hclang
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Homoiconic C: Programming without a Language
31 lines • 3.28 kB
JavaScript
import { expect } from 'chai';
import { describe, it } from 'mocha';
import { Frame, NilContext } from '../../src/frames.js';
describe('Frame', () => {
const frame = new Frame({ nil: Frame.nil });
it('is constructed from a dictionary', () => {
expect(frame).to.be.instanceOf(Frame);
});
it('has a unique nil for a property', () => {
const nil = Frame.nil;
expect(nil).to.be.instanceOf(Frame);
expect(Frame.nil).to.equal(nil);
});
it('returns argument when called with non-nil', () => {
const frame2 = new Frame(NilContext, false);
const result = frame.call(frame2);
expect(result).to.equal(frame2);
});
it('returns self when called with nil', () => {
const result = frame.call(Frame.nil);
expect(result).to.equal(frame);
});
it('stringifies to context', () => {
expect(Frame.nil.toString()).to.equal('()');
expect(frame.toString()).to.equal('(.nil ();)');
});
it('is in-dependent of context (literal)', () => {
expect(frame.in()).to.equal(frame);
});
});
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