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66 lines
2.4 KiB
JavaScript
66 lines
2.4 KiB
JavaScript
"use strict";
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let chai = require("chai");
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let helpers = require("./helpers");
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let peg = require("../../../../lib/peg");
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chai.use(helpers);
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let expect = chai.expect;
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describe("compiler pass |reportDuplicateLabels|", function() {
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let pass = peg.compiler.passes.check.reportDuplicateLabels;
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describe("in a sequence", function() {
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it("reports labels duplicate with labels of preceding elements", function() {
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expect(pass).to.reportError("start = a:'a' a:'a'", {
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message: "Label \"a\" is already defined at line 1, column 9.",
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location: {
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start: { offset: 14, line: 1, column: 15 },
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end: { offset: 19, line: 1, column: 20 }
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}
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});
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});
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it("doesn't report labels duplicate with labels in subexpressions", function() {
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expect(pass).to.not.reportError("start = ('a' / a:'a' / 'a') a:'a'");
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expect(pass).to.not.reportError("start = (a:'a' { }) a:'a'");
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expect(pass).to.not.reportError("start = ('a' a:'a' 'a') a:'a'");
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expect(pass).to.not.reportError("start = b:(a:'a') a:'a'");
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expect(pass).to.not.reportError("start = $(a:'a') a:'a'");
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expect(pass).to.not.reportError("start = &(a:'a') a:'a'");
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expect(pass).to.not.reportError("start = !(a:'a') a:'a'");
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expect(pass).to.not.reportError("start = (a:'a')? a:'a'");
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expect(pass).to.not.reportError("start = (a:'a')* a:'a'");
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expect(pass).to.not.reportError("start = (a:'a')+ a:'a'");
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expect(pass).to.not.reportError("start = (a:'a') a:'a'");
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});
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});
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describe("in a choice", function() {
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it("doesn't report labels duplicate with labels of preceding alternatives", function() {
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expect(pass).to.not.reportError("start = a:'a' / a:'a'");
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});
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});
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describe("in outer sequence", function() {
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it("reports labels duplicate with labels of preceding elements", function() {
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expect(pass).to.reportError("start = a:'a' (a:'a')", {
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message: "Label \"a\" is already defined at line 1, column 9.",
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location: {
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start: { offset: 15, line: 1, column: 16 },
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end: { offset: 20, line: 1, column: 21 }
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}
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});
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});
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it("doesn't report labels duplicate with the label of the current element", function() {
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expect(pass).to.not.reportError("start = a:(a:'a')");
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});
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it("doesn't report labels duplicate with labels of following elements", function() {
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expect(pass).to.not.reportError("start = (a:'a') a:'a'");
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});
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});
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});
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