hclang
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Homoiconic C: Programming without a Language
36 lines • 4.18 kB
JavaScript
import { expect } from 'chai';
import { describe, it } from 'mocha';
import { FrameAlias, FrameExpr, FrameString, FrameSymbol } from '../../src/frames.js';
describe('FrameAlias', () => {
const key = 'atom';
const frame_alias = new FrameAlias(key);
const value_1 = new FrameString('neutron');
const value_2 = new FrameString('proton');
const parent = new FrameString('parent', { atom: value_1 });
const child = new FrameString('child');
child.up = parent;
it('is created from a string', () => {
expect(frame_alias).to.be.instanceOf(FrameAlias);
});
it('stringifies with @ prefix', () => {
expect(frame_alias.toString()).to.equal(`@${key}`);
});
it('evaluates to a setter for ancestor', () => {
const frame_key = FrameSymbol.for(key);
const result = frame_alias.in([child]);
expect(result.toString()).to.include(frame_key.toString());
const out = result.get(FrameAlias.kOUT);
expect(out).to.equal(parent);
});
it('sets properties in ancestor', () => {
const result_1 = child.get(key);
expect(result_1.toString()).to.include('neutron');
const frame_expr = new FrameExpr([frame_alias, value_2]);
frame_expr.in([child]);
const result_2 = child.get(key);
expect(result_2.toString()).to.include('proton');
const result_3 = parent.get(key);
expect(result_3.toString()).to.include('proton');
});
});
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