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parseSpec.js
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3638 lines (3199 loc) · 125 KB
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'use strict';
describe('parser', function() {
describe('lexer', function() {
var lex;
beforeEach(function() {
/* global Lexer: false */
lex = function() {
var lexer = new Lexer({csp: false});
return lexer.lex.apply(lexer, arguments);
};
});
it('should only match number chars with isNumber', function() {
expect(Lexer.prototype.isNumber('0')).toBe(true);
expect(Lexer.prototype.isNumber('')).toBeFalsy();
expect(Lexer.prototype.isNumber(' ')).toBeFalsy();
expect(Lexer.prototype.isNumber(0)).toBeFalsy();
expect(Lexer.prototype.isNumber(false)).toBeFalsy();
expect(Lexer.prototype.isNumber(true)).toBeFalsy();
expect(Lexer.prototype.isNumber(undefined)).toBeFalsy();
expect(Lexer.prototype.isNumber(null)).toBeFalsy();
});
it('should tokenize a string', function() {
var tokens = lex("a.bc[22]+1.3|f:'a\\\'c':\"d\\\"e\"");
var i = 0;
expect(tokens[i].index).toEqual(0);
expect(tokens[i].text).toEqual('a');
i++;
expect(tokens[i].index).toEqual(1);
expect(tokens[i].text).toEqual('.');
i++;
expect(tokens[i].index).toEqual(2);
expect(tokens[i].text).toEqual('bc');
i++;
expect(tokens[i].index).toEqual(4);
expect(tokens[i].text).toEqual('[');
i++;
expect(tokens[i].index).toEqual(5);
expect(tokens[i].text).toEqual('22');
expect(tokens[i].value).toEqual(22);
expect(tokens[i].constant).toEqual(true);
i++;
expect(tokens[i].index).toEqual(7);
expect(tokens[i].text).toEqual(']');
i++;
expect(tokens[i].index).toEqual(8);
expect(tokens[i].text).toEqual('+');
i++;
expect(tokens[i].index).toEqual(9);
expect(tokens[i].text).toEqual('1.3');
expect(tokens[i].value).toEqual(1.3);
expect(tokens[i].constant).toEqual(true);
i++;
expect(tokens[i].index).toEqual(12);
expect(tokens[i].text).toEqual('|');
i++;
expect(tokens[i].index).toEqual(13);
expect(tokens[i].text).toEqual('f');
i++;
expect(tokens[i].index).toEqual(14);
expect(tokens[i].text).toEqual(':');
i++;
expect(tokens[i].index).toEqual(15);
expect(tokens[i].value).toEqual("a'c");
i++;
expect(tokens[i].index).toEqual(21);
expect(tokens[i].text).toEqual(':');
i++;
expect(tokens[i].index).toEqual(22);
expect(tokens[i].value).toEqual('d"e');
});
it('should tokenize identifiers with spaces around dots the same as without spaces', function() {
function getText(t) { return t.text; }
var spaces = lex('foo. bar . baz').map(getText);
var noSpaces = lex('foo.bar.baz').map(getText);
expect(spaces).toEqual(noSpaces);
});
it('should tokenize undefined', function() {
var tokens = lex("undefined");
var i = 0;
expect(tokens[i].index).toEqual(0);
expect(tokens[i].text).toEqual('undefined');
});
it('should tokenize quoted string', function() {
var str = "['\\'', \"\\\"\"]";
var tokens = lex(str);
expect(tokens[1].index).toEqual(1);
expect(tokens[1].value).toEqual("'");
expect(tokens[3].index).toEqual(7);
expect(tokens[3].value).toEqual('"');
});
it('should tokenize escaped quoted string', function() {
var str = '"\\"\\n\\f\\r\\t\\v\\u00A0"';
var tokens = lex(str);
expect(tokens[0].value).toEqual('"\n\f\r\t\v\u00A0');
});
it('should tokenize unicode', function() {
var tokens = lex('"\\u00A0"');
expect(tokens.length).toEqual(1);
expect(tokens[0].value).toEqual('\u00a0');
});
it('should ignore whitespace', function() {
var tokens = lex("a \t \n \r b");
expect(tokens[0].text).toEqual('a');
expect(tokens[1].text).toEqual('b');
});
it('should tokenize relation and equality', function() {
var tokens = lex("! == != < > <= >= === !==");
expect(tokens[0].text).toEqual('!');
expect(tokens[1].text).toEqual('==');
expect(tokens[2].text).toEqual('!=');
expect(tokens[3].text).toEqual('<');
expect(tokens[4].text).toEqual('>');
expect(tokens[5].text).toEqual('<=');
expect(tokens[6].text).toEqual('>=');
expect(tokens[7].text).toEqual('===');
expect(tokens[8].text).toEqual('!==');
});
it('should tokenize logical and ternary', function() {
var tokens = lex("&& || ? :");
expect(tokens[0].text).toEqual('&&');
expect(tokens[1].text).toEqual('||');
expect(tokens[2].text).toEqual('?');
expect(tokens[3].text).toEqual(':');
});
it('should tokenize statements', function() {
var tokens = lex("a;b;");
expect(tokens[0].text).toEqual('a');
expect(tokens[1].text).toEqual(';');
expect(tokens[2].text).toEqual('b');
expect(tokens[3].text).toEqual(';');
});
it('should tokenize function invocation', function() {
var tokens = lex("a()");
expect(tokens.map(function(t) { return t.text;})).toEqual(['a', '(', ')']);
});
it('should tokenize method invocation', function() {
var tokens = lex("a.b.c (d) - e.f()");
expect(tokens.map(function(t) { return t.text;})).
toEqual(['a', '.', 'b', '.', 'c', '(', 'd', ')', '-', 'e', '.', 'f', '(', ')']);
});
it('should tokenize number', function() {
var tokens = lex("0.5");
expect(tokens[0].value).toEqual(0.5);
});
it('should tokenize negative number', inject(function($rootScope) {
var value = $rootScope.$eval("-0.5");
expect(value).toEqual(-0.5);
value = $rootScope.$eval("{a:-0.5}");
expect(value).toEqual({a:-0.5});
}));
it('should tokenize number with exponent', inject(function($rootScope) {
var tokens = lex("0.5E-10");
expect(tokens[0].value).toEqual(0.5E-10);
expect($rootScope.$eval("0.5E-10")).toEqual(0.5E-10);
tokens = lex("0.5E+10");
expect(tokens[0].value).toEqual(0.5E+10);
}));
it('should throws exception for invalid exponent', function() {
expect(function() {
lex("0.5E-");
}).toThrowMinErr('$parse', 'lexerr', 'Lexer Error: Invalid exponent at column 4 in expression [0.5E-].');
expect(function() {
lex("0.5E-A");
}).toThrowMinErr('$parse', 'lexerr', 'Lexer Error: Invalid exponent at column 4 in expression [0.5E-A].');
});
it('should tokenize number starting with a dot', function() {
var tokens = lex(".5");
expect(tokens[0].value).toEqual(0.5);
});
it('should throw error on invalid unicode', function() {
expect(function() {
lex("'\\u1''bla'");
}).toThrowMinErr("$parse", "lexerr", "Lexer Error: Invalid unicode escape [\\u1''b] at column 2 in expression ['\\u1''bla'].");
});
});
describe('ast', function() {
var createAst;
beforeEach(function() {
/* global AST: false */
createAst = function() {
var lexer = new Lexer({csp: false});
var ast = new AST(lexer, {csp: false});
return ast.ast.apply(ast, arguments);
};
});
it('should handle an empty list of tokens', function() {
expect(createAst('')).toEqual({type: 'Program', body: []});
});
it('should understand identifiers', function() {
expect(createAst('foo')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: { type: 'Identifier', name: 'foo' }
}
]
}
);
});
it('should understand non-computed member expressions', function() {
expect(createAst('foo.bar')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'MemberExpression',
object: { type: 'Identifier', name: 'foo'},
property: {type: 'Identifier', name: 'bar'},
computed: false
}
}
]
}
);
});
it('should associate non-computed member expressions left-to-right', function() {
expect(createAst('foo.bar.baz')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'MemberExpression',
object: {
type: 'MemberExpression',
object: { type: 'Identifier', name: 'foo'},
property: { type: 'Identifier', name: 'bar' },
computed: false
},
property: {type: 'Identifier', name: 'baz'},
computed: false
}
}
]
}
);
});
it('should understand computed member expressions', function() {
expect(createAst('foo[bar]')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'MemberExpression',
object: { type: 'Identifier', name: 'foo'},
property: {type: 'Identifier', name: 'bar'},
computed: true
}
}
]
}
);
});
it('should associate computed member expressions left-to-right', function() {
expect(createAst('foo[bar][baz]')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'MemberExpression',
object: {
type: 'MemberExpression',
object: { type: 'Identifier', name: 'foo' },
property: { type: 'Identifier', name: 'bar' },
computed: true
},
property: { type: 'Identifier', name: 'baz' },
computed: true
}
}
]
}
);
});
it('should understand call expressions', function() {
expect(createAst('foo()')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'CallExpression',
callee: { type: 'Identifier', name: 'foo'},
arguments: []
}
}
]
}
);
});
it('should parse call expression arguments', function() {
expect(createAst('foo(bar, baz)')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'CallExpression',
callee: { type: 'Identifier', name: 'foo'},
arguments: [
{ type: 'Identifier', name: 'bar' },
{ type: 'Identifier', name: 'baz' }
]
}
}
]
}
);
});
it('should parse call expression left-to-right', function() {
expect(createAst('foo(bar, baz)(man, shell)')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'CallExpression',
callee: {
type: 'CallExpression',
callee: { type: 'Identifier', name: 'foo' },
arguments: [
{ type: 'Identifier', name: 'bar' },
{ type: 'Identifier', name: 'baz' }
]
},
arguments: [
{ type: 'Identifier', name: 'man' },
{ type: 'Identifier', name: 'shell' }
]
}
}
]
}
);
});
it('should keep the context when having superfluous parenthesis', function() {
expect(createAst('(foo)(bar, baz)')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'CallExpression',
callee: { type: 'Identifier', name: 'foo'},
arguments: [
{ type: 'Identifier', name: 'bar' },
{ type: 'Identifier', name: 'baz' }
]
}
}
]
}
);
});
it('should treat member expressions and call expression with the same precedence', function() {
expect(createAst('foo.bar[baz]()')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'CallExpression',
callee: {
type: 'MemberExpression',
object: {
type: 'MemberExpression',
object: { type: 'Identifier', name: 'foo' },
property: { type: 'Identifier', name: 'bar' },
computed: false
},
property: { type: 'Identifier', name: 'baz' },
computed: true
},
arguments: []
}
}
]
}
);
expect(createAst('foo[bar]().baz')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'MemberExpression',
object: {
type: 'CallExpression',
callee: {
type: 'MemberExpression',
object: { type: 'Identifier', name: 'foo' },
property: { type: 'Identifier', name: 'bar' },
computed: true
},
arguments: []
},
property: { type: 'Identifier', name: 'baz' },
computed: false
}
}
]
}
);
expect(createAst('foo().bar[baz]')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'MemberExpression',
object: {
type: 'MemberExpression',
object: {
type: 'CallExpression',
callee: { type: 'Identifier', name: 'foo' },
arguments: [] },
property: { type: 'Identifier', name: 'bar' },
computed: false
},
property: { type: 'Identifier', name: 'baz' },
computed: true
}
}
]
}
);
});
it('should understand literals', function() {
// In a strict sense, `undefined` is not a literal but an identifier
forEach({'123': 123, '"123"': '123', 'true': true, 'false': false, 'null': null, 'undefined': undefined}, function(value, expression) {
expect(createAst(expression)).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: { type: 'Literal', value: value }
}
]
}
);
});
});
it('should understand the `this` expression', function() {
expect(createAst('this')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: { type: 'ThisExpression' }
}
]
}
);
});
it('should understand the `$locals` expression', function() {
expect(createAst('$locals')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: { type: 'LocalsExpression' }
}
]
}
);
});
it('should not confuse `this`, `$locals`, `undefined`, `true`, `false`, `null` when used as identfiers', function() {
forEach(['this', '$locals', 'undefined', 'true', 'false', 'null'], function(identifier) {
expect(createAst('foo.' + identifier)).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'MemberExpression',
object: { type: 'Identifier', name: 'foo' },
property: { type: 'Identifier', name: identifier },
computed: false
}
}
]
}
);
});
});
it('should throw when trying to use non-identifiers as identifiers', function() {
expect(function() { createAst('foo.)'); }).toThrowMinErr('$parse', 'syntax',
"Syntax Error: Token ')' is not a valid identifier at column 5 of the expression [foo.)");
});
it('should throw when all tokens are not consumed', function() {
expect(function() { createAst('foo bar'); }).toThrowMinErr('$parse', 'syntax',
"Syntax Error: Token 'bar' is an unexpected token at column 5 of the expression [foo bar] starting at [bar]");
});
it('should understand the unary operators `-`, `+` and `!`', function() {
forEach(['-', '+', '!'], function(operator) {
expect(createAst(operator + 'foo')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'UnaryExpression',
operator: operator,
prefix: true,
argument: { type: 'Identifier', name: 'foo' }
}
}
]
}
);
});
});
it('should handle all unary operators with the same precedence', function() {
forEach([['+', '-', '!'], ['-', '!', '+'], ['!', '+', '-']], function(operators) {
expect(createAst(operators.join('') + 'foo')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'UnaryExpression',
operator: operators[0],
prefix: true,
argument: {
type: 'UnaryExpression',
operator: operators[1],
prefix: true,
argument: {
type: 'UnaryExpression',
operator: operators[2],
prefix: true,
argument: { type: 'Identifier', name: 'foo' }
}
}
}
}
]
}
);
});
});
it('should be able to understand binary operators', function() {
forEach(['*', '/', '%', '+', '-', '<', '>', '<=', '>=', '==','!=','===','!=='], function(operator) {
expect(createAst('foo' + operator + 'bar')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'BinaryExpression',
operator: operator,
left: { type: 'Identifier', name: 'foo' },
right: { type: 'Identifier', name: 'bar' }
}
}
]
}
);
});
});
it('should associate binary operators with the same precendence left-to-right', function() {
var operatorsByPrecedence = [['*', '/', '%'], ['+', '-'], ['<', '>', '<=', '>='], ['==','!=','===','!==']];
forEach(operatorsByPrecedence, function(operators) {
forEach(operators, function(op1) {
forEach(operators, function(op2) {
expect(createAst('foo' + op1 + 'bar' + op2 + 'baz')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'BinaryExpression',
operator: op2,
left: {
type: 'BinaryExpression',
operator: op1,
left: { type: 'Identifier', name: 'foo' },
right: { type: 'Identifier', name: 'bar' }
},
right: { type: 'Identifier', name: 'baz' }
}
}
]
}
);
});
});
});
});
it('should give higher prcedence to member calls than to unary expressions', function() {
forEach(['!', '+', '-'], function(operator) {
expect(createAst(operator + 'foo()')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'UnaryExpression',
operator: operator,
prefix: true,
argument: {
type: 'CallExpression',
callee: { type: 'Identifier', name: 'foo' },
arguments: []
}
}
}
]
}
);
expect(createAst(operator + 'foo.bar')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'UnaryExpression',
operator: operator,
prefix: true,
argument: {
type: 'MemberExpression',
object: { type: 'Identifier', name: 'foo' },
property: { type: 'Identifier', name: 'bar' },
computed: false
}
}
}
]
}
);
expect(createAst(operator + 'foo[bar]')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'UnaryExpression',
operator: operator,
prefix: true,
argument: {
type: 'MemberExpression',
object: { type: 'Identifier', name: 'foo' },
property: { type: 'Identifier', name: 'bar' },
computed: true
}
}
}
]
}
);
});
});
it('should give higher precedence to unary operators over multiplicative operators', function() {
forEach(['!', '+', '-'], function(op1) {
forEach(['*', '/', '%'], function(op2) {
expect(createAst(op1 + 'foo' + op2 + op1 + 'bar')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'BinaryExpression',
operator: op2,
left: {
type: 'UnaryExpression',
operator: op1,
prefix: true,
argument: { type: 'Identifier', name: 'foo' }
},
right: {
type: 'UnaryExpression',
operator: op1,
prefix: true,
argument: { type: 'Identifier', name: 'bar' }
}
}
}
]
}
);
});
});
});
it('should give binary operators their right precedence', function() {
var operatorsByPrecedence = [['*', '/', '%'], ['+', '-'], ['<', '>', '<=', '>='], ['==','!=','===','!==']];
for (var i = 0; i < operatorsByPrecedence.length - 1; ++i) {
forEach(operatorsByPrecedence[i], function(op1) {
forEach(operatorsByPrecedence[i + 1], function(op2) {
expect(createAst('foo' + op1 + 'bar' + op2 + 'baz' + op1 + 'man')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'BinaryExpression',
operator: op2,
left: {
type: 'BinaryExpression',
operator: op1,
left: { type: 'Identifier', name: 'foo' },
right: { type: 'Identifier', name: 'bar' }
},
right: {
type: 'BinaryExpression',
operator: op1,
left: { type: 'Identifier', name: 'baz' },
right: { type: 'Identifier', name: 'man' }
}
}
}
]
}
);
});
});
}
});
it('should understand logical operators', function() {
forEach(['||', '&&'], function(operator) {
expect(createAst('foo' + operator + 'bar')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'LogicalExpression',
operator: operator,
left: { type: 'Identifier', name: 'foo' },
right: { type: 'Identifier', name: 'bar' }
}
}
]
}
);
});
});
it('should associate logical operators left-to-right', function() {
forEach(['||', '&&'], function(op) {
expect(createAst('foo' + op + 'bar' + op + 'baz')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'LogicalExpression',
operator: op,
left: {
type: 'LogicalExpression',
operator: op,
left: { type: 'Identifier', name: 'foo' },
right: { type: 'Identifier', name: 'bar' }
},
right: { type: 'Identifier', name: 'baz' }
}
}
]
}
);
});
});
it('should understand ternary operators', function() {
expect(createAst('foo?bar:baz')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'ConditionalExpression',
test: { type: 'Identifier', name: 'foo' },
alternate: { type: 'Identifier', name: 'bar' },
consequent: { type: 'Identifier', name: 'baz' }
}
}
]
}
);
});
it('should associate the conditional operator right-to-left', function() {
expect(createAst('foo0?foo1:foo2?bar0?bar1:bar2:man0?man1:man2')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'ConditionalExpression',
test: { type: 'Identifier', name: 'foo0' },
alternate: { type: 'Identifier', name: 'foo1' },
consequent: {
type: 'ConditionalExpression',
test: { type: 'Identifier', name: 'foo2' },
alternate: {
type: 'ConditionalExpression',
test: { type: 'Identifier', name: 'bar0' },
alternate: { type: 'Identifier', name: 'bar1' },
consequent: { type: 'Identifier', name: 'bar2' }
},
consequent: {
type: 'ConditionalExpression',
test: { type: 'Identifier', name: 'man0' },
alternate: { type: 'Identifier', name: 'man1' },
consequent: { type: 'Identifier', name: 'man2' }
}
}
}
}
]
}
);
});
it('should understand assignment operator', function() {
// Currently, only `=` is supported
expect(createAst('foo=bar')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'AssignmentExpression',
left: { type: 'Identifier', name: 'foo' },
right: { type: 'Identifier', name: 'bar' },
operator: '='
}
}
]
}
);
});
it('should associate assignments right-to-left', function() {
// Currently, only `=` is supported
expect(createAst('foo=bar=man')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',
expression: {
type: 'AssignmentExpression',
left: { type: 'Identifier', name: 'foo' },
right: {
type: 'AssignmentExpression',
left: { type: 'Identifier', name: 'bar' },
right: { type: 'Identifier', name: 'man' },
operator: '='
},
operator: '='
}
}
]
}
);
});
it('should give higher precedence to equality than to the logical `and` operator', function() {
forEach(['==','!=','===','!=='], function(operator) {
expect(createAst('foo' + operator + 'bar && man' + operator + 'shell')).toEqual(
{
type: 'Program',
body: [
{
type: 'ExpressionStatement',