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describe('ast', function() {
if (!Handlebars.AST) {
return;
}
var AST = Handlebars.AST;
describe('BlockStatement', function() {
it('should throw on mustache mismatch', function() {
shouldThrow(function() {
handlebarsEnv.parse('\n {{#foo}}{{/bar}}');
}, Handlebars.Exception, "foo doesn't match bar - 2:5");
});
});
describe('helpers', function() {
describe('#helperExpression', function() {
it('should handle mustache statements', function() {
equals(AST.helpers.helperExpression({type: 'MustacheStatement', params: [], hash: undefined}), false);
equals(AST.helpers.helperExpression({type: 'MustacheStatement', params: [1], hash: undefined}), true);
equals(AST.helpers.helperExpression({type: 'MustacheStatement', params: [], hash: {}}), true);
});
it('should handle block statements', function() {
equals(AST.helpers.helperExpression({type: 'BlockStatement', params: [], hash: undefined}), false);
equals(AST.helpers.helperExpression({type: 'BlockStatement', params: [1], hash: undefined}), true);
equals(AST.helpers.helperExpression({type: 'BlockStatement', params: [], hash: {}}), true);
});
it('should handle subexpressions', function() {
equals(AST.helpers.helperExpression({type: 'SubExpression'}), true);
});
it('should work with non-helper nodes', function() {
equals(AST.helpers.helperExpression({type: 'Program'}), false);
equals(AST.helpers.helperExpression({type: 'PartialStatement'}), false);
equals(AST.helpers.helperExpression({type: 'ContentStatement'}), false);
equals(AST.helpers.helperExpression({type: 'CommentStatement'}), false);
equals(AST.helpers.helperExpression({type: 'PathExpression'}), false);
equals(AST.helpers.helperExpression({type: 'StringLiteral'}), false);
equals(AST.helpers.helperExpression({type: 'NumberLiteral'}), false);
equals(AST.helpers.helperExpression({type: 'BooleanLiteral'}), false);
equals(AST.helpers.helperExpression({type: 'UndefinedLiteral'}), false);
equals(AST.helpers.helperExpression({type: 'NullLiteral'}), false);
equals(AST.helpers.helperExpression({type: 'Hash'}), false);
equals(AST.helpers.helperExpression({type: 'HashPair'}), false);
});
});
});
describe('Line Numbers', function() {
var ast, body;
function testColumns(node, firstLine, lastLine, firstColumn, lastColumn) {
equals(node.loc.start.line, firstLine);
equals(node.loc.start.column, firstColumn);
equals(node.loc.end.line, lastLine);
equals(node.loc.end.column, lastColumn);
}
ast = Handlebars.parse(
'line 1 {{line1Token}}\n' // 1
+ ' line 2 {{line2token}}\n' // 2
+ ' line 3 {{#blockHelperOnLine3}}\n' // 3
+ 'line 4{{line4token}}\n' // 4
+ 'line5{{else}}\n' // 5
+ '{{line6Token}}\n' // 6
+ '{{/blockHelperOnLine3}}\n' // 7
+ '{{#open}}\n' // 8
+ '{{else inverse}}\n' // 9
+ '{{else}}\n' // 10
+ '{{/open}}'); // 11
body = ast.body;
it('gets ContentNode line numbers', function() {
var contentNode = body[0];
testColumns(contentNode, 1, 1, 0, 7);
});
it('gets MustacheStatement line numbers', function() {
var mustacheNode = body[1];
testColumns(mustacheNode, 1, 1, 7, 21);
});
it('gets line numbers correct when newlines appear', function() {
testColumns(body[2], 1, 2, 21, 8);
});
it('gets MustacheStatement line numbers correct across newlines', function() {
var secondMustacheStatement = body[3];
testColumns(secondMustacheStatement, 2, 2, 8, 22);
});
it('gets the block helper information correct', function() {
var blockHelperNode = body[5];
testColumns(blockHelperNode, 3, 7, 8, 23);
});
it('correctly records the line numbers the program of a block helper', function() {
var blockHelperNode = body[5],
program = blockHelperNode.program;
testColumns(program, 3, 5, 31, 5);
});
it('correctly records the line numbers of an inverse of a block helper', function() {
var blockHelperNode = body[5],
inverse = blockHelperNode.inverse;
testColumns(inverse, 5, 7, 13, 0);
});
it('correctly records the line number of chained inverses', function() {
var chainInverseNode = body[7];
testColumns(chainInverseNode.program, 8, 9, 9, 0);
testColumns(chainInverseNode.inverse, 9, 10, 16, 0);
testColumns(chainInverseNode.inverse.body[0].program, 9, 10, 16, 0);
testColumns(chainInverseNode.inverse.body[0].inverse, 10, 11, 8, 0);
});
});
describe('standalone flags', function() {
describe('mustache', function() {
it('does not mark mustaches as standalone', function() {
var ast = Handlebars.parse(' {{comment}} ');
equals(!!ast.body[0].value, true);
equals(!!ast.body[2].value, true);
});
});
describe('blocks', function() {
it('marks block mustaches as standalone', function() {
var ast = Handlebars.parse(' {{# comment}} \nfoo\n {{else}} \n bar \n {{/comment}} '),
block = ast.body[1];
equals(ast.body[0].value, '');
equals(block.program.body[0].value, 'foo\n');
equals(block.inverse.body[0].value, ' bar \n');
equals(ast.body[2].value, '');
});
it('marks initial block mustaches as standalone', function() {
var ast = Handlebars.parse('{{# comment}} \nfoo\n {{/comment}}'),
block = ast.body[0];
equals(block.program.body[0].value, 'foo\n');
});
it('marks mustaches with children as standalone', function() {
var ast = Handlebars.parse('{{# comment}} \n{{foo}}\n {{/comment}}'),
block = ast.body[0];
equals(block.program.body[0].value, '');
equals(block.program.body[1].path.original, 'foo');
equals(block.program.body[2].value, '\n');
});
it('marks nested block mustaches as standalone', function() {
var ast = Handlebars.parse('{{#foo}} \n{{# comment}} \nfoo\n {{else}} \n bar \n {{/comment}} \n{{/foo}}'),
body = ast.body[0].program.body,
block = body[1];
equals(body[0].value, '');
equals(block.program.body[0].value, 'foo\n');
equals(block.inverse.body[0].value, ' bar \n');
equals(body[0].value, '');
});
it('does not mark nested block mustaches as standalone', function() {
var ast = Handlebars.parse('{{#foo}} {{# comment}} \nfoo\n {{else}} \n bar \n {{/comment}} {{/foo}}'),
body = ast.body[0].program.body,
block = body[1];
equals(body[0].omit, undefined);
equals(block.program.body[0].value, ' \nfoo\n');
equals(block.inverse.body[0].value, ' bar \n ');
equals(body[0].omit, undefined);
});
it('does not mark nested initial block mustaches as standalone', function() {
var ast = Handlebars.parse('{{#foo}}{{# comment}} \nfoo\n {{else}} \n bar \n {{/comment}}{{/foo}}'),
body = ast.body[0].program.body,
block = body[0];
equals(block.program.body[0].value, ' \nfoo\n');
equals(block.inverse.body[0].value, ' bar \n ');
equals(body[0].omit, undefined);
});
it('marks column 0 block mustaches as standalone', function() {
var ast = Handlebars.parse('test\n{{# comment}} \nfoo\n {{else}} \n bar \n {{/comment}} '),
block = ast.body[1];
equals(ast.body[0].omit, undefined);
equals(block.program.body[0].value, 'foo\n');
equals(block.inverse.body[0].value, ' bar \n');
equals(ast.body[2].value, '');
});
});
describe('partials', function() {
it('marks partial as standalone', function() {
var ast = Handlebars.parse('{{> partial }} ');
equals(ast.body[1].value, '');
});
it('marks indented partial as standalone', function() {
var ast = Handlebars.parse(' {{> partial }} ');
equals(ast.body[0].value, '');
equals(ast.body[1].indent, ' ');
equals(ast.body[2].value, '');
});
it('marks those around content as not standalone', function() {
var ast = Handlebars.parse('a{{> partial }}');
equals(ast.body[0].omit, undefined);
ast = Handlebars.parse('{{> partial }}a');
equals(ast.body[1].omit, undefined);
});
});
describe('comments', function() {
it('marks comment as standalone', function() {
var ast = Handlebars.parse('{{! comment }} ');
equals(ast.body[1].value, '');
});
it('marks indented comment as standalone', function() {
var ast = Handlebars.parse(' {{! comment }} ');
equals(ast.body[0].value, '');
equals(ast.body[2].value, '');
});
it('marks those around content as not standalone', function() {
var ast = Handlebars.parse('a{{! comment }}');
equals(ast.body[0].omit, undefined);
ast = Handlebars.parse('{{! comment }}a');
equals(ast.body[1].omit, undefined);
});
});
});
});
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