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pegjs/spec/compiler/passes/remove-proxy-rules.spec.js

76 lines
2.4 KiB
JavaScript

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