add file

node_modules/eslint-template-visitor/examples/prefer-string-slice/_common.js

@@ -0,0 +1,43 @@
+
+const errors = [ {
+	ruleId: 'prefer-string-slice',
+} ];
+
+module.exports = (ruleTester, rule) => ruleTester.run('prefer-string-slice', rule, {
+	valid: [
+		'foo.slice()',
+		'foo.slice(0)',
+		'foo.slice(1, 2)',
+		'foo.slice(-3, -2)',
+	],
+
+	invalid: [
+		{
+			code: 'foo.substr()',
+			output: 'foo.slice()',
+			errors,
+		},
+		{
+			code: '"foo".substr()',
+			output: '"foo".slice()',
+			errors,
+		},
+
+		{
+			code: 'foo.substr(start)',
+			errors,
+		},
+		{
+			code: '"foo".substr(1)',
+			errors,
+		},
+		{
+			code: 'foo.substr(start, length)',
+			errors,
+		},
+		{
+			code: '"foo".substr(1, 3)',
+			errors,
+		},
+	],
+});

node_modules/eslint-template-visitor/examples/prefer-string-slice/after.js

@@ -0,0 +1,41 @@
+'use strict';
+const eslintTemplateVisitor = require('../..');
+
+const templates = eslintTemplateVisitor();
+
+const objectVariable = templates.variable();
+const argumentsVariable = templates.spreadVariable();
+
+const substrCallTemplate = templates.template`${objectVariable}.substr(${argumentsVariable})`;
+
+const create = context => {
+	const sourceCode = context.getSourceCode();
+
+	return templates.visitor({
+		[substrCallTemplate](node) {
+			const objectNode = substrCallTemplate.context.getMatch(objectVariable);
+			const argumentNodes = substrCallTemplate.context.getMatch(argumentsVariable);
+
+			const problem = {
+				node,
+				message: 'Prefer `String#slice()` over `String#substr()`.',
+			};
+
+			const canFix = argumentNodes.length === 0;
+
+			if (canFix) {
+				problem.fix = fixer => fixer.replaceText(node, sourceCode.getText(objectNode) + '.slice()');
+			}
+
+			context.report(problem);
+		},
+	});
+};
+
+module.exports = {
+	create,
+	meta: {
+		type: 'suggestion',
+		fixable: 'code',
+	},
+};

node_modules/eslint-template-visitor/examples/prefer-string-slice/after.test.js

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+
+import test from 'ava';
+import avaRuleTester from 'eslint-ava-rule-tester';
+
+import run from './_common';
+import rule from './after';
+
+const ruleTester = avaRuleTester(test, {
+	env: {
+		es6: true,
+	},
+});
+
+run(ruleTester, rule);

node_modules/eslint-template-visitor/examples/prefer-string-slice/before.js

@@ -0,0 +1,39 @@
+'use strict';
+
+const create = context => {
+	const sourceCode = context.getSourceCode();
+
+	return {
+		CallExpression(node) {
+			if (node.callee.type !== 'MemberExpression'
+				|| node.callee.property.type !== 'Identifier'
+				|| node.callee.property.name !== 'substr'
+			) {
+				return;
+			}
+
+			const objectNode = node.callee.object;
+
+			const problem = {
+				node,
+				message: 'Prefer `String#slice()` over `String#substr()`.',
+			};
+
+			const canFix = node.arguments.length === 0;
+
+			if (canFix) {
+				problem.fix = fixer => fixer.replaceText(node, sourceCode.getText(objectNode) + '.slice()');
+			}
+
+			context.report(problem);
+		},
+	};
+};
+
+module.exports = {
+	create,
+	meta: {
+		type: 'suggestion',
+		fixable: 'code',
+	},
+};

node_modules/eslint-template-visitor/examples/prefer-string-slice/before.test.js

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+
+import test from 'ava';
+import avaRuleTester from 'eslint-ava-rule-tester';
+
+import run from './_common';
+import rule from './before';
+
+const ruleTester = avaRuleTester(test, {
+	env: {
+		es6: true,
+	},
+});
+
+run(ruleTester, rule);