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Parser.test.js
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Parser.test.js
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"use strict";
const should = require("should");
const Parser = require("../lib/Parser");
const BasicEvaluatedExpression = require("../lib/BasicEvaluatedExpression");
describe("Parser", () => {
const testCases = {
"call ident": [
function() {
abc("test");
}, {
abc: ["test"]
}
],
"call member": [
function() {
cde.abc("membertest");
}, {
cdeabc: ["membertest"]
}
],
"call member using bracket notation": [
function() {
cde["abc"]("membertest");
}, {
cdeabc: ["membertest"]
}
],
"call inner member": [
function() {
cde.ddd.abc("inner");
}, {
cdedddabc: ["inner"]
}
],
"call inner member using bracket notation": [
function() {
cde.ddd["abc"]("inner");
}, {
cdedddabc: ["inner"]
}
],
"expression": [
function() {
fgh;
}, {
fgh: [""]
}
],
"expression sub": [
function() {
fgh.sub;
}, {
fghsub: ["notry"]
}
],
"member expression": [
function() {
test[memberExpr]
test[+memberExpr]
}, {
expressions: ["memberExpr", "memberExpr"]
}
],
"in function definition": [
function() {
(function(abc, cde, fgh) {
abc("test");
cde.abc("test");
cde.ddd.abc("test");
fgh;
fgh.sub;
})();
}, {}
],
"const definition": [
function() {
let abc, cde, fgh;
abc("test");
cde.abc("test");
cde.ddd.abc("test");
fgh;
fgh.sub;
}, {}
],
"var definition": [
function() {
var abc, cde, fgh;
abc("test");
cde.abc("test");
cde.ddd.abc("test");
fgh;
fgh.sub;
}, {}
],
"function definition": [
function() {
function abc() {}
function cde() {}
function fgh() {}
abc("test");
cde.abc("test");
cde.ddd.abc("test");
fgh;
fgh.sub;
}, {}
],
"in try": [
function() {
try {
fgh.sub;
fgh;
function test(ttt) {
fgh.sub;
fgh;
}
} catch(e) {
fgh.sub;
fgh;
}
}, {
fghsub: ["try", "notry", "notry"],
fgh: ["test", "test ttt", "test e"]
}
],
"renaming with const": [
function() {
const xyz = abc;
xyz("test");
}, {
abc: ["test"]
}
],
"renaming with var": [
function() {
var xyz = abc;
xyz("test");
}, {
abc: ["test"]
}
],
"renaming with assignment": [
function() {
const xyz = abc;
xyz("test");
}, {
abc: ["test"]
}
],
"renaming with IIFE": [
function() {
! function(xyz) {
xyz("test");
}(abc);
}, {
abc: ["test"]
}
],
"renaming arguments with IIFE (called)": [
function() {
! function(xyz) {
xyz("test");
}.call(fgh, abc);
}, {
abc: ["test"],
fgh: [""]
}
],
"renaming this's properties with IIFE (called)": [
function() {
! function() {
this.sub;
}.call(ijk);
}, {
ijksub: ["test"]
}
],
};
Object.keys(testCases).forEach((name) => {
it("should parse " + name, () => {
let source = testCases[name][0].toString();
source = source.substr(13, source.length - 14).trim();
const state = testCases[name][1];
const testParser = new Parser({});
testParser.plugin("can-rename abc", (expr) => true);
testParser.plugin("can-rename ijk", (expr) => true);
testParser.plugin("call abc", (expr) => {
if(!testParser.state.abc) testParser.state.abc = [];
testParser.state.abc.push(testParser.parseString(expr.arguments[0]));
return true;
});
testParser.plugin("call cde.abc", (expr) => {
if(!testParser.state.cdeabc) testParser.state.cdeabc = [];
testParser.state.cdeabc.push(testParser.parseString(expr.arguments[0]));
return true;
});
testParser.plugin("call cde.ddd.abc", (expr) => {
if(!testParser.state.cdedddabc) testParser.state.cdedddabc = [];
testParser.state.cdedddabc.push(testParser.parseString(expr.arguments[0]));
return true;
});
testParser.plugin("expression fgh", (expr) => {
if(!testParser.state.fgh) testParser.state.fgh = [];
testParser.state.fgh.push(testParser.scope.definitions.join(" "));
return true;
});
testParser.plugin("expression fgh.sub", (expr) => {
if(!testParser.state.fghsub) testParser.state.fghsub = [];
testParser.state.fghsub.push(testParser.scope.inTry ? "try" : "notry");
return true;
});
testParser.plugin("expression ijk.sub", (expr) => {
if(!testParser.state.ijksub) testParser.state.ijksub = [];
testParser.state.ijksub.push("test");
return true;
});
testParser.plugin("expression memberExpr", (expr) => {
if(!testParser.state.expressions) testParser.state.expressions = [];
testParser.state.expressions.push(expr.name);
return true;
});
const actual = testParser.parse(source);
should.strictEqual(typeof actual, "object");
actual.should.be.eql(state);
});
});
it("should parse comments", () => {
const source = "//comment1\n/*comment2*/";
const state = [{
type: "Line",
value: "comment1"
}, {
type: "Block",
value: "comment2"
}];
const testParser = new Parser({});
testParser.plugin("program", (ast, comments) => {
if(!testParser.state.comments) testParser.state.comments = comments;
return true;
});
const actual = testParser.parse(source);
should.strictEqual(typeof actual, "object");
should.strictEqual(typeof actual.comments, "object");
actual.comments.forEach((element, index) => {
should.strictEqual(typeof element.type, "string");
should.strictEqual(typeof element.value, "string");
element.type.should.be.eql(state[index].type);
element.value.should.be.eql(state[index].value);
});
});
describe("expression evaluation", () => {
function evaluateInParser(source) {
const parser = new Parser();
parser.plugin("call test", (expr) => {
parser.state.result = parser.evaluateExpression(expr.arguments[0]);
});
parser.plugin("evaluate Identifier aString", (expr) =>
new BasicEvaluatedExpression().setString("aString").setRange(expr.range));
parser.plugin("evaluate Identifier b.Number", (expr) =>
new BasicEvaluatedExpression().setNumber(123).setRange(expr.range));
return parser.parse("test(" + source + ");").result;
}
const testCases = {
"\"strrring\"": "string=strrring",
"\"strr\" + \"ring\"": "string=strrring",
"\"s\" + (\"trr\" + \"rin\") + \"g\"": "string=strrring",
"'S' + (\"strr\" + \"ring\") + 'y'": "string=Sstrrringy",
"/abc/": "regExp=/abc/",
"1": "number=1",
"1 + 3": "number=4",
"3 - 1": "number=2",
"1 == 1": "bool=true",
"1 === 1": "bool=true",
"3 != 1": "bool=true",
"3 !== 1": "bool=true",
"3 == 1": "bool=false",
"3 === 1": "bool=false",
"1 != 1": "bool=false",
"1 !== 1": "bool=false",
"true === false": "bool=false",
"false !== false": "bool=false",
"true == true": "bool=true",
"false != true": "bool=true",
"!'a'": "bool=false",
"!''": "bool=true",
"'pre' + a": "wrapped=['pre' string=pre]+[null]",
"a + 'post'": "wrapped=[null]+['post' string=post]",
"'pre' + a + 'post'": "wrapped=['pre' string=pre]+['post' string=post]",
"1 + a + 2": "",
"1 + a + 'post'": "wrapped=[null]+['post' string=post]",
"'' + 1 + a + 2": "wrapped=['' + 1 string=1]+[2 string=2]",
"'' + 1 + a + 2 + 3": "wrapped=['' + 1 string=1]+[2 + 3 string=23]",
"'' + 1 + a + (2 + 3)": "wrapped=['' + 1 string=1]+[2 + 3 string=5]",
"'pre' + (1 + a) + (2 + 3)": "wrapped=['pre' string=pre]+[2 + 3 string=5]",
"a ? 'o1' : 'o2'": "options=['o1' string=o1],['o2' string=o2]",
"a ? 'o1' : b ? 'o2' : 'o3'": "options=['o1' string=o1],['o2' string=o2],['o3' string=o3]",
"a ? (b ? 'o1' : 'o2') : 'o3'": "options=['o1' string=o1],['o2' string=o2],['o3' string=o3]",
"a ? (b ? 'o1' : 'o2') : c ? 'o3' : 'o4'": "options=['o1' string=o1],['o2' string=o2],['o3' string=o3],['o4' string=o4]",
"a ? 'o1' : b ? 'o2' : c ? 'o3' : 'o4'": "options=['o1' string=o1],['o2' string=o2],['o3' string=o3],['o4' string=o4]",
"a ? 'o1' : b ? b : c ? 'o3' : c": "options=['o1' string=o1],[b],['o3' string=o3],[c]",
"['i1', 'i2', 3, a, b ? 4 : 5]": "items=['i1' string=i1],['i2' string=i2],[3 number=3],[a],[b ? 4 : 5 options=[4 number=4],[5 number=5]]",
"typeof 'str'": "string=string",
"typeof aString": "string=string",
"typeof b.Number": "string=number",
"typeof b['Number']": "string=number",
"typeof b[Number]": "",
"b.Number": "number=123",
"b['Number']": "number=123",
"b[Number]": "",
"'abc'.substr(1)": "string=bc",
"'abcdef'.substr(2, 3)": "string=cde",
"'abcdef'.substring(2, 3)": "string=c",
"'abcdef'.substring(2, 3, 4)": "",
"'abc'[\"substr\"](1)": "string=bc",
"'abc'[substr](1)": "",
"'1,2+3'.split(/[,+]/)": "array=[1],[2],[3]",
"'1,2+3'.split(expr)": "",
"'a' + (expr + 'c')": "wrapped=['a' string=a]+['c' string=c]",
"1 + 'a'": "string=1a",
"'a' + 1": "string=a1",
"'a' + expr + 1": "wrapped=['a' string=a]+[1 string=1]",
};
Object.keys(testCases).forEach((key) => {
function evalExprToString(evalExpr) {
if(!evalExpr) {
return "null";
} else {
const result = [];
if(evalExpr.isString()) result.push("string=" + evalExpr.string);
if(evalExpr.isNumber()) result.push("number=" + evalExpr.number);
if(evalExpr.isBoolean()) result.push("bool=" + evalExpr.bool);
if(evalExpr.isRegExp()) result.push("regExp=" + evalExpr.regExp);
if(evalExpr.isConditional()) result.push("options=[" + evalExpr.options.map(evalExprToString).join("],[") + "]");
if(evalExpr.isArray()) result.push("items=[" + evalExpr.items.map(evalExprToString).join("],[") + "]");
if(evalExpr.isConstArray()) result.push("array=[" + evalExpr.array.join("],[") + "]");
if(evalExpr.isWrapped()) result.push("wrapped=[" + evalExprToString(evalExpr.prefix) + "]+[" + evalExprToString(evalExpr.postfix) + "]");
if(evalExpr.range) {
const start = evalExpr.range[0] - 5;
const end = evalExpr.range[1] - 5;
return key.substr(start, end - start) + (result.length > 0 ? " " + result.join(" ") : "");
}
return result.join(" ");
}
}
it("should eval " + key, () => {
const evalExpr = evaluateInParser(key);
evalExprToString(evalExpr).should.be.eql(testCases[key] ? key + " " + testCases[key] : key);
});
});
});
describe("async/await support", () => {
describe("should accept", () => {
const cases = {
"async function": "async function x() {}",
"async arrow function": "async () => {}",
"await expression": "async function x(y) { await y }"
};
const parser = new Parser();
Object.keys(cases).forEach((name) => {
const expr = cases[name];
it(name, () => {
const actual = parser.parse(expr);
should.strictEqual(typeof actual, "object");
});
});
});
describe("should parse await", () => {
const cases = {
"require": [
"async function x() { await require('y'); }", {
param: "y"
}
],
"System.import": [
"async function x() { const y = await System.import('z'); }", {
param: "z"
}
]
};
const parser = new Parser();
parser.plugin("call require", (expr) => {
const param = parser.evaluateExpression(expr.arguments[0]);
parser.state.param = param.string;
});
parser.plugin("call System.import", (expr) => {
const param = parser.evaluateExpression(expr.arguments[0]);
parser.state.param = param.string;
});
Object.keys(cases).forEach((name) => {
it(name, () => {
const actual = parser.parse(cases[name][0]);
actual.should.be.eql(cases[name][1]);
});
});
});
});
});