1b20aa5427
This commit ensures that all modules outside 'lib' are importing 'lib/peg.js' so that VS Code automatically gets 'lib/peg.d.ts'. An alias module for 'lib/peg.js' called 'pegjs-dev' was made for test files at 'test/node_modules/pegjs-dev.js'
108 lines
3.7 KiB
JavaScript
108 lines
3.7 KiB
JavaScript
"use strict";
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const chai = require( "chai" );
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const helpers = require( "./helpers" );
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const pass = require( "pegjs-dev" ).compiler.passes.check.reportInfiniteRepetition;
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chai.use( helpers );
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const expect = chai.expect;
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describe( "compiler pass |reportInfiniteRepetition|", function () {
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it( "reports infinite loops for zero_or_more", function () {
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expect( pass ).to.reportError( "start = ('')*", {
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message: "Possible infinite loop when parsing (repetition used with an expression that may not consume any input).",
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location: {
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start: { offset: 8, line: 1, column: 9 },
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end: { offset: 13, line: 1, column: 14 }
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}
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} );
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} );
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it( "reports infinite loops for one_or_more", function () {
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expect( pass ).to.reportError( "start = ('')+", {
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message: "Possible infinite loop when parsing (repetition used with an expression that may not consume any input).",
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location: {
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start: { offset: 8, line: 1, column: 9 },
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end: { offset: 13, line: 1, column: 14 }
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}
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} );
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} );
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it( "computes expressions that always consume input on success correctly", function () {
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expect( pass ).to.reportError( [
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"start = a*",
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"a 'a' = ''"
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].join( "\n" ) );
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expect( pass ).to.not.reportError( [
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"start = a*",
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"a 'a' = 'a'"
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].join( "\n" ) );
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expect( pass ).to.reportError( "start = ('' / 'a' / 'b')*" );
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expect( pass ).to.reportError( "start = ('a' / '' / 'b')*" );
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expect( pass ).to.reportError( "start = ('a' / 'b' / '')*" );
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expect( pass ).to.not.reportError( "start = ('a' / 'b' / 'c')*" );
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expect( pass ).to.reportError( "start = ('' { })*" );
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expect( pass ).to.not.reportError( "start = ('a' { })*" );
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expect( pass ).to.reportError( "start = ('' '' '')*" );
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expect( pass ).to.not.reportError( "start = ('a' '' '')*" );
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expect( pass ).to.not.reportError( "start = ('' 'a' '')*" );
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expect( pass ).to.not.reportError( "start = ('' '' 'a')*" );
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expect( pass ).to.reportError( "start = (a:'')*" );
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expect( pass ).to.not.reportError( "start = (a:'a')*" );
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expect( pass ).to.reportError( "start = ($'')*" );
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expect( pass ).to.not.reportError( "start = ($'a')*" );
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expect( pass ).to.reportError( "start = (&'')*" );
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expect( pass ).to.reportError( "start = (&'a')*" );
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expect( pass ).to.reportError( "start = (!'')*" );
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expect( pass ).to.reportError( "start = (!'a')*" );
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expect( pass ).to.reportError( "start = (''?)*" );
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expect( pass ).to.reportError( "start = ('a'?)*" );
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expect( pass ).to.reportError( "start = (''*)*" );
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expect( pass ).to.reportError( "start = ('a'*)*" );
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expect( pass ).to.reportError( "start = (''+)*" );
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expect( pass ).to.not.reportError( "start = ('a'+)*" );
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expect( pass ).to.reportError( "start = ('')*" );
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expect( pass ).to.not.reportError( "start = ('a')*" );
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expect( pass ).to.reportError( "start = (&{ })*" );
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expect( pass ).to.reportError( "start = (!{ })*" );
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expect( pass ).to.reportError( [
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"start = a*",
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"a = ''"
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].join( "\n" ) );
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expect( pass ).to.not.reportError( [
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"start = a*",
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"a = 'a'"
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].join( "\n" ) );
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expect( pass ).to.reportError( "start = ''*" );
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expect( pass ).to.not.reportError( "start = 'a'*" );
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expect( pass ).to.not.reportError( "start = [a-d]*" );
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expect( pass ).to.not.reportError( "start = .*" );
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} );
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} );
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