firefox/devtools/shared/tests/xpcshell/test_prettifyCSS.js

/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

// Test prettifyCSS.

"use strict";

const {
  prettifyCSS,
} = require("resource://devtools/shared/inspector/css-logic.js");

const EXPAND_TAB = "devtools.editor.expandtab";
const TAB_SIZE = "devtools.editor.tabsize";

const TESTS_TAB_INDENT = [
  {
    name: "simple test. indent using tabs",
    input: "div { font-family:'Arial Black', Arial, sans-serif; }",
    expected: ["div {", "\tfont-family:'Arial Black', Arial, sans-serif;", "}"],
  },

  {
    name: "whitespace before open brace. indent using tabs",
    input: "div{}",
    expected: ["div {", "}"],
  },

  {
    name: "minified with trailing newline. indent using tabs",
    input:
      "\nbody{background:white;}div{font-size:4em;color:red}span{color:green;}\n",
    expected: [
      "body {",
      "\tbackground:white;",
      "}",
      "div {",
      "\tfont-size:4em;",
      "\tcolor:red",
      "}",
      "span {",
      "\tcolor:green;",
      "}",
    ],
  },

  {
    name: "leading whitespace. indent using tabs",
    input: "\n    div{color: red;}",
    expected: ["div {", "\tcolor: red;", "}"],
  },

  {
    name: "CSS with extra closing brace. indent using tabs",
    input: "body{margin:0}} div{color:red}",
    expected: ["body {", "\tmargin:0", "}", "}", "div {", "\tcolor:red", "}"],
  },
];

const TESTS_SPACE_INDENT = [
  {
    name: "simple test. indent using spaces",
    input: "div { font-family:'Arial Black', Arial, sans-serif; }",
    expected: [
      "div {",
      "    font-family:'Arial Black', Arial, sans-serif;",
      "}",
    ],
  },

  {
    name: "whitespace before open brace. indent using spaces",
    input: "div{}",
    expected: ["div {", "}"],
  },

  {
    name: "minified with trailing newline. indent using spaces",
    input:
      "\nbody{background:white;}div{font-size:4em;color:red}span{color:green;}\n",
    expected: [
      "body {",
      "    background:white;",
      "}",
      "div {",
      "    font-size:4em;",
      "    color:red",
      "}",
      "span {",
      "    color:green;",
      "}",
    ],
  },

  {
    name: "leading whitespace. indent using spaces",
    input: "\n    div{color: red;}",
    expected: ["div {", "    color: red;", "}"],
  },

  {
    name: "CSS with extra closing brace. indent using spaces",
    input: "body{margin:0}} div{color:red}",
    expected: [
      "body {",
      "    margin:0",
      "}",
      "}",
      "div {",
      "    color:red",
      "}",
    ],
  },

  {
    name: "HTML comments with some whitespace padding",
    input: "  \n\n\t  <!--\n\n\t body {color:red}  \n\n-->   \t\n",
    expected: ["body {", "    color:red", "}"],
  },

  {
    name: "HTML comments without whitespace padding",
    input: "<!--body {color:red}-->",
    expected: ["body {", "    color:red", "}"],
  },

  {
    name: "Breaking after commas in selectors",
    input:
      "@media screen, print {div, span, input {color: red;}}" +
      "div, div, input, pre, table {color: blue;}",
    expected: [
      "@media screen, print {",
      "    div,",
      "    span,",
      "    input {",
      "        color: red;",
      "    }",
      "}",
      "div,",
      "div,",
      "input,",
      "pre,",
      "table {",
      "    color: blue;",
      "}",
    ],
  },

  {
    name: "Multiline comment in CSS",
    input: "/*\n * comment\n */\n#example{display:grid;}",
    expected: [
      "/*",
      " * comment",
      " */",
      "#example {",
      "    display:grid;",
      "}",
    ],
  },
];

function run_test() {
  // Note that prettifyCSS.LINE_SEPARATOR is computed lazily, so we
  // ensure it is set.
  prettifyCSS("");

  Services.prefs.setBoolPref(EXPAND_TAB, true);
  Services.prefs.setIntPref(TAB_SIZE, 4);

  for (const test of TESTS_SPACE_INDENT) {
    info(test.name);

    const input = test.input.split("\n").join(prettifyCSS.LINE_SEPARATOR);
    const { result: output } = prettifyCSS(input);
    const expected =
      test.expected.join(prettifyCSS.LINE_SEPARATOR) +
      prettifyCSS.LINE_SEPARATOR;
    equal(output, expected, test.name);
  }

  Services.prefs.setBoolPref(EXPAND_TAB, false);
  for (const test of TESTS_TAB_INDENT) {
    info(test.name);

    const input = test.input.split("\n").join(prettifyCSS.LINE_SEPARATOR);
    const { result: output } = prettifyCSS(input);
    const expected =
      test.expected.join(prettifyCSS.LINE_SEPARATOR) +
      prettifyCSS.LINE_SEPARATOR;
    equal(output, expected, test.name);
  }
  Services.prefs.clearUserPref(EXPAND_TAB);
  Services.prefs.clearUserPref(TAB_SIZE);
}