hclang
Version:
Homoiconic C: Programming without a Language
67 lines • 6.86 kB
JavaScript
import { expect } from 'chai';
import { describe, it, beforeEach } from 'mocha';
import { Token } from '../../src/execute/lex.js';
import { ParsePipe } from '../../src/execute/parse-pipe.js';
import * as frame from '../../src/frames.js';
describe('Parse', () => {
const content = new frame.FrameString('content');
const token = new Token(content);
const symbol = frame.FrameSymbol.for(',');
let out;
let pipe;
beforeEach(() => {
out = new frame.FrameArray([]);
pipe = new ParsePipe(out, frame.FrameGroup);
});
describe('Token', () => {
it('is exported', () => {
expect(Token).to.be.ok;
});
it('is constructed from a Frame', () => {
expect(token).to.be.ok;
});
it('calls callee with content when called', () => {
const result = out.call(token);
expect(out.asArray().length).to.equal(1);
expect(out.at(0)).to.equal(content);
});
});
describe('ParsePipe', () => {
it('is exported', () => {
expect(ParsePipe).to.be.ok;
});
it('is constructed from an out parameter', () => {
expect(pipe).to.be.ok;
});
it('emits empty Group on end', () => {
pipe.call(frame.FrameSymbol.end());
expect(out.size()).to.equal(1);
const result = out.at(0);
expect(result).to.be.instanceOf(frame.FrameGroup);
});
it('adds token contents on `call`', () => {
expect(pipe.length()).to.equal(0);
pipe.call(token);
expect(pipe.length()).to.equal(1);
pipe.call(token);
expect(pipe.length()).to.equal(2);
});
it('collects contents on `next`', () => {
pipe.call(token);
expect(pipe.length()).to.equal(1);
pipe.next(false);
expect(pipe.length()).to.equal(0);
const collector = pipe.collector;
expect(collector.length).to.equal(1);
});
it('emits Grouped expr on `finish`', () => {
pipe.call(token);
pipe.call(frame.FrameSymbol.end());
expect(out.size()).to.equal(1);
const expr = out.at(0);
expect(expr).to.be.instanceOf(frame.FrameGroup);
expect(expr.toString()).to.equal(`((${content}))`);
});
});
});
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