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liquidjs/test/unit/parser/tokenizer.ts
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import { expect } from 'chai'
import { WordToken } from '../../../src/tokens/word-token'
import { NumberToken } from '../../../src/tokens/number-token'
import { PropertyAccessToken } from '../../../src/tokens/property-access-token'
import { RangeToken } from '../../../src/tokens/range-token'
import { OperatorToken } from '../../../src/tokens/operator-token'
import { Tokenizer } from '../../../src/parser/tokenizer'
import { TagToken } from '../../../src/tokens/tag-token'
import { QuotedToken } from '../../../src/tokens/quoted-token'
import { OutputToken } from '../../../src/tokens/output-token'
import { HTMLToken } from '../../../src/tokens/html-token'
describe('Tokenize', function () {
it('should read quoted', () => {
expect(new Tokenizer('"foo" ff').readQuoted()!.getText()).to.equal('"foo"')
expect(new Tokenizer(' "foo"ff').readQuoted()!.getText()).to.equal('"foo"')
})
it('should read value', () => {
expect(new Tokenizer('a[ b][ "c d" ]').readValueOrThrow().getText()).to.equal('a[ b][ "c d" ]')
expect(new Tokenizer('a.b[c[d.e]]').readValueOrThrow().getText()).to.equal('a.b[c[d.e]]')
})
it('should read number value', () => {
const token: NumberToken = new Tokenizer('2.33.2').readValueOrThrow() as any
expect(token).to.be.instanceOf(NumberToken)
expect(token.whole.getText()).to.equal('2')
expect(token.decimal!.getText()).to.equal('33')
expect(token.getText()).to.equal('2.33')
})
it('should read quoted value', () => {
const value = new Tokenizer('"foo"a').readValue()
expect(value).to.be.instanceOf(QuotedToken)
expect(value!.getText()).to.equal('"foo"')
})
it('should read property access value', () => {
expect(new Tokenizer('a[b]["c d"]').readValueOrThrow().getText()).to.equal('a[b]["c d"]')
})
it('should read hash', () => {
const hash1 = new Tokenizer('foo: 3').readHash()
expect(hash1!.name.content).to.equal('foo')
expect(hash1!.value!.getText()).to.equal('3')
const hash2 = new Tokenizer(', foo: a[ "bar"]').readHash()
expect(hash2!.name.content).to.equal('foo')
expect(hash2!.value!.getText()).to.equal('a[ "bar"]')
})
it('should read multiple hashs', () => {
const hashes = new Tokenizer(', limit: 3 reverse offset:off').readHashes()
expect(hashes).to.have.lengthOf(3)
const [limit, reverse, offset] = hashes
expect(limit.name.content).to.equal('limit')
expect(limit.value!.getText()).to.equal('3')
expect(reverse.name.content).to.equal('reverse')
expect(reverse.value).to.be.undefined
expect(offset.name.content).to.equal('offset')
expect(offset.value!.getText()).to.equal('off')
})
it('should read hash value with property access', () => {
const hashes = new Tokenizer('cols: 2, rows: data["rows"]').readHashes()
expect(hashes).to.have.lengthOf(2)
const [cols, rols] = hashes
expect(cols.name.content).to.equal('cols')
expect(cols.value!.getText()).to.equal('2')
expect(rols.name.content).to.equal('rows')
expect(rols.value!.getText()).to.equal('data["rows"]')
})
it('should read HTML token', function () {
const html = '<html><body><p>Lorem Ipsum</p></body></html>'
const tokenizer = new Tokenizer(html)
const tokens = tokenizer.readTopLevelTokens()
expect(tokens.length).to.equal(1)
expect(tokens[0]).instanceOf(HTMLToken)
expect((tokens[0] as HTMLToken).getContent()).to.equal(html)
})
it('should read tag token', function () {
const html = '<p>{% for p in a[1]%}</p>'
const tokenizer = new Tokenizer(html)
const tokens = tokenizer.readTopLevelTokens()
expect(tokens.length).to.equal(3)
const tag = tokens[1] as TagToken
expect(tag).instanceOf(TagToken)
expect(tag.name).to.equal('for')
expect(tag.args).to.equal('p in a[1]')
})
it('should read output token', function () {
const html = '<p>{{foo | date: "%Y-%m-%d"}}</p>'
const tokenizer = new Tokenizer(html)
const tokens = tokenizer.readTopLevelTokens()
expect(tokens.length).to.equal(3)
const output = tokens[1] as OutputToken
expect(output).instanceOf(OutputToken)
expect(output.content).to.equal('foo | date: "%Y-%m-%d"')
})
it('should handle consecutive value and tags', function () {
const html = '{{foo}}{{bar}}{%foo%}{%bar%}'
const tokenizer = new Tokenizer(html)
const tokens = tokenizer.readTopLevelTokens()
expect(tokens.length).to.equal(4)
const o1 = tokens[0] as OutputToken
const o2 = tokens[1] as OutputToken
const t1 = tokens[2] as TagToken
const t2 = tokens[3] as TagToken
expect(o1).instanceOf(OutputToken)
expect(o2).instanceOf(OutputToken)
expect(t1).instanceOf(TagToken)
expect(t2).instanceOf(TagToken)
expect(o1.content).to.equal('foo')
expect(o2.content).to.equal('bar')
expect(t1.name).to.equal('foo')
expect(t1.args).to.equal('')
expect(t2.name).to.equal('bar')
expect(t2.args).to.equal('')
})
it('should keep white spaces and newlines', function () {
const html = '{%foo%}\n{%bar %} \n {%alice%}'
const tokenizer = new Tokenizer(html)
const tokens = tokenizer.readTopLevelTokens()
expect(tokens.length).to.equal(5)
expect(tokens[1]).instanceOf(HTMLToken)
expect(tokens[1].getText()).to.equal('\n')
expect(tokens[3]).instanceOf(HTMLToken)
expect(tokens[3].getText()).to.equal(' \n ')
})
it('should handle multiple lines tag', function () {
const html = '{%foo\na:a\nb:1.23\n%}'
const tokenizer = new Tokenizer(html)
const tokens = tokenizer.readTopLevelTokens()
expect(tokens.length).to.equal(1)
expect(tokens[0]).instanceOf(TagToken)
expect((tokens[0] as TagToken).args).to.equal('a:a\nb:1.23')
expect(tokens[0].getText()).to.equal('{%foo\na:a\nb:1.23\n%}')
})
it('should handle multiple lines value', function () {
const html = '{{foo\n|date:\n"%Y-%m-%d"\n}}'
const tokenizer = new Tokenizer(html)
const tokens = tokenizer.readTopLevelTokens()
expect(tokens.length).to.equal(1)
expect(tokens[0]).instanceOf(OutputToken)
expect(tokens[0].getText()).to.equal('{{foo\n|date:\n"%Y-%m-%d"\n}}')
})
it('should handle complex object property access', function () {
const html = '{{ obj["my:property with anything"] }}'
const tokenizer = new Tokenizer(html)
const tokens = tokenizer.readTopLevelTokens()
expect(tokens.length).to.equal(1)
const output = tokens[0] as OutputToken
expect(output).instanceOf(OutputToken)
expect(output.content).to.equal('obj["my:property with anything"]')
})
it('should throw if tag not closed', function () {
const html = '{% assign foo = bar {{foo}}'
const tokenizer = new Tokenizer(html)
expect(() => tokenizer.readTopLevelTokens()).to.throw(/tag "{% assign foo..." not closed/)
})
it('should throw if output not closed', function () {
const tokenizer = new Tokenizer('{{name}')
expect(() => tokenizer.readTopLevelTokens()).to.throw(/output "{{name}" not closed/)
})
describe('#readRange()', () => {
it('should read `(1..3)`', () => {
const range = new Tokenizer('(1..3)').readRange()
expect(range).to.be.instanceOf(RangeToken)
expect(range!.getText()).to.deep.equal('(1..3)')
const { lhs, rhs } = range!
expect(lhs).to.be.instanceOf(NumberToken)
expect(lhs.getText()).to.equal('1')
expect(rhs).to.be.instanceOf(NumberToken)
expect(rhs.getText()).to.equal('3')
})
it('should throw for `(..3)`', () => {
expect(() => new Tokenizer('(..3)').readRange()).to.throw('unexpected token "..3)", value expected')
})
it('should read `(a.b..c["..d"])`', () => {
const range = new Tokenizer('(a.b..c["..d"])').readRange()
expect(range).to.be.instanceOf(RangeToken)
expect(range!.getText()).to.deep.equal('(a.b..c["..d"])')
})
})
describe('#readFilter()', () => {
it('should read a simple filter', function () {
const tokenizer = new Tokenizer('| plus')
const token = tokenizer.readFilter()
expect(token).to.have.property('name', 'plus')
expect(token).to.have.property('args').to.deep.equal([])
})
it('should read a filter with argument', function () {
const tokenizer = new Tokenizer(' | plus: 1')
const token = tokenizer.readFilter()
expect(token).to.have.property('name', 'plus')
expect(token!.args).to.have.lengthOf(1)
const one: NumberToken = token!.args[0] as any
expect(one).to.be.instanceOf(NumberToken)
expect(one.getText()).to.equal('1')
})
it('should read a filter with colon but no argument', function () {
const tokenizer = new Tokenizer('| plus:')
const token = tokenizer.readFilter()
expect(token).to.have.property('name', 'plus')
expect(token).to.have.property('args').to.deep.equal([])
})
it('should read null if name not found', function () {
const tokenizer = new Tokenizer('|')
const token = tokenizer.readFilter()
expect(token).to.be.null
})
it('should read a filter with k/v argument', function () {
const tokenizer = new Tokenizer(' | plus: a:1')
const token = tokenizer.readFilter()
expect(token).to.have.property('name', 'plus')
expect(token!.args).to.have.lengthOf(1)
const [k, v]: [string, NumberToken] = token!.args[0] as any
expect(k).to.equal('a')
expect(v).to.be.instanceOf(NumberToken)
expect(v.getText()).to.equal('1')
})
it('should read a filter with "arr[0]" argument', function () {
const tokenizer = new Tokenizer('| plus: arr[0]')
const token = tokenizer.readFilter()
expect(token).to.have.property('name', 'plus')
expect(token!.args).to.have.lengthOf(1)
const pa: PropertyAccessToken = token!.args[0] as any
expect(token!.args[0]).to.be.instanceOf(PropertyAccessToken)
expect(pa.variable.content).to.equal('arr')
expect(pa.props).to.have.lengthOf(1)
expect(pa.props[0]).to.be.instanceOf(NumberToken)
expect(pa.props[0].getText()).to.equal('0')
})
it('should read a filter with obj.foo argument', function () {
const tokenizer = new Tokenizer('| plus: obj.foo')
const token = tokenizer.readFilter()
expect(token).to.have.property('name', 'plus')
expect(token!.args).to.have.lengthOf(1)
const pa: PropertyAccessToken = token!.args[0] as any
expect(token!.args[0]).to.be.instanceOf(PropertyAccessToken)
expect(pa.variable.content).to.equal('obj')
expect(pa.props).to.have.lengthOf(1)
expect(pa.props[0]).to.be.instanceOf(WordToken)
expect(pa.props[0].getText()).to.equal('foo')
})
it('should read a filter with obj["foo"] argument', function () {
const tokenizer = new Tokenizer('| plus: obj["good luck"]')
const token = tokenizer.readFilter()
expect(token).to.have.property('name', 'plus')
expect(token!.args).to.have.lengthOf(1)
const pa: PropertyAccessToken = token!.args[0] as any
expect(token!.args[0]).to.be.instanceOf(PropertyAccessToken)
expect(pa.getText()).to.equal('obj["good luck"]')
expect(pa.variable.content).to.equal('obj')
expect(pa.props[0].getText()).to.equal('"good luck"')
})
})
describe('#readFilters()', () => {
it('should read simple filters', function () {
const tokenizer = new Tokenizer('| plus: 3 | capitalize')
const tokens = tokenizer.readFilters()
expect(tokens).to.have.lengthOf(2)
expect(tokens[0]).to.have.property('name', 'plus')
expect(tokens[0].args).to.have.lengthOf(1)
expect(tokens[0].args[0]).to.be.instanceOf(NumberToken)
expect((tokens[0].args[0] as any).getText()).to.equal('3')
expect(tokens[1]).to.have.property('name', 'capitalize')
expect(tokens[1].args).to.have.lengthOf(0)
})
it('should read filters', function () {
const tokenizer = new Tokenizer('| plus: a:3 | capitalize | append: foo[a.b["c d"]]')
const tokens = tokenizer.readFilters()
expect(tokens).to.have.lengthOf(3)
expect(tokens[0]).to.have.property('name', 'plus')
expect(tokens[0].args).to.have.lengthOf(1)
const [k, v]: [string, NumberToken] = tokens[0].args[0] as any
expect(k).to.equal('a')
expect(v).to.be.instanceOf(NumberToken)
expect(v.getText()).to.equal('3')
expect(tokens[1]).to.have.property('name', 'capitalize')
expect(tokens[1].args).to.have.lengthOf(0)
expect(tokens[2]).to.have.property('name', 'append')
expect(tokens[2].args).to.have.lengthOf(1)
expect(tokens[2].args[0]).to.be.instanceOf(PropertyAccessToken)
expect((tokens[2].args[0] as any).getText()).to.equal('foo[a.b["c d"]]')
expect((tokens[2].args[0] as any).props[0].getText()).to.equal('a.b["c d"]')
})
})
describe('#readExpression()', () => {
it('should read expression `a `', () => {
const exp = [...new Tokenizer('a ').readExpression()]
expect(exp).to.have.lengthOf(1)
expect(exp[0]).to.be.instanceOf(PropertyAccessToken)
expect(exp[0].getText()).to.deep.equal('a')
})
it('should read expression `a[][b]`', () => {
const exp = [...new Tokenizer('a[][b]').readExpression()]
expect(exp).to.have.lengthOf(1)
const pa = exp[0] as PropertyAccessToken
expect(pa).to.be.instanceOf(PropertyAccessToken)
expect(pa.variable.content).to.deep.equal('a')
expect(pa.props).to.have.lengthOf(2)
const [p1, p2] = pa.props
expect(p1).to.be.instanceOf(WordToken)
expect(p1.getText()).to.equal('')
expect(p2).to.be.instanceOf(PropertyAccessToken)
expect(p2.getText()).to.equal('b')
})
it('should read expression `a.`', () => {
const exp = [...new Tokenizer('a.').readExpression()]
expect(exp).to.have.lengthOf(1)
const pa = exp[0] as PropertyAccessToken
expect(pa).to.be.instanceOf(PropertyAccessToken)
expect(pa.variable.content).to.deep.equal('a')
expect(pa.props).to.have.lengthOf(0)
})
it('should read expression `a ==`', () => {
const exp = [...new Tokenizer('a ==').readExpression()]
expect(exp).to.have.lengthOf(1)
expect(exp[0]).to.be.instanceOf(PropertyAccessToken)
expect(exp[0].getText()).to.deep.equal('a')
})
it('should read expression `a==b`', () => {
const exp = new Tokenizer('a==b').readExpression()
const [a, equals, b] = exp
expect(a).to.be.instanceOf(PropertyAccessToken)
expect(a.getText()).to.deep.equal('a')
expect(equals).to.be.instanceOf(OperatorToken)
expect(equals.getText()).to.equal('==')
expect(b).to.be.instanceOf(PropertyAccessToken)
expect(b.getText()).to.deep.equal('b')
})
it('should read expression `^`', () => {
const exp = new Tokenizer('^').readExpression()
expect([...exp]).to.deep.equal([])
})
it('should read expression `a == b`', () => {
const exp = new Tokenizer('a == b').readExpression()
const [a, equals, b] = exp
expect(a).to.be.instanceOf(PropertyAccessToken)
expect(a.getText()).to.deep.equal('a')
expect(equals).to.be.instanceOf(OperatorToken)
expect(equals.getText()).to.equal('==')
expect(b).to.be.instanceOf(PropertyAccessToken)
expect(b.getText()).to.deep.equal('b')
})
it('should read expression `(1..3) contains 3`', () => {
const exp = new Tokenizer('(1..3) contains 3').readExpression()
const [range, contains, rhs] = exp
expect(range).to.be.instanceOf(RangeToken)
expect(range.getText()).to.deep.equal('(1..3)')
expect(contains).to.be.instanceOf(OperatorToken)
expect(contains.getText()).to.equal('contains')
expect(rhs).to.be.instanceOf(NumberToken)
expect(rhs.getText()).to.deep.equal('3')
})
it('should read expression `a[b] == c`', () => {
const exp = new Tokenizer('a[b] == c').readExpression()
const [lhs, contains, rhs] = exp
expect(lhs).to.be.instanceOf(PropertyAccessToken)
expect(lhs.getText()).to.deep.equal('a[b]')
expect(contains).to.be.instanceOf(OperatorToken)
expect(contains.getText()).to.equal('==')
expect(rhs).to.be.instanceOf(PropertyAccessToken)
expect(rhs.getText()).to.deep.equal('c')
})
it('should read expression `c[a["b"]] >= c`', () => {
const exp = new Tokenizer('c[a["b"]] >= c').readExpression()
const [lhs, op, rhs] = exp
expect(lhs).to.be.instanceOf(PropertyAccessToken)
expect(lhs.getText()).to.deep.equal('c[a["b"]]')
expect(op).to.be.instanceOf(OperatorToken)
expect(op.getText()).to.equal('>=')
expect(rhs).to.be.instanceOf(PropertyAccessToken)
expect(rhs.getText()).to.deep.equal('c')
})
it('should read expression `"][" == var`', () => {
const exp = new Tokenizer('"][" == var').readExpression()
const [lhs, equals, rhs] = exp
expect(lhs).to.be.instanceOf(QuotedToken)
expect(lhs.getText()).to.deep.equal('"]["')
expect(equals).to.be.instanceOf(OperatorToken)
expect(equals.getText()).to.equal('==')
expect(rhs).to.be.instanceOf(PropertyAccessToken)
expect(rhs.getText()).to.deep.equal('var')
})
it('should read expression `"\\\'" == "\\""`', () => {
const exp = new Tokenizer('"\\\'" == "\\""').readExpression()
const [lhs, equals, rhs] = exp
expect(lhs).to.be.instanceOf(QuotedToken)
expect(lhs.getText()).to.deep.equal('"\\\'"')
expect(equals).to.be.instanceOf(OperatorToken)
expect(equals.getText()).to.equal('==')
expect(rhs).to.be.instanceOf(QuotedToken)
expect(rhs.getText()).to.deep.equal('"\\""')
})
})
})