/
no-multiple-empty-lines.js
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/
no-multiple-empty-lines.js
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/**
* @fileoverview Disallows multiple blank lines.
* @author Greg Cochard
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const rule = require("../../../lib/rules/no-multiple-empty-lines"),
RuleTester = require("../../../lib/testers/rule-tester");
//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------
const ruleTester = new RuleTester();
/**
* Creates the expected error message object for the specified number of lines
* @param {lines} lines - The number of lines expected.
* @returns {Object} the expected error message object
* @private
*/
function getExpectedError(lines) {
const message = lines === 1
? "More than 1 blank line not allowed."
: "More than " + lines + " blank lines not allowed.";
return {
message,
type: "Program",
column: 1
};
}
/**
* Creates the expected error message object for the specified number of lines
* @param {lines} lines - The number of lines expected.
* @returns {Object} the expected error message object
* @private
*/
function getExpectedErrorEOF(lines) {
if (typeof lines !== "number") {
lines = 0;
}
return {
message: "Too many blank lines at the end of file. Max of " + lines + " allowed.",
type: "Program",
column: 1
};
}
/**
* Creates the expected error message object for the specified number of lines
* @param {lines} lines - The number of lines expected.
* @returns {Object} the expected error message object
* @private
*/
function getExpectedErrorBOF(lines) {
if (typeof lines !== "number") {
lines = 0;
}
return {
message: "Too many blank lines at the beginning of file. Max of " + lines + " allowed.",
type: "Program",
column: 1
};
}
ruleTester.run("no-multiple-empty-lines", rule, {
valid: [
{
code: "// valid 1\nvar a = 5;\nvar b = 3;\n\n",
options: [ { max: 1 } ]
},
{
code: "// valid 2\n\nvar a = 5;\n\nvar b = 3;",
options: [ { max: 1 } ]
},
{
code: "// valid 3\nvar a = 5;\n\nvar b = 3;\n\n\n",
options: [ { max: 2 } ]
},
{
code: "// valid 4\nvar a = 5,\n b = 3;",
options: [ { max: 2 } ]
},
{
code: "// valid 5\nvar a = 5;\n\n\n\n\nvar b = 3;\n\n\n\n\n",
options: [ { max: 4 } ]
},
{
code: "// valid 6\nvar a = 5;\n/* comment */\nvar b = 5;",
options: [ { max: 0 } ]
},
{
code: "// valid 7\nvar a = 5;\n",
options: [ { max: 0 } ]
},
{
code: "// valid 8\nvar a = 5;\n",
options: [ { max: 0, maxEOF: 0 } ]
},
{
code: "// valid 9\nvar a = 1;\n\n",
options: [{ max: 2, maxEOF: 1 }]
},
{
code: "// valid 10\nvar a = 5;\n",
options: [ { max: 0, maxBOF: 0 } ]
},
{
code: "\n// valid 11\nvar a = 1;\n",
options: [{ max: 2, maxBOF: 1 }]
},
{
code: "// valid 12\r\n// windows line endings\r\nvar a = 5;\r\nvar b = 3;\r\n\r\n",
options: [ { max: 1 } ]
},
// template strings
{
code: "// valid 12\nx = `\n\n\n\nhi\n\n\n\n`",
options: [ { max: 2 } ],
parserOptions: { ecmaVersion: 6 }
},
{
code: "// valid 13\n`\n\n`",
options: [ { max: 0 } ],
parserOptions: { ecmaVersion: 6 }
},
{
code: "// valid 14\nvar a = 5;`\n\n\n\n\n`",
options: [ { max: 0, maxEOF: 0 } ],
parserOptions: { ecmaVersion: 6 }
},
{
code: "`\n\n\n\n\n`\n// valid 15\nvar a = 5;",
options: [ { max: 0, maxBOF: 0 } ],
parserOptions: { ecmaVersion: 6 }
},
{
code: "\n\n\n\n// valid 16\nvar a = 5;\n",
options: [ { max: 0, maxBOF: 4 } ]
},
{
code: "// valid 17\nvar a = 5;\n\n",
options: [ { max: 0, maxEOF: 1 } ]
},
{
code: "var a = 5;",
options: [ { max: 1 } ]
}
],
invalid: [
{
code: "// invalid 1\nvar a = 5;\n\n\nvar b = 3;",
output: "// invalid 1\nvar a = 5;\n\nvar b = 3;",
errors: [ getExpectedError(1) ],
options: [ { max: 1 } ]
},
{
code: "// invalid 2\n\n\n\n\nvar a = 5;",
output: "// invalid 2\n\n\nvar a = 5;",
errors: [ getExpectedError(2) ],
options: [ { max: 2 } ]
},
{
code: "// invalid 3\nvar a = 5;\n\n\n\n",
output: "// invalid 3\nvar a = 5;\n\n\n",
errors: [ getExpectedErrorEOF(2) ],
options: [ { max: 2 } ]
},
{
code: "// invalid 4\nvar a = 5;\n \n \n \n",
output: "// invalid 4\nvar a = 5;\n \n \n",
errors: [ getExpectedErrorEOF(2) ],
options: [ { max: 2 } ]
},
{
code: "// invalid 5\nvar a=5;\n\n\n\nvar b = 3;",
output: "// invalid 5\nvar a=5;\n\n\nvar b = 3;",
errors: [ getExpectedError(2) ],
options: [ { max: 2 } ]
},
{
code: "// invalid 6\nvar a=5;\n\n\n\nvar b = 3;\n",
output: "// invalid 6\nvar a=5;\n\n\nvar b = 3;\n",
errors: [ getExpectedError(2) ],
options: [ { max: 2 } ]
},
{
code: "// invalid 7\nvar a = 5;\n\n\n\nb = 3;\nvar c = 5;\n\n\n\nvar d = 3;",
output: "// invalid 7\nvar a = 5;\n\n\nb = 3;\nvar c = 5;\n\n\nvar d = 3;",
errors: 2,
options: [ { max: 2 } ]
},
{
code: "// invalid 8\nvar a = 5;\n\n\n\n\n\n\n\n\n\n\n\n\n\nb = 3;",
output: "// invalid 8\nvar a = 5;\n\n\nb = 3;",
errors: [ getExpectedError(2) ],
options: [ { max: 2 } ]
},
{
code: "// invalid 9\nvar a=5;\n\n\n\n\n",
output: "// invalid 9\nvar a=5;\n\n\n",
errors: [ getExpectedErrorEOF(2) ],
options: [ { max: 2 } ]
},
{
code: "// invalid 10\nvar a = 5;\n\nvar b = 3;",
output: "// invalid 10\nvar a = 5;\nvar b = 3;",
errors: [ getExpectedError(0) ],
options: [ { max: 0 } ]
},
{
code: "// invalid 11\nvar a = 5;\n\n\n",
output: "// invalid 11\nvar a = 5;\n\n",
errors: [ getExpectedErrorEOF(1) ],
options: [ { max: 5, maxEOF: 1 } ]
},
{
code: "// invalid 12\nvar a = 5;\n\n\n\n\n\n",
output: "// invalid 12\nvar a = 5;\n\n\n\n\n",
errors: [ getExpectedErrorEOF(4) ],
options: [ { max: 0, maxEOF: 4 } ]
},
{
code: "// invalid 13\n\n\n\n\n\n\n\n\nvar a = 5;\n\n\n",
output: "// invalid 13\n\n\n\n\n\n\n\n\nvar a = 5;\n\n",
errors: [ getExpectedErrorEOF(1) ],
options: [ { max: 10, maxEOF: 1 } ]
},
{
code: "// invalid 14\nvar a = 5;\n\n",
output: "// invalid 14\nvar a = 5;\n",
errors: [ getExpectedErrorEOF(0) ],
options: [ { max: 2, maxEOF: 0 } ]
},
{
code: "\n\n// invalid 15\nvar a = 5;\n",
output: "\n// invalid 15\nvar a = 5;\n",
errors: [ getExpectedErrorBOF(1) ],
options: [ { max: 5, maxBOF: 1 } ]
},
{
code: "\n\n\n\n\n// invalid 16\nvar a = 5;\n",
output: "\n\n\n\n// invalid 16\nvar a = 5;\n",
errors: [ getExpectedErrorBOF(4)],
options: [ { max: 0, maxBOF: 4 } ]
},
{
code: "\n\n// invalid 17\n\n\n\n\n\n\n\n\nvar a = 5;\n",
output: "\n// invalid 17\n\n\n\n\n\n\n\n\nvar a = 5;\n",
errors: [ getExpectedErrorBOF(1) ],
options: [ { max: 10, maxBOF: 1 } ]
},
{
code: "\n// invalid 18\nvar a = 5;\n",
output: "// invalid 18\nvar a = 5;\n",
errors: [ getExpectedErrorBOF(0) ],
options: [ { max: 2, maxBOF: 0 } ]
},
{
code: "\n\n\n// invalid 19\nvar a = 5;\n\n",
output: "// invalid 19\nvar a = 5;\n",
errors: [ getExpectedErrorBOF(0),
getExpectedErrorEOF(0) ],
options: [ { max: 2, maxBOF: 0, maxEOF: 0 } ]
},
{
code: "// invalid 20\r\n// windows line endings\r\nvar a = 5;\r\nvar b = 3;\r\n\r\n\r\n",
output: "// invalid 20\r\n// windows line endings\r\nvar a = 5;\r\nvar b = 3;\r\n\r\n",
errors: [ getExpectedErrorEOF(1) ],
options: [ { max: 1 } ]
},
{
code: "// invalid 21\n// unix line endings\nvar a = 5;\nvar b = 3;\n\n\n",
output: "// invalid 21\n// unix line endings\nvar a = 5;\nvar b = 3;\n\n",
errors: [ getExpectedErrorEOF(1) ],
options: [ { max: 1 } ]
}
]
});