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90 lines
2.7 KiB
JavaScript
90 lines
2.7 KiB
JavaScript
describe("compiler pass |removeProxyRules|", function() {
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var pass = PEG.compiler.passes.removeProxyRules;
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function proxyGrammar(rule) {
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return [rule, 'proxy = proxied', 'proxied = "a"'].join("\n");
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}
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function expressionDetails(details) {
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return {
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rules: [
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{ type: "rule", name: "start", expression: details },
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{ type: "rule", name: "proxied" }
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]
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};
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}
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var proxiedRefDetails = { type: "rule_ref", name: "proxied" },
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simpleDetails = expressionDetails({ expression: proxiedRefDetails });
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it("removes proxy rule from a rule", function() {
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expect(pass).toChangeAST(proxyGrammar('start = proxy'), {
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startRule: "proxied",
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rules: [
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{ type: "rule", name: "proxied" }
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]
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});
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});
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it("removes proxy rule from a named", function() {
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expect(pass).toChangeAST(
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proxyGrammar('start "start" = proxy'),
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simpleDetails
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);
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});
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it("removes proxy rule from a choice", function() {
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expect(pass).toChangeAST(
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proxyGrammar('start = proxy / "a" / "b"'),
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expressionDetails({ alternatives: [proxiedRefDetails, {}, {}] })
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);
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expect(pass).toChangeAST(
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proxyGrammar('start = "a" / "b" / proxy'),
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expressionDetails({ alternatives: [{}, {}, proxiedRefDetails] })
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);
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});
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it("removes proxy rule from an action", function() {
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expect(pass).toChangeAST(proxyGrammar('start = proxy { }'), simpleDetails);
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});
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it("removes proxy rule from a sequence", function() {
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expect(pass).toChangeAST(
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proxyGrammar('start = proxy "a" "b"'),
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expressionDetails({ elements: [proxiedRefDetails, {}, {}] })
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);
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expect(pass).toChangeAST(
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proxyGrammar('start = "a" "b" proxy'),
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expressionDetails({ elements: [{}, {}, proxiedRefDetails] })
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);
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});
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it("removes proxy rule from a labeled", function() {
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expect(pass).toChangeAST(proxyGrammar('start = label:proxy'), simpleDetails);
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});
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it("removes proxy rule from a text", function() {
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expect(pass).toChangeAST(proxyGrammar('start = $proxy'), simpleDetails);
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});
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it("removes proxy rule from a simple and", function() {
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expect(pass).toChangeAST(proxyGrammar('start = &proxy'), simpleDetails);
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});
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it("removes proxy rule from a simple not", function() {
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expect(pass).toChangeAST(proxyGrammar('start = &proxy'), simpleDetails);
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});
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it("removes proxy rule from an optional", function() {
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expect(pass).toChangeAST(proxyGrammar('start = proxy?'), simpleDetails);
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});
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it("removes proxy rule from a zero or more", function() {
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expect(pass).toChangeAST(proxyGrammar('start = proxy*'), simpleDetails);
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});
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it("removes proxy rule from a one or more", function() {
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expect(pass).toChangeAST(proxyGrammar('start = proxy+'), simpleDetails);
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});
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});
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