import {parse, SyntaxError} from "./NomScript.peggy";

describe("ScriptExpression", () => {
    describe("parse", () => {
        test("fails with an empty input", () => {
            expect(() => parse("", {grammarSource: "testData", startRule: "TopLevelExpression"})).toThrow(SyntaxError)
        });
        test("fails with empty lines", () => {
            expect(() => parse("\n\n\n\n\n", {grammarSource: "testData", startRule: "TopLevelExpression"})).toThrow(SyntaxError)
        });
        test("fails with lines filled only with whitespace", () => {
            expect(() => parse("\n\n       \n\t\t    \t\n\n", {grammarSource: "testData", startRule: "TopLevelExpression"})).toThrow(SyntaxError)
        });
        test("fails with lines filled only with comments", () => {
            expect(() => parse("\n\n    /*      */ \n// test \n /*     */\n", {grammarSource: "testData", startRule: "TopLevelExpression"})).toThrow(SyntaxError)
        });
        test("works for a simple expression", () => {
            expect(() => parse("73", {grammarSource: "testData", startRule: "TopLevelExpression"})).not.toThrow()
        });
        test("succeeds with end of line comments", () => {
            expect(() => parse("90 // you know", {grammarSource: "testData", startRule: "TopLevelExpression"})).not.toThrow()
        });
    });
});