106 lines
2.8 KiB
JavaScript
106 lines
2.8 KiB
JavaScript
goog.provide('ol.test.expression.Parser');
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describe('ol.expression.Parser', function() {
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describe('constructor', function() {
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it('creates a new expression parser', function() {
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var parser = new ol.expression.Parser();
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expect(parser).to.be.a(ol.expression.Parser);
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});
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});
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describe('#parseArguments_()', function() {
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function parse(source) {
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var lexer = new ol.expression.Lexer(source);
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var parser = new ol.expression.Parser();
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return parser.parseArguments_(lexer);
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}
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it('parses comma separated expressions in parens', function() {
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var args = parse('(1/3, "foo", true)');
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expect(args).length(3);
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expect(args[0]).to.be.a(ol.expression.Math);
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expect(args[0].evaluate()).to.be(1 / 3);
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expect(args[1]).to.be.a(ol.expression.Literal);
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expect(args[1].evaluate()).to.be('foo');
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expect(args[2]).to.be.a(ol.expression.Literal);
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expect(args[2].evaluate()).to.be(true);
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});
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it('throws on invalid arg expression', function() {
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expect(function() {
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parse('(6e)');
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}).throwException();
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});
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it('throws on unterminated args', function() {
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expect(function() {
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parse('("foo", 42, )');
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}).throwException();
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});
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});
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describe('#parseGroupExpression_()', function() {
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function parse(source) {
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var lexer = new ol.expression.Lexer(source);
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var parser = new ol.expression.Parser();
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return parser.parseGroupExpression_(lexer);
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}
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it('parses grouped expressions', function() {
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var expr = parse('(3 * (foo + 2))');
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expect(expr).to.be.a(ol.expression.Math);
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expect(expr.evaluate({foo: 3})).to.be(15);
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});
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});
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describe('#parsePrimaryExpression_()', function() {
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function parse(source) {
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var lexer = new ol.expression.Lexer(source);
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var parser = new ol.expression.Parser();
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return parser.parsePrimaryExpression_(lexer);
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}
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it('parses string literal', function() {
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var expr = parse('"foo"');
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expect(expr).to.be.a(ol.expression.Literal);
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expect(expr.evaluate()).to.be('foo');
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});
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it('parses numeric literal', function() {
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var expr = parse('.42e2');
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expect(expr).to.be.a(ol.expression.Literal);
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expect(expr.evaluate()).to.be(42);
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});
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it('parses boolean literal', function() {
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var expr = parse('.42e2');
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expect(expr).to.be.a(ol.expression.Literal);
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expect(expr.evaluate()).to.be(42);
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});
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it('parses null literal', function() {
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var expr = parse('null');
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expect(expr).to.be.a(ol.expression.Literal);
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expect(expr.evaluate()).to.be(null);
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});
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});
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});
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goog.require('ol.expression.Expression');
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goog.require('ol.expression.Lexer');
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goog.require('ol.expression.Math');
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goog.require('ol.expression.Parser');
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