/
prefer-string-slice.js
188 lines (180 loc) · 2.94 KB
/
prefer-string-slice.js
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import test from 'ava';
import avaRuleTester from 'eslint-ava-rule-tester';
import {outdent} from 'outdent';
import rule from '../rules/prefer-string-slice';
const ruleTester = avaRuleTester(test, {
env: {
es6: true
}
});
const errors = [{
ruleId: 'prefer-string-slice'
}];
ruleTester.run('prefer-string-slice', rule, {
valid: [
'const substr = foo.substr',
'const substring = foo.substring',
'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(1)',
output: '"foo".slice(1)',
errors
},
{
code: '"foo".substr(1, 2)',
output: '"foo".slice(1, 3)',
errors
},
{
code: '"foo".substr(1, length)',
output: '"foo".slice(1, 1 + length)',
errors
},
{
code: outdent`
const length = 123;
"foo".substr(1, length)
`,
output: outdent`
const length = 123;
"foo".slice(1, 1 + length)
`,
errors
},
{
code: outdent`
const length = 123;
"foo".substr(0, length)
`,
output: outdent`
const length = 123;
"foo".slice(0, length)
`,
errors
},
{
code: outdent`
const length = 123;
"foo".substr(1, length - 4)
`,
output: outdent`
const length = 123;
"foo".slice(1, 1 + length - 4)
`,
errors
},
{
code: outdent`
const uri = 'foo';
(uri || '').substr(1)
`,
output: outdent`
const uri = 'foo';
(uri || '').slice(1)
`,
errors
},
{
code: 'foo.substr(start)',
errors
},
{
code: '"foo".substr(1)',
errors
},
{
code: 'foo.substr(start, length)',
errors
},
{
code: '"foo".substr(1, 2)',
errors
},
{
code: 'foo.substring()',
output: 'foo.slice()',
errors
},
{
code: '"foo".substring()',
output: '"foo".slice()',
errors
},
{
code: '"foo".substring(1)',
output: '"foo".slice(1)',
errors
},
{
code: '"foo".substring(1, 2)',
output: '"foo".slice(1, 2)',
errors
},
{
code: '"foo".substring(2, 1)',
output: '"foo".slice(1, 2)',
errors
},
{
code: '"foo".substring(-1, -5)',
output: '"foo".slice(0, 0)',
errors
},
{
code: '"foo".substring(-1, 2)',
output: '"foo".slice(0, 2)',
errors
},
{
code: '"foo".substring(length)',
output: '"foo".slice(Math.max(0, length))',
errors
},
{
code: '"foo".substring("fo".length)',
output: '"foo".slice("fo".length)',
errors
},
{
code: '"foo".substring(0, length)',
output: '"foo".slice(0, Math.max(0, length))',
errors
},
{
code: '"foo".substring(length, 0)',
output: '"foo".slice(0, Math.max(0, length))',
errors
},
{
code: 'foo.substring(start)',
errors
},
{
code: '"foo".substring(1)',
errors
},
{
code: 'foo.substring(start, end)',
errors
},
{
code: '"foo".substring(1, 3)',
errors
}
]
});