📄 no-unnecessary-template-expression.test.ts¶
📊 Analysis Summary¶
| Metric | Count |
|---|---|
| 📦 Imports | 5 |
| 📊 Variables & Constants | 2 |
📚 Table of Contents¶
🛠️ File Location:¶
📂 packages/eslint-plugin/tests/rules/no-unnecessary-template-expression.test.ts
📦 Imports¶
| Name | Source |
|---|---|
InvalidTestCase |
@typescript-eslint/rule-tester |
noFormat |
@typescript-eslint/rule-tester |
RuleTester |
@typescript-eslint/rule-tester |
rule |
../../src/rules/no-unnecessary-template-expression |
getFixturesRootDir |
../RuleTester |
Variables & Constants¶
| Name | Type | Kind | Value | Exported |
|---|---|---|---|---|
ruleTester |
any |
const | `new RuleTester({ | |
| languageOptions: { | ||||
| parserOptions: { | ||||
| project: './tsconfig.json', | ||||
| tsconfigRootDir: rootPath, | ||||
| }, | ||||
| }, | ||||
| })` | ✗ | |||
invalidCases |
readonly [{ readonly code: "${1};"; readonly errors: readonly [{ readonly column: 2; readonly endColumn: 6; readonly line: 1; readonly messageId: "noUnnecessaryTemplateExpression"; }]; readonly output: "1;"; }, ... 99 more ..., { ...; }] |
const | `[ | |
| { | ||||
code: '${1};', |
||||
| errors: [ | ||||
| { | ||||
| column: 2, | ||||
| endColumn: 6, | ||||
| line: 1, | ||||
| messageId: 'noUnnecessaryTemplateExpression', | ||||
| }, | ||||
| ], | ||||
output: '1;', |
||||
| }, | ||||
| { | ||||
code: '${1n};', |
||||
| errors: [ | ||||
| { | ||||
| column: 2, | ||||
| endColumn: 7, | ||||
| line: 1, | ||||
| messageId: 'noUnnecessaryTemplateExpression', | ||||
| }, | ||||
| ], | ||||
output: '1;', |
||||
| }, | ||||
| { | ||||
code: '${0o25};', |
||||
| errors: [ | ||||
| { | ||||
| column: 2, | ||||
| endColumn: 9, | ||||
| line: 1, | ||||
| messageId: 'noUnnecessaryTemplateExpression', | ||||
| }, | ||||
| ], | ||||
output: '21;', |
||||
| }, | ||||
| { | ||||
code: '${0b1010} ${0b1111};', |
||||
| errors: [ | ||||
| { | ||||
| column: 2, | ||||
| endColumn: 11, | ||||
| line: 1, | ||||
| messageId: 'noUnnecessaryTemplateExpression', | ||||
| }, | ||||
| { | ||||
| column: 12, | ||||
| endColumn: 21, | ||||
| line: 1, | ||||
| messageId: 'noUnnecessaryTemplateExpression', | ||||
| }, | ||||
| ], | ||||
output: '10 15;', |
||||
| }, | ||||
| { | ||||
code: '${0x25};', |
||||
| errors: [ | ||||
| { | ||||
| column: 2, | ||||
| endColumn: 9, | ||||
| line: 1, | ||||
| messageId: 'noUnnecessaryTemplateExpression', | ||||
| }, | ||||
| ], | ||||
output: '37;', |
||||
| }, | ||||
| { | ||||
code: '${/a/};', |
||||
| errors: [ | ||||
| { | ||||
| column: 2, | ||||
| endColumn: 8, | ||||
| line: 1, | ||||
| messageId: 'noUnnecessaryTemplateExpression', | ||||
| }, | ||||
| ], | ||||
output: '/a/;', |
||||
| }, | ||||
| { | ||||
code: '${/a/gim};', |
||||
| errors: [ | ||||
| { | ||||
| column: 2, | ||||
| endColumn: 11, | ||||
| line: 1, | ||||
| messageId: 'noUnnecessaryTemplateExpression', | ||||
| }, | ||||
| ], | ||||
output: '/a/gim;', |
||||
| }, |
{
code: noFormat\\${ 1 }`;,
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: '1`;',
},
{
code: noFormat\\${ 'a' }`;,
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output:'a';`,
},
{
code: noFormat\\${ "a" }`;,
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output:"a";`,
},
{
code: noFormat\\${ 'a' + 'b' }`;,
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output:'a' + 'b';`,
},
{
code: '${true};',
errors: [
{
column: 2,
endColumn: 9,
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'true;',
},
{
code: noFormat\\${ true }`;,
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'true`;',
},
{
code: '${null};',
errors: [
{
column: 2,
endColumn: 9,
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'null;',
},
{
code: noFormat\\${ null }`;,
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'null`;',
},
{
code: '${undefined};',
errors: [
{
column: 2,
endColumn: 14,
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'undefined;',
},
{
code: noFormat\\${ undefined }`;,
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'undefined`;',
},
{
code: '${Infinity};',
errors: [
{
column: 2,
endColumn: 13,
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'Infinity;',
},
{
code: '${NaN};',
errors: [
{
column: 2,
endColumn: 8,
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'NaN;',
},
{
code: "${'a'} ${'b'};",
errors: [
{
column: 2,
endColumn: 8,
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
{
column: 9,
endColumn: 15,
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'a b;',
},
{
code: noFormat\\${ 'a' } \${ 'b' }`;,
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'a b`;',
},
{
code: "use${'less'};",
errors: [
{
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'useless;',
},
{
code: 'use${less};',
errors: [
{
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'useless;',
},
{
code: noFormat\u\${
// hopefully this comment is not needed.
'se'
}\${
`le\${ `ss` }`
}`;
,
errors: [
{
column: 2,
endColumn: 2,
endLine: 8,
line: 6,
messageId: 'noUnnecessaryTemplateExpression',
},
{
column: 6,
endColumn: 17,
endLine: 7,
line: 7,
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: [
`u\${
// hopefully this comment is not needed.
'se'
}le\${ `ss` }`;
,
`u\${
// hopefully this comment is not needed.
'se'
}less`;
,
],
},
{
code: noFormat
`use\${
`less`
}`;
,
errors: [
{
column: 5,
endColumn: 2,
endLine: 4,
line: 2,
messageId: 'noUnnecessaryTemplateExpression',
},
],
output:
`useless`;
`,
},
{
code: "${'1 + 1 ='} ${2};",
errors: [
{
column: 2,
endColumn: 14,
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
{
column: 15,
endColumn: 19,
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: '1 + 1 = 2;',
},
{
code: "${'a'} ${true};",
errors: [
{
column: 2,
endColumn: 8,
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
{
column: 9,
endColumn: 16,
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'a true;',
},
{
code: "${String(Symbol.for('test'))};",
errors: [
{
column: 2,
endColumn: 31,
line: 1,
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: "String(Symbol.for('test'));",
},
{
code: "${''};",
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: "'';",
},
{
code: "back${''}tick;",
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'back\tick;',
},
{
code: "dollar${'${this is test}'}sign;",
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'dollar\\${\\this is test\}sign;',
},
{
code: 'complex${\'${"${test}"}\'}case;',
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'complex\\\${"\\\${test}\\"}\case;',
},
{
code: "some ${'\\\\${test}'} string;",
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'some \\\\\\${test} string;',
},
{
code: "some ${'\\\\'} string;",
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'some \\\string;',
},
{
code: 'some ${//} string;',
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'some /\/ string;',
},
{
code: 'some ${/\\/} string;',
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'some /\\\/ string;',
},
{
code: 'some ${/\\\\/} string;',
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'some /\\\\\/ string;',
},
{
code: 'some ${/\\\\\\/} string;',
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'some /\\\\\\\/ string;',
},
{
code: 'some ${/${}/} string;',
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'some /\\${}/ string;',
},
{
code: 'some ${/$ {}/} string;',
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'some /$ {}/ string;',
},
{
code: 'some ${/\\\\/} string;',
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'some /\\\\\\\\/ string;',
},
{
code: 'some ${/\\\\\\b/} string;',
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'some /\\\\\\\\\\\\b/ string;',
},
{
code: 'some ${/\\\\\\\\/} string;',
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: 'some /\\\\\\\\\\\\\\\\/ string;',
},
{
code: "${''};",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ';',
},
{
code: noFormat\ \${""} `;,
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ' ;',
},
{
code: ' ${} `;',
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` `;',
},
{
code: noFormat`\` \${'\\\`'} \`;`,
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` \\` `;',
},
{
code: "` ${'\\\\`'} `;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` \\\\\\` `;',
},
{
code: "` ${'$'}{} `;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` \\${} `;',
},
{
code: noFormat`\` \${'\\$'}{} \`;`,
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` \\${} `;',
},
{
code: "` ${'\\\\$'}{} `;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` \\\\\\${} `;',
},
{
code: "` ${'\\\\$ '}{} `;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` \\\\$ {} `;',
},
{
code: noFormat`\` \${'\\\\\\$'}{} \`;`,
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` \\\\\\${} `;',
},
{
code: "` \\\\${'\\\\$'}{} `;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` \\\\\\\\\\${} `;',
},
{
code: "` $${'{$'}{} `;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` \\${\\${} `;',
},
{
code: "` $${'${$'}{} `;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` $\\${\\${} `;',
},
{
code: "` ${'foo$'}{} `;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` foo\\${} `;',
},
{
code: '` ${`$`} `;',
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` $ `;',
},
{
code: '` ${`$`}{} `;',
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` \\${} `;',
},
{
code: '` ${`$`} {} `;',
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` $ {} `;',
},
{
code: '` ${`$`}${undefined}{} `;',
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: ['` $${undefined}{} `;', '` $undefined{} `;'],
},
{
code: '` ${`foo$`}{} `;',
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '` foo\\${} `;',
},
{
code: "` ${'$'}${''}{} `;",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: ["` \\$${''}{} `;", '` \\${} `;'],
},
{
code: "` ${'$'}${}{} ;",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: [' \$${}{} `;', '` \\${} `;'],
},
{
code: "` ${'foo$'}${''}${}{} ;",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: [" foo\$${''}{} ;", ' foo\${} ;'],
},
{
code: " $${'{}'} ;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ' \${} ;',
},
{
code: " $${undefined}${'{}'} ;",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: [" $undefined${'{}'} ;", ' $undefined{} ;'],
},
{
code: " $${''}${undefined}${'{}'} ;",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: [' $${undefined}{} ;', ' $undefined{} ;'],
},
{
code: " \$${'{}'} ;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ' \${} ;',
},
{
code: " $${'foo'}${'{'} ;",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: [" $foo${'{'} ;", ' $foo{ ;'],
},
{
code: " $${'{ foo'}${'{'} ;",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: [" \${ foo${'{'} ;", ' \${ foo{ ;'],
},
{
code: " \\$${'{}'} ;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ' \\\${} ;',
},
{
code: " \\\$${'{}'} ;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ' \\\${} ;',
},
{
code: " foo$${'{}'} ;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ' foo\${} ;',
},
{
code: " $${''}${'{}'} ;",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: [" \$${'{}'} ;", ' \${} ;'],
},
{
code: " $${''} ;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ' $ ;',
},
{
code: ' $${{}} ;',
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ' \${} ;',
},
{
code: ' $${}${`{}`} `;',
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: ['` \\$${`{}`} `;', '` \\${} `;'],
},
{
code: '` $${}${foo{}} ;',
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: [' $${foo{}} ;', ' $foo{} ;'],
},
{
code: " $${${''}${${}`}`}${`{a}`} `;",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: [
"` \\$${''}${`${}}${};",
'\\$${``}{a};',
'\\${a};',
],
},
{
code: "$${''}${{}};",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: ['\\$${{}};', '\\${};'],
},
{
code: "$${``}${'{}'};",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: ["\\$${'{}'};", '\\${};'],
},
{
code: "$${''}${``}${'{}'};",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: ['\\$${``}{};', '\\${};'],
},
{
code: "${'$'};",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '$;',
},
{
code: "${'$'}${'{}'};",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: ["\\$${'{}'};", '\\${};'],
},
{
code: "${'$'}${''}${'{'};",
errors: [
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
{ messageId: 'noUnnecessaryTemplateExpression' },
],
output: ["\\$${''}{;", '\\${;'],
},
{
code: '${\n\$}{};',
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '\n\\${};',
},
{
code: '${\n\\$}{};',
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '\n\\\\\\${};',
},
{
code: "${'\\u00E5'};",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: "'\u00E5';",
},
{
code: "${'\\n'};",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: "'\n';",
},
{
code: "${'\\u00E5'};",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '\\u00E5;',
},
{
code: "${'\\n'};",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: '\\n;',
},
{
code: noFormat\ \${"\n"} `;,
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ' \n ;',
},
{
code: ' ${\\n} ;',
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ' \n ;',
},
{
code: noFormat` \${ 'A\u0307\u0323' } `;,
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ' A\u0307\u0323 ;',
},
{
code: " ${'👨👩👧👦'} ;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ' 👨👩👧👦 ;',
},
{
code: " ${'\ud83d\udc68'} ;",
errors: [{ messageId: 'noUnnecessaryTemplateExpression' }],
output: ' \ud83d\udc68 ;',
},
{
code:
`
this code does not have trailing whitespace: \${' '}\n even though it might look it.`;
,
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output:
`
this code does not have trailing whitespace: \n even though it might look it.`;
,
},
{
code:
`
this code has trailing position template expression \${'but it isn\'t whitespace'}
`;
,
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output:
`
this code has trailing position template expression but it isn\'t whitespace
`;
,
},
{
code: noFormat
`trailing whitespace followed by escaped windows newline: \${' '}\r\n`;
,
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output:
`trailing whitespace followed by escaped windows newline: \r\n`;
,
},
{
code:
`template literal with interpolations followed by newline: \${` \${'interpolation'} `}
`;
,
errors: [
{
messageId: 'noUnnecessaryTemplateExpression',
},
{
messageId: 'noUnnecessaryTemplateExpression',
},
],
output: [
`template literal with interpolations followed by newline: \${'interpolation'}${' '}
`;
,
`template literal with interpolations followed by newline: interpolation${' '}
`;
`,
],
},
] as const satisfies readonly InvalidTestCase<
'noUnnecessaryTemplateExpression',
[]
[]` | ✗ |