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677 lines
24 KiB
JavaScript
677 lines
24 KiB
JavaScript
"use strict";
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let peg = require("../../lib/peg");
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describe("PEG.js grammar parser", function() {
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let literalAbcd = { type: "literal", value: "abcd", ignoreCase: false },
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literalEfgh = { type: "literal", value: "efgh", ignoreCase: false },
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literalIjkl = { type: "literal", value: "ijkl", ignoreCase: false },
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literalMnop = { type: "literal", value: "mnop", ignoreCase: false },
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semanticAnd = { type: "semantic_and", code: " code " },
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semanticNot = { type: "semantic_not", code: " code " },
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optional = { type: "optional", expression: literalAbcd },
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zeroOrMore = { type: "zero_or_more", expression: literalAbcd },
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oneOrMore = { type: "one_or_more", expression: literalAbcd },
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textOptional = { type: "text", expression: optional },
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simpleNotAbcd = { type: "simple_not", expression: literalAbcd },
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simpleAndOptional = { type: "simple_and", expression: optional },
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simpleNotOptional = { type: "simple_not", expression: optional },
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labeledAbcd = { type: "labeled", label: "a", expression: literalAbcd },
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labeledEfgh = { type: "labeled", label: "b", expression: literalEfgh },
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labeledIjkl = { type: "labeled", label: "c", expression: literalIjkl },
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labeledMnop = { type: "labeled", label: "d", expression: literalMnop },
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labeledSimpleNot = { type: "labeled", label: "a", expression: simpleNotAbcd },
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sequence = {
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type: "sequence",
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elements: [literalAbcd, literalEfgh, literalIjkl]
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},
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sequence2 = {
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type: "sequence",
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elements: [labeledAbcd, labeledEfgh]
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},
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sequence4 = {
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type: "sequence",
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elements: [labeledAbcd, labeledEfgh, labeledIjkl, labeledMnop]
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},
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groupLabeled = { type: "group", expression: labeledAbcd },
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groupSequence = { type: "group", expression: sequence },
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actionAbcd = { type: "action", expression: literalAbcd, code: " code " },
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actionEfgh = { type: "action", expression: literalEfgh, code: " code " },
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actionIjkl = { type: "action", expression: literalIjkl, code: " code " },
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actionMnop = { type: "action", expression: literalMnop, code: " code " },
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actionSequence = { type: "action", expression: sequence, code: " code " },
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choice = {
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type: "choice",
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alternatives: [literalAbcd, literalEfgh, literalIjkl]
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},
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choice2 = {
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type: "choice",
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alternatives: [actionAbcd, actionEfgh]
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},
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choice4 = {
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type: "choice",
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alternatives: [actionAbcd, actionEfgh, actionIjkl, actionMnop]
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},
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named = { type: "named", name: "start rule", expression: literalAbcd },
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ruleA = { type: "rule", name: "a", expression: literalAbcd },
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ruleB = { type: "rule", name: "b", expression: literalEfgh },
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ruleC = { type: "rule", name: "c", expression: literalIjkl },
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ruleStart = { type: "rule", name: "start", expression: literalAbcd },
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initializer = { type: "initializer", code: " code " };
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function oneRuleGrammar(expression) {
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return {
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type: "grammar",
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initializer: null,
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rules: [{ type: "rule", name: "start", expression: expression }]
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};
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}
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function actionGrammar(code) {
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return oneRuleGrammar(
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{ type: "action", expression: literalAbcd, code: code }
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);
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}
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function literalGrammar(value, ignoreCase) {
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return oneRuleGrammar(
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{ type: "literal", value: value, ignoreCase: ignoreCase }
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);
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}
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function classGrammar(parts, inverted, ignoreCase) {
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return oneRuleGrammar({
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type: "class",
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parts: parts,
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inverted: inverted,
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ignoreCase: ignoreCase
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});
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}
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function anyGrammar() {
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return oneRuleGrammar({ type: "any" });
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}
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function ruleRefGrammar(name) {
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return oneRuleGrammar({ type: "rule_ref", name: name });
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}
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let trivialGrammar = literalGrammar("abcd", false),
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twoRuleGrammar = {
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type: "grammar",
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initializer: null,
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rules: [ruleA, ruleB]
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};
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let stripLocation = (function() {
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function buildVisitor(functions) {
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return function(node) {
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return functions[node.type].apply(null, arguments);
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};
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}
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function stripLeaf(node) {
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delete node.location;
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}
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function stripExpression(node) {
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delete node.location;
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strip(node.expression);
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}
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function stripChildren(property) {
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return function(node) {
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delete node.location;
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node[property].forEach(strip);
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};
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}
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let strip = buildVisitor({
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grammar: function(node) {
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delete node.location;
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if (node.initializer) {
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strip(node.initializer);
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}
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node.rules.forEach(strip);
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},
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initializer: stripLeaf,
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rule: stripExpression,
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named: stripExpression,
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choice: stripChildren("alternatives"),
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action: stripExpression,
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sequence: stripChildren("elements"),
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labeled: stripExpression,
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text: stripExpression,
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simple_and: stripExpression,
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simple_not: stripExpression,
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optional: stripExpression,
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zero_or_more: stripExpression,
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one_or_more: stripExpression,
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group: stripExpression,
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semantic_and: stripLeaf,
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semantic_not: stripLeaf,
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rule_ref: stripLeaf,
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literal: stripLeaf,
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"class": stripLeaf,
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any: stripLeaf
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});
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return strip;
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})();
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beforeEach(function() {
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this.addMatchers({
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toParseAs: function(expected) {
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let result;
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try {
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result = peg.parser.parse(this.actual);
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} catch (e) {
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this.message = () =>
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"Expected " + jasmine.pp(this.actual) + " "
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+ "to parse as " + jasmine.pp(expected) + ", "
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+ "but it failed to parse with message "
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+ jasmine.pp(e.message) + ".";
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return false;
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}
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stripLocation(result);
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this.message = () =>
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"Expected " + jasmine.pp(this.actual) + " "
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+ (this.isNot ? "not " : "")
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+ "to parse as " + jasmine.pp(expected) + ", "
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+ "but it parsed as " + jasmine.pp(result) + ".";
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return this.env.equals_(result, expected);
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},
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toFailToParse: function(details) {
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let result;
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try {
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result = peg.parser.parse(this.actual);
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} catch (e) {
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if (this.isNot) {
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this.message = () =>
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"Expected " + jasmine.pp(this.actual) + " to parse, "
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+ "but it failed with message "
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+ jasmine.pp(e.message) + ".";
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} else {
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if (details) {
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for (let key in details) {
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if (details.hasOwnProperty(key)) {
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if (!this.env.equals_(e[key], details[key])) {
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this.message = () =>
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"Expected " + jasmine.pp(this.actual) + " to fail to parse"
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+ (details ? " with details " + jasmine.pp(details) : "") + ", "
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+ "but " + jasmine.pp(key) + " "
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+ "is " + jasmine.pp(e[key]) + ".";
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return false;
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}
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}
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}
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}
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}
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return true;
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}
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stripLocation(result);
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this.message = () =>
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"Expected " + jasmine.pp(this.actual) + " to fail to parse"
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+ (details ? " with details " + jasmine.pp(details) : "") + ", "
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+ "but it parsed as " + jasmine.pp(result) + ".";
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return false;
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}
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});
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});
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/* Canonical Grammar is "a = \"abcd\"; b = \"efgh\"; c = \"ijkl\";". */
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it("parses Grammar", function() {
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expect('\na = "abcd";\n').toParseAs(
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{ type: "grammar", initializer: null, rules: [ruleA] }
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);
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expect('\na = "abcd";\nb = "efgh";\nc = "ijkl";\n').toParseAs(
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{ type: "grammar", initializer: null, rules: [ruleA, ruleB, ruleC] }
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);
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expect('\n{ code };\na = "abcd";\n').toParseAs(
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{ type: "grammar", initializer: initializer, rules: [ruleA] }
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);
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});
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/* Canonical Initializer is "{ code }". */
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it("parses Initializer", function() {
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expect('{ code };start = "abcd"').toParseAs(
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{ type: "grammar", initializer: initializer, rules: [ruleStart] }
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);
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});
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/* Canonical Rule is "a = \"abcd\";". */
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it("parses Rule", function() {
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expect('start\n=\n"abcd";').toParseAs(
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oneRuleGrammar(literalAbcd)
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);
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expect('start\n"start rule"\n=\n"abcd";').toParseAs(
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oneRuleGrammar(named)
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);
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});
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/* Canonical Expression is "\"abcd\"". */
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it("parses Expression", function() {
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expect('start = "abcd" / "efgh" / "ijkl"').toParseAs(
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oneRuleGrammar(choice)
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);
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});
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/* Canonical ChoiceExpression is "\"abcd\" / \"efgh\" / \"ijkl\"". */
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it("parses ChoiceExpression", function() {
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expect('start = "abcd" { code }').toParseAs(
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oneRuleGrammar(actionAbcd)
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);
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expect('start = "abcd" { code }\n/\n"efgh" { code }').toParseAs(
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oneRuleGrammar(choice2)
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);
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expect(
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'start = "abcd" { code }\n/\n"efgh" { code }\n/\n"ijkl" { code }\n/\n"mnop" { code }'
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).toParseAs(
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oneRuleGrammar(choice4)
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);
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});
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/* Canonical ActionExpression is "\"abcd\" { code }". */
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it("parses ActionExpression", function() {
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expect('start = "abcd" "efgh" "ijkl"').toParseAs(
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oneRuleGrammar(sequence)
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);
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expect('start = "abcd" "efgh" "ijkl"\n{ code }').toParseAs(
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oneRuleGrammar(actionSequence)
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);
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});
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/* Canonical SequenceExpression is "\"abcd\" \"efgh\" \"ijkl\"". */
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it("parses SequenceExpression", function() {
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expect('start = a:"abcd"').toParseAs(
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oneRuleGrammar(labeledAbcd)
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);
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expect('start = a:"abcd"\nb:"efgh"').toParseAs(
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oneRuleGrammar(sequence2)
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);
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expect('start = a:"abcd"\nb:"efgh"\nc:"ijkl"\nd:"mnop"').toParseAs(
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oneRuleGrammar(sequence4)
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);
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});
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/* Canonical LabeledExpression is "a:\"abcd\"". */
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it("parses LabeledExpression", function() {
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expect('start = a\n:\n!"abcd"').toParseAs(oneRuleGrammar(labeledSimpleNot));
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expect('start = !"abcd"' ).toParseAs(oneRuleGrammar(simpleNotAbcd));
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});
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/* Canonical PrefixedExpression is "!\"abcd\"". */
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it("parses PrefixedExpression", function() {
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expect('start = !\n"abcd"?' ).toParseAs(oneRuleGrammar(simpleNotOptional));
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expect('start = "abcd"?' ).toParseAs(oneRuleGrammar(optional));
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});
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/* Canonical PrefixedOperator is "!". */
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it("parses PrefixedOperator", function() {
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expect('start = $"abcd"?').toParseAs(oneRuleGrammar(textOptional));
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expect('start = &"abcd"?').toParseAs(oneRuleGrammar(simpleAndOptional));
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expect('start = !"abcd"?').toParseAs(oneRuleGrammar(simpleNotOptional));
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});
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/* Canonical SuffixedExpression is "\"ebcd\"?". */
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it("parses SuffixedExpression", function() {
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expect('start = "abcd"\n?').toParseAs(oneRuleGrammar(optional));
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expect('start = "abcd"' ).toParseAs(oneRuleGrammar(literalAbcd));
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});
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/* Canonical SuffixedOperator is "?". */
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it("parses SuffixedOperator", function() {
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expect('start = "abcd"?').toParseAs(oneRuleGrammar(optional));
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expect('start = "abcd"*').toParseAs(oneRuleGrammar(zeroOrMore));
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expect('start = "abcd"+').toParseAs(oneRuleGrammar(oneOrMore));
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});
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/* Canonical PrimaryExpression is "\"abcd\"". */
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it("parses PrimaryExpression", function() {
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expect('start = "abcd"' ).toParseAs(trivialGrammar);
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expect('start = [a-d]' ).toParseAs(classGrammar([["a", "d"]], false, false));
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expect('start = .' ).toParseAs(anyGrammar());
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expect('start = a' ).toParseAs(ruleRefGrammar("a"));
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expect('start = &{ code }').toParseAs(oneRuleGrammar(semanticAnd));
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expect('start = (\na:"abcd"\n)' ).toParseAs(oneRuleGrammar(groupLabeled));
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expect('start = (\n"abcd" "efgh" "ijkl"\n)').toParseAs(oneRuleGrammar(groupSequence));
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expect('start = (\n"abcd"\n)' ).toParseAs(trivialGrammar);
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});
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/* Canonical RuleReferenceExpression is "a". */
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it("parses RuleReferenceExpression", function() {
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expect('start = a').toParseAs(ruleRefGrammar("a"));
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expect('start = a\n=' ).toFailToParse();
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expect('start = a\n"abcd"\n=').toFailToParse();
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});
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/* Canonical SemanticPredicateExpression is "!{ code }". */
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it("parses SemanticPredicateExpression", function() {
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expect('start = !\n{ code }').toParseAs(oneRuleGrammar(semanticNot));
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});
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/* Canonical SemanticPredicateOperator is "!". */
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it("parses SemanticPredicateOperator", function() {
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expect('start = &{ code }').toParseAs(oneRuleGrammar(semanticAnd));
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expect('start = !{ code }').toParseAs(oneRuleGrammar(semanticNot));
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});
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/* The SourceCharacter rule is not tested. */
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/* Canonical WhiteSpace is " ". */
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it("parses WhiteSpace", function() {
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expect('start =\t"abcd"' ).toParseAs(trivialGrammar);
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expect('start =\v"abcd"' ).toParseAs(trivialGrammar);
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expect('start =\f"abcd"' ).toParseAs(trivialGrammar);
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expect('start = "abcd"' ).toParseAs(trivialGrammar);
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expect('start =\u00A0"abcd"').toParseAs(trivialGrammar);
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expect('start =\uFEFF"abcd"').toParseAs(trivialGrammar);
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expect('start =\u1680"abcd"').toParseAs(trivialGrammar);
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});
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/* Canonical LineTerminator is "\n". */
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it("parses LineTerminator", function() {
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expect('start = "\n"' ).toFailToParse();
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expect('start = "\r"' ).toFailToParse();
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expect('start = "\u2028"').toFailToParse();
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expect('start = "\u2029"').toFailToParse();
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});
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/* Canonical LineTerminatorSequence is "\r\n". */
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it("parses LineTerminatorSequence", function() {
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expect('start =\n"abcd"' ).toParseAs(trivialGrammar);
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expect('start =\r\n"abcd"' ).toParseAs(trivialGrammar);
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expect('start =\r"abcd"' ).toParseAs(trivialGrammar);
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expect('start =\u2028"abcd"').toParseAs(trivialGrammar);
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expect('start =\u2029"abcd"').toParseAs(trivialGrammar);
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});
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// Canonical Comment is "/* comment */".
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it("parses Comment", function() {
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expect('start =// comment\n"abcd"' ).toParseAs(trivialGrammar);
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expect('start =/* comment */"abcd"').toParseAs(trivialGrammar);
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});
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// Canonical MultiLineComment is "/* comment */".
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it("parses MultiLineComment", function() {
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expect('start =/**/"abcd"' ).toParseAs(trivialGrammar);
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expect('start =/*a*/"abcd"' ).toParseAs(trivialGrammar);
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expect('start =/*abc*/"abcd"').toParseAs(trivialGrammar);
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expect('start =/**/*/"abcd"').toFailToParse();
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});
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// Canonical MultiLineCommentNoLineTerminator is "/* comment */".
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it("parses MultiLineCommentNoLineTerminator", function() {
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expect('a = "abcd"/**/\r\nb = "efgh"' ).toParseAs(twoRuleGrammar);
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expect('a = "abcd"/*a*/\r\nb = "efgh"' ).toParseAs(twoRuleGrammar);
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expect('a = "abcd"/*abc*/\r\nb = "efgh"').toParseAs(twoRuleGrammar);
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expect('a = "abcd"/**/*/\r\nb = "efgh"').toFailToParse();
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expect('a = "abcd"/*\n*/\r\nb = "efgh"').toFailToParse();
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});
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/* Canonical SingleLineComment is "// comment". */
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it("parses SingleLineComment", function() {
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expect('start =//\n"abcd"' ).toParseAs(trivialGrammar);
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expect('start =//a\n"abcd"' ).toParseAs(trivialGrammar);
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expect('start =//abc\n"abcd"').toParseAs(trivialGrammar);
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expect('start =//\n@\n"abcd"').toFailToParse();
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});
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/* Canonical Identifier is "a". */
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it("parses Identifier", function() {
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expect('start = a:"abcd"').toParseAs(oneRuleGrammar(labeledAbcd));
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});
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/* Canonical IdentifierName is "a". */
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it("parses IdentifierName", function() {
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expect('start = a' ).toParseAs(ruleRefGrammar("a"));
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expect('start = ab' ).toParseAs(ruleRefGrammar("ab"));
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expect('start = abcd').toParseAs(ruleRefGrammar("abcd"));
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});
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/* Canonical IdentifierStart is "a". */
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it("parses IdentifierStart", function() {
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expect('start = a' ).toParseAs(ruleRefGrammar("a"));
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expect('start = $' ).toParseAs(ruleRefGrammar("$"));
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expect('start = _' ).toParseAs(ruleRefGrammar("_"));
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expect('start = \\u0061').toParseAs(ruleRefGrammar("a"));
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});
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/* Canonical IdentifierPart is "a". */
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it("parses IdentifierPart", function() {
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expect('start = aa' ).toParseAs(ruleRefGrammar("aa"));
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expect('start = a\u0300').toParseAs(ruleRefGrammar("a\u0300"));
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expect('start = a0' ).toParseAs(ruleRefGrammar("a0"));
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expect('start = a\u203F').toParseAs(ruleRefGrammar("a\u203F"));
|
|
expect('start = a\u200C').toParseAs(ruleRefGrammar("a\u200C"));
|
|
expect('start = a\u200D').toParseAs(ruleRefGrammar("a\u200D"));
|
|
});
|
|
|
|
/* Unicode rules and reserved word rules are not tested. */
|
|
|
|
/* Canonical LiteralMatcher is "\"abcd\"". */
|
|
it("parses LiteralMatcher", function() {
|
|
expect('start = "abcd"' ).toParseAs(literalGrammar("abcd", false));
|
|
expect('start = "abcd"i').toParseAs(literalGrammar("abcd", true));
|
|
});
|
|
|
|
/* Canonical StringLiteral is "\"abcd\"". */
|
|
it("parses StringLiteral", function() {
|
|
expect('start = ""' ).toParseAs(literalGrammar("", false));
|
|
expect('start = "a"' ).toParseAs(literalGrammar("a", false));
|
|
expect('start = "abc"').toParseAs(literalGrammar("abc", false));
|
|
|
|
expect("start = ''" ).toParseAs(literalGrammar("", false));
|
|
expect("start = 'a'" ).toParseAs(literalGrammar("a", false));
|
|
expect("start = 'abc'").toParseAs(literalGrammar("abc", false));
|
|
});
|
|
|
|
/* Canonical DoubleStringCharacter is "a". */
|
|
it("parses DoubleStringCharacter", function() {
|
|
expect('start = "a"' ).toParseAs(literalGrammar("a", false));
|
|
expect('start = "\\n"' ).toParseAs(literalGrammar("\n", false));
|
|
expect('start = "\\\n"').toParseAs(literalGrammar("", false));
|
|
|
|
expect('start = """' ).toFailToParse();
|
|
expect('start = "\\"').toFailToParse();
|
|
expect('start = "\n"').toFailToParse();
|
|
});
|
|
|
|
/* Canonical SingleStringCharacter is "a". */
|
|
it("parses SingleStringCharacter", function() {
|
|
expect("start = 'a'" ).toParseAs(literalGrammar("a", false));
|
|
expect("start = '\\n'" ).toParseAs(literalGrammar("\n", false));
|
|
expect("start = '\\\n'").toParseAs(literalGrammar("", false));
|
|
|
|
expect("start = '''" ).toFailToParse();
|
|
expect("start = '\\'").toFailToParse();
|
|
expect("start = '\n'").toFailToParse();
|
|
});
|
|
|
|
/* Canonical CharacterClassMatcher is "[a-d]". */
|
|
it("parses CharacterClassMatcher", function() {
|
|
expect('start = []').toParseAs(
|
|
classGrammar([], false, false)
|
|
);
|
|
expect('start = [a-d]').toParseAs(
|
|
classGrammar([["a", "d"]], false, false)
|
|
);
|
|
expect('start = [a]').toParseAs(
|
|
classGrammar(["a"], false, false)
|
|
);
|
|
expect('start = [a-de-hi-l]').toParseAs(
|
|
classGrammar(
|
|
[["a", "d"], ["e", "h"], ["i", "l"]],
|
|
false,
|
|
false
|
|
)
|
|
);
|
|
expect('start = [^a-d]').toParseAs(
|
|
classGrammar([["a", "d"]], true, false)
|
|
);
|
|
expect('start = [a-d]i').toParseAs(
|
|
classGrammar([["a", "d"]], false, true)
|
|
);
|
|
|
|
expect('start = [\\\n]').toParseAs(
|
|
classGrammar([], false, false)
|
|
);
|
|
});
|
|
|
|
/* Canonical ClassCharacterRange is "a-d". */
|
|
it("parses ClassCharacterRange", function() {
|
|
expect('start = [a-d]').toParseAs(classGrammar([["a", "d"]], false, false));
|
|
|
|
expect('start = [a-a]').toParseAs(classGrammar([["a", "a"]], false, false));
|
|
expect('start = [b-a]').toFailToParse({
|
|
message: "Invalid character range: b-a."
|
|
});
|
|
});
|
|
|
|
/* Canonical ClassCharacter is "a". */
|
|
it("parses ClassCharacter", function() {
|
|
expect('start = [a]' ).toParseAs(classGrammar(["a"], false, false));
|
|
expect('start = [\\n]' ).toParseAs(classGrammar(["\n"], false, false));
|
|
expect('start = [\\\n]').toParseAs(classGrammar([], false, false));
|
|
|
|
expect('start = []]' ).toFailToParse();
|
|
expect('start = [\\]').toFailToParse();
|
|
expect('start = [\n]').toFailToParse();
|
|
});
|
|
|
|
/* Canonical LineContinuation is "\\\n". */
|
|
it("parses LineContinuation", function() {
|
|
expect('start = "\\\r\n"').toParseAs(literalGrammar("", false));
|
|
});
|
|
|
|
/* Canonical EscapeSequence is "n". */
|
|
it("parses EscapeSequence", function() {
|
|
expect('start = "\\n"' ).toParseAs(literalGrammar("\n", false));
|
|
expect('start = "\\0"' ).toParseAs(literalGrammar("\x00", false));
|
|
expect('start = "\\xFF"' ).toParseAs(literalGrammar("\xFF", false));
|
|
expect('start = "\\uFFFF"').toParseAs(literalGrammar("\uFFFF", false));
|
|
|
|
expect('start = "\\09"').toFailToParse();
|
|
});
|
|
|
|
/* Canonical CharacterEscapeSequence is "n". */
|
|
it("parses CharacterEscapeSequence", function() {
|
|
expect('start = "\\n"').toParseAs(literalGrammar("\n", false));
|
|
expect('start = "\\a"').toParseAs(literalGrammar("a", false));
|
|
});
|
|
|
|
/* Canonical SingleEscapeCharacter is "n". */
|
|
it("parses SingleEscapeCharacter", function() {
|
|
expect('start = "\\\'"').toParseAs(literalGrammar("'", false));
|
|
expect('start = "\\""' ).toParseAs(literalGrammar('"', false));
|
|
expect('start = "\\\\"').toParseAs(literalGrammar("\\", false));
|
|
expect('start = "\\b"' ).toParseAs(literalGrammar("\b", false));
|
|
expect('start = "\\f"' ).toParseAs(literalGrammar("\f", false));
|
|
expect('start = "\\n"' ).toParseAs(literalGrammar("\n", false));
|
|
expect('start = "\\r"' ).toParseAs(literalGrammar("\r", false));
|
|
expect('start = "\\t"' ).toParseAs(literalGrammar("\t", false));
|
|
expect('start = "\\v"' ).toParseAs(literalGrammar("\v", false));
|
|
});
|
|
|
|
/* Canonical NonEscapeCharacter is "a". */
|
|
it("parses NonEscapeCharacter", function() {
|
|
expect('start = "\\a"').toParseAs(literalGrammar("a", false));
|
|
|
|
/*
|
|
* The negative predicate is impossible to test with PEG.js grammar
|
|
* structure.
|
|
*/
|
|
});
|
|
|
|
/*
|
|
* The EscapeCharacter rule is impossible to test with PEG.js grammar
|
|
* structure.
|
|
*/
|
|
|
|
/* Canonical HexEscapeSequence is "xFF". */
|
|
it("parses HexEscapeSequence", function() {
|
|
expect('start = "\\xFF"').toParseAs(literalGrammar("\xFF", false));
|
|
});
|
|
|
|
/* Canonical UnicodeEscapeSequence is "uFFFF". */
|
|
it("parses UnicodeEscapeSequence", function() {
|
|
expect('start = "\\uFFFF"').toParseAs(literalGrammar("\uFFFF", false));
|
|
});
|
|
|
|
/* Digit rules are not tested. */
|
|
|
|
/* Canonical AnyMatcher is ".". */
|
|
it("parses AnyMatcher", function() {
|
|
expect('start = .').toParseAs(anyGrammar());
|
|
});
|
|
|
|
/* Canonical CodeBlock is "{ code }". */
|
|
it("parses CodeBlock", function() {
|
|
expect('start = "abcd" { code }').toParseAs(actionGrammar(" code "));
|
|
});
|
|
|
|
/* Canonical Code is " code ". */
|
|
it("parses Code", function() {
|
|
expect('start = "abcd" {a}' ).toParseAs(actionGrammar("a"));
|
|
expect('start = "abcd" {abc}' ).toParseAs(actionGrammar("abc"));
|
|
expect('start = "abcd" {{a}}' ).toParseAs(actionGrammar("{a}"));
|
|
expect('start = "abcd" {{a}{b}{c}}').toParseAs(actionGrammar("{a}{b}{c}"));
|
|
|
|
expect('start = "abcd" {{}').toFailToParse();
|
|
expect('start = "abcd" {}}').toFailToParse();
|
|
});
|
|
|
|
/* Unicode character category rules and token rules are not tested. */
|
|
|
|
/* Canonical __ is "\n". */
|
|
it("parses __", function() {
|
|
expect('start ="abcd"' ).toParseAs(trivialGrammar);
|
|
expect('start = "abcd"' ).toParseAs(trivialGrammar);
|
|
expect('start =\r\n"abcd"' ).toParseAs(trivialGrammar);
|
|
expect('start =/* comment */"abcd"').toParseAs(trivialGrammar);
|
|
expect('start = "abcd"' ).toParseAs(trivialGrammar);
|
|
});
|
|
|
|
/* Canonical _ is " ". */
|
|
it("parses _", function() {
|
|
expect('a = "abcd"\r\nb = "efgh"' ).toParseAs(twoRuleGrammar);
|
|
expect('a = "abcd" \r\nb = "efgh"' ).toParseAs(twoRuleGrammar);
|
|
expect('a = "abcd"/* comment */\r\nb = "efgh"').toParseAs(twoRuleGrammar);
|
|
expect('a = "abcd" \r\nb = "efgh"' ).toParseAs(twoRuleGrammar);
|
|
});
|
|
|
|
/* Canonical EOS is ";". */
|
|
it("parses EOS", function() {
|
|
expect('a = "abcd"\n;b = "efgh"' ).toParseAs(twoRuleGrammar);
|
|
expect('a = "abcd" \r\nb = "efgh"' ).toParseAs(twoRuleGrammar);
|
|
expect('a = "abcd" // comment\r\nb = "efgh"').toParseAs(twoRuleGrammar);
|
|
expect('a = "abcd"\nb = "efgh"' ).toParseAs(twoRuleGrammar);
|
|
});
|
|
|
|
/* Canonical EOF is the end of input. */
|
|
it("parses EOF", function() {
|
|
expect('start = "abcd"\n').toParseAs(trivialGrammar);
|
|
});
|
|
});
|