eslint/tests/lib/rules/no-empty.js

   1 /**
   2  * @fileoverview Tests for no-empty rule.
   3  * @author Nicholas C. Zakas
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Requirements
  10 //------------------------------------------------------------------------------
  11
  12 const rule = require("../../../lib/rules/no-empty"),
  13     { RuleTester } = require("../../../lib/rule-tester");
  14
  15 //------------------------------------------------------------------------------
  16 // Tests
  17 //------------------------------------------------------------------------------
  18
  19 const ruleTester = new RuleTester();
  20
  21 ruleTester.run("no-empty", rule, {
  22     valid: [
  23         "if (foo) { bar() }",
  24         "while (foo) { bar() }",
  25         "for (;foo;) { bar() }",
  26         "try { foo() } catch (ex) { foo() }",
  27         "switch(foo) {case 'foo': break;}",
  28         "(function() { }())",
  29         { code: "var foo = () => {};", parserOptions: { ecmaVersion: 6 } },
  30         "function foo() { }",
  31         "if (foo) {/* empty */}",
  32         "while (foo) {/* empty */}",
  33         "for (;foo;) {/* empty */}",
  34         "try { foo() } catch (ex) {/* empty */}",
  35         "try { foo() } catch (ex) {// empty\n}",
  36         "try { foo() } finally {// empty\n}",
  37         "try { foo() } finally {// test\n}",
  38         "try { foo() } finally {\n \n // hi i am off no use\n}",
  39         "try { foo() } catch (ex) {/* test111 */}",
  40         "if (foo) { bar() } else { // nothing in me \n}",
  41         "if (foo) { bar() } else { /**/ \n}",
  42         "if (foo) { bar() } else { // \n}",
  43         { code: "try { foo(); } catch (ex) {}", options: [{ allowEmptyCatch: true }] },
  44         { code: "try { foo(); } catch (ex) {} finally { bar(); }", options: [{ allowEmptyCatch: true }] }
  45     ],
  46     invalid: [
  47         { code: "try {} catch (ex) {throw ex}", errors: [{ messageId: "unexpected", data: { type: "block" }, type: "BlockStatement" }] },
  48         { code: "try { foo() } catch (ex) {}", errors: [{ messageId: "unexpected", data: { type: "block" }, type: "BlockStatement" }] },
  49         { code: "try { foo() } catch (ex) {throw ex} finally {}", errors: [{ messageId: "unexpected", data: { type: "block" }, type: "BlockStatement" }] },
  50         { code: "if (foo) {}", errors: [{ messageId: "unexpected", data: { type: "block" }, type: "BlockStatement" }] },
  51         { code: "while (foo) {}", errors: [{ messageId: "unexpected", data: { type: "block" }, type: "BlockStatement" }] },
  52         { code: "for (;foo;) {}", errors: [{ messageId: "unexpected", data: { type: "block" }, type: "BlockStatement" }] },
  53         { code: "switch(foo) {}", errors: [{ messageId: "unexpected", data: { type: "switch" }, type: "SwitchStatement" }] },
  54         {
  55             code: "try {} catch (ex) {}",
  56             options: [{ allowEmptyCatch: true }],
  57             errors: [{ messageId: "unexpected", data: { type: "block" }, type: "BlockStatement" }]
  58         },
  59         {
  60             code: "try { foo(); } catch (ex) {} finally {}",
  61             options: [{ allowEmptyCatch: true }],
  62             errors: [{ messageId: "unexpected", data: { type: "block" }, type: "BlockStatement" }]
  63         },
  64         {
  65             code: "try {} catch (ex) {} finally {}",
  66             options: [{ allowEmptyCatch: true }],
  67             errors: [
  68                 { messageId: "unexpected", data: { type: "block" }, type: "BlockStatement" },
  69                 { messageId: "unexpected", data: { type: "block" }, type: "BlockStatement" }
  70             ]
  71         },
  72         {
  73             code: "try { foo(); } catch (ex) {} finally {}",
  74             errors: [
  75                 { messageId: "unexpected", data: { type: "block" }, type: "BlockStatement" },
  76                 { messageId: "unexpected", data: { type: "block" }, type: "BlockStatement" }
  77             ]
  78         }
  79     ]
  80 });