The Tor Browser: toolkit/devtools/pretty-fast/tests/unit/test.js@b8a032363ba2 (annotated)

toolkit/devtools/pretty-fast/tests/unit/test.js@b8a032363ba2 (annotated)

toolkit/devtools/pretty-fast/tests/unit/test.js

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
  * Copyright 2013 Mozilla Foundation and contributors
  * Licensed under the New BSD license. See LICENSE.md or:
  * http://opensource.org/licenses/BSD-2-Clause
  */
 var prettyFast = this.prettyFast || require("./pretty-fast");
 var testCases = [
   {
     name: "Simple function",
     input: "function foo() { bar(); }",
     output: "function foo() {\n" +
             "  bar();\n" +
             "}\n",
     mappings: [
       // function foo() {
       {
         inputLine: 1,
         outputLine: 1
       },
       // bar();
       {
         inputLine: 1,
         outputLine: 2
       },
       // }
       {
         inputLine: 1,
         outputLine: 3
       },
     ]
   },
   {
     name: "Nested function",
     input: "function foo() { function bar() { debugger; } bar(); }",
     output: "function foo() {\n" +
             "  function bar() {\n" +
             "    debugger;\n" +
             "  }\n" +
             "  bar();\n" +
             "}\n",
     mappings: [
       // function bar() {
       {
         inputLine: 1,
         outputLine: 2
       },
       // debugger;
       {
         inputLine: 1,
         outputLine: 3
       },
       // bar();
       {
         inputLine: 1,
         outputLine: 5
       },
     ]
   },
   {
     name: "Immediately invoked function expression",
     input: "(function(){thingy()}())",
     output: "(function () {\n" +
             "  thingy()\n" +
             "}())\n"
   },
   {
     name: "Single line comment",
     input: "// Comment\n" +
            "function foo() { bar(); }\n",
     output: "// Comment\n" +
             "function foo() {\n" +
             "  bar();\n" +
             "}\n",
     mappings: [
       // // Comment
       {
         inputLine: 1,
         outputLine: 1
       }
     ]
   },
   {
     name: "Multi line comment",
     input: "/* Comment\n" +
            "more comment */\n" +
            "function foo() { bar(); }\n",
     output: "/* Comment\n" +
             "more comment */\n" +
             "function foo() {\n" +
             "  bar();\n" +
             "}\n",
     mappings: [
       // /* Comment
       {
         inputLine: 1,
         outputLine: 1
       },
       // \nmore comment */
       {
         inputLine: 1,
         outputLine: 2
       }
     ]
   },
   {
     name: "Null assignment",
     input: "var i=null;\n",
     output: "var i = null;\n",
     mappings: [
       {
         inputLine: 1,
         outputLine: 1
       }
     ]
   },
   {
     name: "Undefined assignment",
     input: "var i=undefined;\n",
     output: "var i = undefined;\n"
   },
   {
     name: "Void 0 assignment",
     input: "var i=void 0;\n",
     output: "var i = void 0;\n"
   },
   {
     name: "This property access",
     input: "var foo=this.foo;\n",
     output: "var foo = this.foo;\n"
   },
   {
     name: "True assignment",
     input: "var foo=true;\n",
     output: "var foo = true;\n"
   },
   {
     name: "False assignment",
     input: "var foo=false;\n",
     output: "var foo = false;\n"
   },
   {
     name: "For loop",
     input: "for (var i = 0; i < n; i++) { console.log(i); }",
     output: "for (var i = 0; i < n; i++) {\n" +
             "  console.log(i);\n" +
             "}\n",
     mappings: [
       // for (var i = 0; i < n; i++) {
       {
         inputLine: 1,
         outputLine: 1
       },
       // console.log(i);
       {
         inputLine: 1,
         outputLine: 2
       },
     ]
   },
   {
     name: "String with semicolon",
     input: "var foo = ';';\n",
     output: "var foo = ';';\n"
   },
   {
     name: "String with quote",
     input: "var foo = \"'\";\n",
     output: "var foo = '\\'';\n"
   },
   {
     name: "Function calls",
     input: "var result=func(a,b,c,d);",
     output: "var result = func(a, b, c, d);\n"
   },
   {
     name: "Regexp",
     input: "var r=/foobar/g;",
     output: "var r = /foobar/g;\n"
   },
   {
     name: "In operator",
     input: "if(foo in bar){doThing()}",
     output: "if (foo in bar) {\n" +
             "  doThing()\n" +
             "}\n"
   },
   {
     name: "With statement",
     input: "with(obj){crock()}",
     output: "with (obj) {\n" +
             "  crock()\n" +
             "}\n"
   },
   {
     name: "New expression",
     input: "var foo=new Foo();",
     output: "var foo = new Foo();\n"
   },
   {
     name: "Continue/break statements",
     input: "while(1){if(x){continue}if(y){break}if(z){break foo}}",
     output: "while (1) {\n" +
             "  if (x) {\n" +
             "    continue\n" +
             "  }\n" +
             "  if (y) {\n" +
             "    break\n" +
             "  }\n" +
             "  if (z) {\n" +
             "    break foo\n" +
             "  }\n" +
             "}\n"
   },
   {
     name: "Instanceof",
     input: "var a=x instanceof y;",
     output: "var a = x instanceof y;\n"
   },
   {
     name: "Binary operators",
     input: "var a=5*30;var b=5>>3;",
     output: "var a = 5 * 30;\n" +
             "var b = 5 >> 3;\n"
   },
   {
     name: "Delete",
     input: "delete obj.prop;",
     output: "delete obj.prop;\n"
   },
   {
     name: "Try/catch/finally statement",
     input: "try{dangerous()}catch(e){handle(e)}finally{cleanup()}",
     output: "try {\n" +
             "  dangerous()\n" +
             "} catch (e) {\n" +
             "  handle(e)\n" +
             "} finally {\n" +
             "  cleanup()\n" +
             "}\n"
   },
   {
     name: "If/else statement",
     input: "if(c){then()}else{other()}",
     output: "if (c) {\n" +
             "  then()\n" +
             "} else {\n" +
             "  other()\n" +
             "}\n"
   },
   {
     name: "If/else without curlies",
     input: "if(c) a else b",
     output: "if (c) a else b\n"
   },
   {
     name: "Objects",
     input: "var o={a:1,\n" +
            "       b:2};",
     output: "var o = {\n" +
             "  a: 1,\n" +
             "  b: 2\n" +
             "};\n",
     mappings: [
       // a: 1,
       {
         inputLine: 1,
         outputLine: 2
       },
       // b: 2
       {
         inputLine: 2,
         outputLine: 3
       },
     ]
   },
   {
     name: "Do/while loop",
     input: "do{x}while(y)",
     output: "do {\n" +
             "  x\n" +
             "} while (y)\n"
   },
   {
     name: "Arrays",
     input: "var a=[1,2,3];",
     output: "var a = [\n" +
             "  1,\n" +
             "  2,\n" +
             "  3\n" +
             "];\n"
   },
   {
     name: "Code that relies on ASI",
     input: "var foo = 10\n" +
            "var bar = 20\n" +
            "function g() {\n" +
            "  a()\n" +
            "  b()\n" +
            "}",
     output: "var foo = 10\n" +
             "var bar = 20\n" +
             "function g() {\n" +
             "  a()\n" +
             "  b()\n" +
             "}\n"
   },
   {
     name: "Ternary operator",
     input: "bar?baz:bang;",
     output: "bar ? baz : bang;\n"
   },
   {
     name: "Switch statements",
     input: "switch(x){case a:foo();break;default:bar()}",
     output: "switch (x) {\n" +
             "case a:\n" +
             "  foo();\n" +
             "  break;\n" +
             "default:\n" +
             "  bar()\n" +
             "}\n"
   },
   {
     name: "Multiple single line comments",
     input: "function f() {\n" +
            "  // a\n" +
            "  // b\n" +
            "  // c\n" +
            "}\n",
     output: "function f() {\n" +
             "  // a\n" +
             "  // b\n" +
             "  // c\n" +
             "}\n",
   },
   {
     name: "Indented multiline comment",
     input: "function foo() {\n" +
            "  /**\n" +
            "   * java doc style comment\n" +
            "   * more comment\n" +
            "   */\n" +
            "  bar();\n" +
            "}\n",
     output: "function foo() {\n" +
             "  /**\n" +
             "   * java doc style comment\n" +
             "   * more comment\n" +
             "   */\n" +
             "  bar();\n" +
             "}\n",
   },
   {
     name: "ASI return",
     input: "function f() {\n" +
            "  return\n" +
            "  {}\n" +
            "}\n",
     output: "function f() {\n" +
             "  return\n" +
             "  {\n" +
             "  }\n" +
             "}\n",
   },
   {
     name: "Non-ASI property access",
     input: "[1,2,3]\n" +
            "[0]",
     output: "[\n" +
             "  1,\n" +
             "  2,\n" +
             "  3\n" +
             "]\n" +
             "[0]\n"
   },
   {
     name: "Non-ASI in",
     input: "'x'\n" +
            "in foo",
     output: "'x' in foo\n"
   },
   {
     name: "Non-ASI function call",
     input: "f\n" +
            "()",
     output: "f()\n"
   },
   {
     name: "Non-ASI new",
     input: "new\n" +
            "F()",
     output: "new F()\n"
   },
   {
     name: "Getter and setter literals",
     input: "var obj={get foo(){return this._foo},set foo(v){this._foo=v}}",
     output: "var obj = {\n" +
             "  get foo() {\n" +
             "    return this._foo\n" +
             "  },\n" +
             "  set foo(v) {\n" +
             "    this._foo = v\n" +
             "  }\n" +
             "}\n"
   },
   {
     name: "Escaping backslashes in strings",
     input: "'\\\\'\n",
     output: "'\\\\'\n"
   },
   {
     name: "Escaping carriage return in strings",
     input: "'\\r'\n",
     output: "'\\r'\n"
   },
   {
     name: "Escaping tab in strings",
     input: "'\\t'\n",
     output: "'\\t'\n"
   },
   {
     name: "Escaping vertical tab in strings",
     input: "'\\v'\n",
     output: "'\\v'\n"
   },
   {
     name: "Escaping form feed in strings",
     input: "'\\f'\n",
     output: "'\\f'\n"
   },
   {
     name: "Escaping null character in strings",
     input: "'\\0'\n",
     output: "'\\0'\n"
   },
 ];
 var sourceMap = this.sourceMap || require("source-map");
 function run_test() {
   testCases.forEach(function (test) {
     console.log(test.name);
     var actual = prettyFast(test.input, {
       indent: "  ",
       url: "test.js"
     });
     if (actual.code !== test.output) {
       throw new Error("Expected:\n" + test.output
                       + "\nGot:\n" + actual.code);
     }
     if (test.mappings) {
       var smc = new sourceMap.SourceMapConsumer(actual.map.toJSON());
       test.mappings.forEach(function (m) {
         var query = { line: m.outputLine, column: 0 };
         var original = smc.originalPositionFor(query);
         if (original.line != m.inputLine) {
           throw new Error("Querying:\n" + JSON.stringify(query, null, 2) + "\n"
                           + "Expected line:\n" + m.inputLine + "\n"
                           + "Got:\n" + JSON.stringify(original, null, 2));
         }
       });
     }
   });
   console.log("✓ All tests pass!");
 }
 // Only run the tests if this is node and we are running this file
 // directly. (Firefox's test runner will import this test file, and then call
 // run_test itself.)
 if (typeof require == "function" && typeof module == "object"
     && require.main === module) {
   run_test();
 }