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68 lines
2.7 KiB
TypeScript
68 lines
2.7 KiB
TypeScript
import { Expression } from '../../../src/render/expression'
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import { expect } from 'chai'
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import { Context } from '../../../src/context/context'
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describe('Expression', function () {
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let ctx: Context
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beforeEach(function () {
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ctx = new Context({
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one: 1,
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two: 2,
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empty: '',
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x: 'XXX',
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y: undefined,
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z: null
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})
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})
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it('should throw when context not defined', async function () {
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return expect(() => new Expression().value()).to.throw(/context not defined/)
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})
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it('should eval simple expression', async function () {
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expect(new Expression('1 < 2').value(ctx)).to.equal(true)
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expect(new Expression('2 <= 2').value(ctx)).to.equal(true)
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expect(new Expression('one <= two').value(ctx)).to.equal(true)
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expect(new Expression('x contains "x"').value(ctx)).to.equal(false)
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expect(new Expression('x contains "X"').value(ctx)).to.equal(true)
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expect(new Expression('1 contains "x"').value(ctx)).to.equal(false)
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expect(new Expression('y contains "x"').value(ctx)).to.equal(false)
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expect(new Expression('z contains "x"').value(ctx)).to.equal(false)
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expect(new Expression('(1..5) contains 3').value(ctx)).to.equal(true)
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expect(new Expression('(1..5) contains 6').value(ctx)).to.equal(false)
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expect(new Expression('"<=" == "<="').value(ctx)).to.equal(true)
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})
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describe('complex expression', function () {
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it('should support value or value', async function () {
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expect(new Expression('false or true').value(ctx)).to.equal(true)
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})
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it('should support < and contains', async function () {
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expect(new Expression('1 < 2 and x contains "x"').value(ctx)).to.equal(false)
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})
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it('should support < or contains', async function () {
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expect(new Expression('1 < 2 or x contains "x"').value(ctx)).to.equal(true)
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})
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it('should support value and !=', async function () {
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expect(new Expression('empty and empty != ""').value(ctx)).to.equal(false)
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})
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it('should recognize quoted value', async function () {
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expect(new Expression('">"').value(ctx)).to.equal('>')
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})
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it('should evaluate from right to left', function () {
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expect(new Expression('true or false and false').value(ctx)).to.equal(true)
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expect(new Expression('true and false and false or true').value(ctx)).to.equal(false)
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})
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it('should recognize property access', function () {
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const ctx = new Context({ obj: { foo: true } })
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expect(new Expression('obj["foo"] and true').value(ctx)).to.equal(true)
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})
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})
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it('should eval range expression', async function () {
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expect(new Expression('(2..4)').value(ctx)).to.deep.equal([2, 3, 4])
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expect(new Expression('(two..4)').value(ctx)).to.deep.equal([2, 3, 4])
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})
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})
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