143 lines
4.3 KiB
JavaScript
143 lines
4.3 KiB
JavaScript
goog.provide('ol.test.expression');
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describe('ol.expression.parse', function() {
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it('parses a string and returns an expression', function() {
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var expr = ol.expression.parse('foo');
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expect(expr).to.be.a(ol.expression.Expression);
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});
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describe('primary expressions', function() {
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// http://www.ecma-international.org/ecma-262/5.1/#sec-11.1
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it('parses identifier expressions', function() {
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var expr = ol.expression.parse('foo');
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expect(expr).to.be.a(ol.expression.Identifier);
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expect(expr.evaluate({foo: 'bar'})).to.be('bar');
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});
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it('consumes whitespace as expected', function() {
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var expr = ol.expression.parse(' foo ');
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expect(expr).to.be.a(ol.expression.Identifier);
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expect(expr.evaluate({foo: 'bar'})).to.be('bar');
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});
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it('throws on invalid identifier expressions', function() {
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expect(function() {
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ol.expression.parse('3foo');
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}).throwException();
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});
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it('parses string literal expressions', function() {
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var expr = ol.expression.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('throws on unterminated string', function() {
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expect(function() {
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ol.expression.parse('"foo');
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}).throwException();
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});
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it('parses numeric literal expressions', function() {
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var expr = ol.expression.parse('.42e+2');
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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('throws on invalid number', function() {
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expect(function() {
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ol.expression.parse('.42eX');
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}).throwException();
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});
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it('parses boolean literal expressions', function() {
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var expr = ol.expression.parse('false');
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expect(expr).to.be.a(ol.expression.Literal);
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expect(expr.evaluate()).to.be(false);
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});
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it('parses null literal expressions', function() {
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var expr = ol.expression.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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describe('left-hand-side expressions', function() {
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// http://www.ecma-international.org/ecma-262/5.1/#sec-11.2
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it('parses member expressions with dot notation', function() {
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var expr = ol.expression.parse('foo.bar.baz');
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expect(expr).to.be.a(ol.expression.Member);
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var scope = {foo: {bar: {baz: 42}}};
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expect(expr.evaluate(scope)).to.be(42);
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});
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it('consumes whitespace as expected', function() {
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var expr = ol.expression.parse(' foo . bar . baz ');
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expect(expr).to.be.a(ol.expression.Member);
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var scope = {foo: {bar: {baz: 42}}};
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expect(expr.evaluate(scope)).to.be(42);
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});
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it('throws on invalid member expression', function() {
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expect(function() {
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ol.expression.parse('foo.4bar');
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}).throwException();
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});
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it('parses call expressions with literal arguments', function() {
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var expr = ol.expression.parse('foo(42, "bar")');
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expect(expr).to.be.a(ol.expression.Call);
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var scope = {
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foo: function(num, str) {
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expect(num).to.be(42);
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expect(str).to.be('bar');
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return str + num;
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}
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};
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expect(expr.evaluate(scope)).to.be('bar42');
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});
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it('throws on calls with unterminated arguments', function() {
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expect(function() {
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ol.expression.parse('foo(42,)');
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}).throwException();
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});
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});
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describe('unary operators', function() {
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// http://www.ecma-international.org/ecma-262/5.1/#sec-11.4
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it('parses logical not operator', function() {
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var expr = ol.expression.parse('!foo');
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expect(expr).to.be.a(ol.expression.Not);
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expect(expr.evaluate({foo: true})).to.be(false);
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expect(expr.evaluate({foo: false})).to.be(true);
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expect(expr.evaluate({foo: ''})).to.be(true);
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expect(expr.evaluate({foo: 'foo'})).to.be(false);
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});
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it('consumes whitespace as expected', function() {
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var expr = ol.expression.parse(' ! foo');
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expect(expr).to.be.a(ol.expression.Not);
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expect(expr.evaluate({foo: true})).to.be(false);
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expect(expr.evaluate({foo: false})).to.be(true);
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});
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});
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});
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goog.require('ol.expression');
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goog.require('ol.expression.Expression');
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goog.require('ol.expression.Identifier');
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goog.require('ol.expression.Literal');
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goog.require('ol.expression.Not');
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