect(el.style).toContain("background-color")`,
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errors,
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output: `expect(el).toHaveStyle({backgroundColor: expect.anything()})`,
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},
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{
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code: `expect(el.style).not.toContain("background-color")`,
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errors,
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output: `expect(el).not.toHaveStyle({backgroundColor: expect.anything()})`,
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},
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{
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code: `expect(el).toHaveAttribute("style", "background-color: green; border-width: 10px; color: blue;")`,
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errors,
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output: `expect(el).toHaveStyle("background-color: green; border-width: 10px; color: blue;")`,
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},
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],
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});

‎src/createBannedAttributeRule.js‎

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@@ -39,7 +39,7 @@ export default ({ preferred, negatedPreferred, attributes }) => (context) => {
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node
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) {
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const {
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arguments: [{ property, property: { name } = {} }],
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arguments: [{ object, property, property: { name } = {} }],
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} = node.callee.object;
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const matcher = node.callee.property.name;
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const matcherArg = node.arguments.length && node.arguments[0].value;
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node,
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message: `Use ${correctFunction}() instead of checking .${name} directly`,
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fix: (fixer) => [
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fixer.removeRange([property.range[0] - 1, property.range[1]]),
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fixer.removeRange([object.range[1], property.range[1]]),
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fixer.replaceTextRange(
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[node.callee.property.range[0], node.range[1]],
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`${correctFunction}()`

‎src/rules/prefer-empty.js‎

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node,
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message: "Use toBeEmptyDOMElement instead of checking inner html.",
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fix: (fixer) => [
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fixer.removeRange([node.left.property.range[0] - 1, node.range[1]]),
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fixer.removeRange([node.left.object.range[1], node.range[1]]),
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fixer.replaceText(
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node.parent.parent.property,
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Boolean(node.parent.parent.parent.arguments[0].value) ===
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node,
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message: "Use toBeEmptyDOMElement instead of checking inner html.",
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fix: (fixer) => [
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fixer.removeRange([node.left.property.range[0] - 1, node.range[1]]),
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fixer.removeRange([node.left.object.range[1], node.range[1]]),
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fixer.replaceText(
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node.parent.parent.property,
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Boolean(node.parent.parent.parent.arguments[0].value) ===
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node,
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message: "Use toBeEmptyDOMElement instead of checking inner html.",
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fix: (fixer) => [
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fixer.removeRange([node.property.range[0] - 1, node.property.range[1]]),
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fixer.removeRange([node.object.range[1], node.property.range[1]]),
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fixer.replaceText(node.parent.parent.property, "toBeEmptyDOMElement"),
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fixer.remove(node.parent.parent.parent.arguments[0]),
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],
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node,
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message: "Use toBeEmptyDOMElement instead of checking inner html.",
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fix: (fixer) => [
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fixer.removeRange([node.property.range[0] - 1, node.property.range[1]]),
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fixer.removeRange([node.object.range[1], node.property.range[1]]),
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fixer.replaceText(
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node.parent.parent.parent.property,
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"toBeEmptyDOMElement"
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node,
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message: "Use toBeEmptyDOMElement instead of checking inner html.",
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fix: (fixer) => [
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fixer.removeRange([node.property.range[0] - 1, node.property.range[1]]),
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fixer.removeRange([node.object.range[1], node.property.range[1]]),
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fixer.replaceText(node.parent.parent.property, "toBeEmptyDOMElement"),
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],
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});
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node,
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message: "Use toBeEmptyDOMElement instead of checking inner html.",
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fix: (fixer) => [
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fixer.removeRange([node.property.range[0] - 1, node.property.range[1]]),
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fixer.removeRange([node.object.range[1], node.property.range[1]]),
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fixer.replaceText(
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node.parent.parent.parent.property,
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"toBeEmptyDOMElement"
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node,
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message: "Use toBeEmptyDOMElement instead of checking inner html.",
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fix: (fixer) => [
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fixer.removeRange([node.property.range[0] - 1, node.property.range[1]]),
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fixer.removeRange([node.object.range[1], node.property.range[1]]),
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fixer.replaceText(
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node.parent.parent.parent.property,
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"toBeEmptyDOMElement"
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node,
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message: "Use toBeEmptyDOMElement instead of checking inner html.",
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fix: (fixer) => [
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fixer.removeRange([node.property.range[0] - 1, node.property.range[1]]),
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fixer.removeRange([node.object.range[1], node.property.range[1]]),
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fixer.replaceText(node.parent.parent.property, "toBeEmptyDOMElement"),
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fixer.remove(node.parent.parent.parent.arguments[0]),
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],

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