@danielkalen/simplybind/benchmarks/src/bower_components/aurelia-binding/test/ast/binary.spec.js

Magically simple, framework-less one-way/two-way data binding for frontend/backend in ~5kb.

import {Binary, LiteralString, LiteralPrimitive} from '../../src/ast';
import {createScopeForTest} from '../../src/scope';

describe('Binary', () => {
  it('concats strings', () => {
    let expression = new Binary('+', new LiteralString('a'), new LiteralString('b'));
    let scope = createScopeForTest({});
    expect(expression.evaluate(scope, null)).toBe('ab');

    expression = new Binary('+', new LiteralString('a'), new LiteralPrimitive(null));
    scope = createScopeForTest({});
    expect(expression.evaluate(scope, null)).toBe('a');

    expression = new Binary('+', new LiteralPrimitive(null), new LiteralString('b'));
    scope = createScopeForTest({});
    expect(expression.evaluate(scope, null)).toBe('b');

    expression = new Binary('+', new LiteralString('a'), new LiteralPrimitive(undefined));
    scope = createScopeForTest({});
    expect(expression.evaluate(scope, null)).toBe('a');

    expression = new Binary('+', new LiteralPrimitive(undefined), new LiteralString('b'));
    scope = createScopeForTest({});
    expect(expression.evaluate(scope, null)).toBe('b');
  });

  it('adds numbers', () => {
    let expression = new Binary('+', new LiteralPrimitive(1), new LiteralPrimitive(2));
    let scope = createScopeForTest({});
    expect(expression.evaluate(scope, null)).toBe(3);

    expression = new Binary('+', new LiteralPrimitive(1), new LiteralPrimitive(null));
    scope = createScopeForTest({});
    expect(expression.evaluate(scope, null)).toBe(1);

    expression = new Binary('+', new LiteralPrimitive(null), new LiteralPrimitive(2));
    scope = createScopeForTest({});
    expect(expression.evaluate(scope, null)).toBe(2);

    expression = new Binary('+', new LiteralPrimitive(1), new LiteralPrimitive(undefined));
    scope = createScopeForTest({});
    expect(expression.evaluate(scope, null)).toBe(1);

    expression = new Binary('+', new LiteralPrimitive(undefined), new LiteralPrimitive(2));
    scope = createScopeForTest({});
    expect(expression.evaluate(scope, null)).toBe(2);
  });
});