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macro-spec.js
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macro-spec.js
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var vows = require("vows");
var assert = require("assert");
var loop = require(__dirname + "/../../lib/loop");
var let_star = function() {
var code = "";
code += "(define-macro";
code += " (let ((var value) ...)";
code += " body ...)";
code += " ((function (var ...) body ...) value ...))";
code += "";
code += "(define-macro";
code += " (let* () body ...)";
code += " (let () body ...)";
code += "";
code += " (let* ((i1 v1)";
code += " (i2 v2) ...)";
code += " body ...)";
code += " (let ((i1 v1))";
code += " (let* ((i2 v2) ...)";
code += " body ...)))";
code += "";
return code;
};
vows.describe("integration specs (macros)").addBatch({
'it should be able to use a simple macro': function() {
var code = "";
code += "(define-macro";
code += " (swap-foo a b)";
code += " (foo b a))";
code += "\n";
code += "(swap-foo one two)";
assert.equal(loop.compile(code), "foo(two,one)");
},
'it should be able to define and use let': function() {
var code = "";
code += "(define-macro";
code += " (my-let ((var val) ...)";
code += " body ...)";
code += " ((lambda (var ...)";
code += " body ...) val ...))";
code += "(my-let ((x 10)";
code += " (y 20))";
code += " (console.log (+ x y)))";
assert.equal(loop.compile(code), "(function(x,y){console.log(x+y)})(10,20)");
},
'it should be able to define and use let with no values': function() {
var code = "";
code += "(define-macro\n";
code += " (my-let ((var val) ...)\n";
code += " body ...)\n";
code += " ((lambda (var ...)\n";
code += " body ...) val ...))\n";
code += "\n";
code += "(my-let ()\n";
code += " (console.log (+ x y)))\n";
assert.equal(loop.compile(code), "(function(){console.log(x+y)})()");
},
'it should be able to define and use an unless macro': function() {
var code = "";
code += "(define-macro";
code += " (unless condition";
code += " statements ...)";
code += " (if (! condition)";
code += " statements ...))";
code += "";
code += "(unless (=== x 10)";
code += " (bar)";
code += " (baz))";
// TODO: should probably convert this into x !== 10
var expectedCode = "if(!(x===10)){bar();baz()}";
assert.equal(loop.compile(code), expectedCode);
},
'it should be able to use unless with ! and a var': function() {
var code = "";
code += "(define-macro";
code += " (unless condition";
code += " statements ...)";
code += " (if (! condition)";
code += " statements ...))";
code += "";
code += "(var (x 20))";
code += "";
code += "(unless (=== x 10)";
code += " (console.log x))";
assert.equal(loop.compile(code), 'var x=20;if(!(x===10)){console.log(x)}');
},
'it should transform non top level macros': function() {
var code = "";
code += "(define-macro";
code += " (my-let ((var val) ...)";
code += " body ...)";
code += " ((lambda (var ...)";
code += " body ...) val ...))";
code += "(my-let ((x 10))";
code += " (my-let ((y 20))";
code += " (+ x y)))";
assert.equal(loop.compile(code), "(function(x){(function(y){x+y})(20)})(10)");
},
'it should be able to use two different macros': function() {
var code = "";
code += "(define-macro";
code += " (let ((var value) ...)";
code += " body ...)";
code += " ((function (var ...) body ...) value))";
code += "(define-macro";
code += " (log x)";
code += " (console.log x))";
code += "(let ((x 10))";
code += " (log x))";
var expected = "";
expected += "(function(x){";
expected += "console.log(x)";
expected += "})(10)";
assert.equal(loop.compile(code), expected);
},
'it should consider ... like a * in a regex': function() {
var code = '';
code += '(define-macro ';
code += ' (log arg1 arg2 arg3 ...)';
code += ' (console.log arg1 arg2 arg3 ...))';
code += '';
code += '(log 1 2)';
code += '(log 1 2 3)';
code += '(log 1 2 3 4)';
code += '(log 1 2 3 4 5)';
var expected = '';
expected += 'console.log(1,2);';
expected += 'console.log(1,2,3);';
expected += 'console.log(1,2,3,4);';
expected += 'console.log(1,2,3,4,5)';
assert.equal(loop.compile(code), expected);
},
'it should allow the gap in ... to come in the middle of a list': function() {
var code = '';
code += '(define-macro ';
code += ' (log arg1 arg2 ... arg3)';
code += ' (console.log arg1 arg2 ... arg3))';
code += '';
code += '(log 1 2)';
code += '(log 1 2 3)';
code += '(log 1 2 3 4)';
code += '(log 1 2 3 4 5)';
var expected = '';
expected += 'console.log(1,2);';
expected += 'console.log(1,2,3);';
expected += 'console.log(1,2,3,4);';
expected += 'console.log(1,2,3,4,5)';
},
'it should not try to transform a macro pattern which does not match': function() {
var code = '';
code += '(define-macro ';
code += ' (log arg1 arg2 arg3 ...)';
code += ' (console.log arg1 arg2 arg3 ...))';
code += '';
code += '(log 1)';
var expected = '';
expected += 'log(1)';
assert.equal(loop.compile(code), expected);
},
'it should be able to use multiple patterns in a macro': function() {
var code = "";
code += '(define-macro';
code += ' (log arg1 arg2 ...)';
code += ' (console.log arg1 arg2 ...)';
code += "\n";
code += ' (log)';
code += ' (console.log ""))';
code += "\n";
code += '(log)';
code += '(log "foo")';
var expected = "";
expected += 'console.log("");';
expected += 'console.log("foo")';
assert.equal(loop.compile(code), expected);
},
'it should ignore macro patterns if the code is not called': function() {
var code = "";
code += '(define-macro';
code += ' (log arg1 arg2 ...)';
code += ' (console.log arg1 arg2 ...))';
code += "\n";
code += '(console.log "foo")';
var expected = "";
expected += 'console.log("foo")';
assert.equal(loop.compile(code), expected);
},
'it should be able to use multiple patterns in a macro and extract out those patterns': function() {
var code = "";
code += '(define-macro';
code += ' (log)';
code += ' (console.log "")';
code += "\n";
code += ' (log arg1 arg2 ...)';
code += ' (console.log arg1 arg2 ...))';
var expected = "";
assert.equal(loop.compile(code), expected);
},
'it should not match a macro pattern if the macro has no ellipses and the pattern is not the same length': function() {
var code = "";
code += '(define-macro';
code += ' (log a b c)';
code += ' (console.log a b c))';
code += '';
code += '(log)';
code += '(log 1)';
code += '(log 1 2)';
code += '(log 1 2 3)';
code += '(log 1 2 3 4)';
var expected = "";
expected += "log();";
expected += "log(1);";
expected += "log(1,2);";
expected += "console.log(1,2,3);";
expected += "log(1,2,3,4)";
assert.equal(loop.compile(code), expected);
},
'it should be able to use multiple patterns in a macro if the patterns are switched': function() {
var code = "";
code += '(define-macro';
code += ' (log)';
code += ' (console.log "")';
code += "\n";
code += ' (log arg1 arg2 ...)';
code += ' (console.log arg1 arg2 ...))';
code += "\n";
code += '(log)';
code += '(log "foo")';
var expected = "";
expected += 'console.log("");';
expected += 'console.log("foo")';
assert.equal(loop.compile(code), expected);
},
'it should allow one macro to reference another': function() {
var code = "";
code += "(define-macro";
code += " (plus a b)";
code += " (+ a b))";
code += " ";
code += "(define-macro";
code += " (log-plus a b)";
code += " (console.log (plus a b)))";
code += " ";
code += "(log-plus 10 20)";
var expected = "";
expected += "console.log(10+20)";
assert.equal(loop.compile(code), expected);
},
'it should pick the correct macro based on arguments': function() {
var macroDefinitions = '';
var code;
macroDefinitions += '(define-macro';
macroDefinitions += ' (arg-macro)';
macroDefinitions += ' (console.log "zero-args")';
macroDefinitions += ' ';
macroDefinitions += ' (arg-macro x)';
macroDefinitions += ' (console.log "one-arg")';
macroDefinitions += ' ';
macroDefinitions += ' (arg-macro x y ...)';
macroDefinitions += ' (console.log "multi-args"))';
code = macroDefinitions;
code += '(arg-macro)';
assert.equal(loop.compile(code), 'console.log("zero-args")');
code = macroDefinitions;
code += '(arg-macro 1)';
assert.equal(loop.compile(code), 'console.log("one-arg")');
code = macroDefinitions;
code += '(arg-macro 1 2)';
assert.equal(loop.compile(code), 'console.log("multi-args")');
code = macroDefinitions;
code += '(arg-macro 1 2 3)';
assert.equal(loop.compile(code), 'console.log("multi-args")');
//////////////////
macroDefinitions = '';
macroDefinitions += '(define-macro';
macroDefinitions += ' (arg-macro ())';
macroDefinitions += ' (console.log "zero-args")';
macroDefinitions += ' ';
macroDefinitions += ' (arg-macro (x))';
macroDefinitions += ' (console.log "one-arg")';
macroDefinitions += ' ';
macroDefinitions += ' (arg-macro (x y ...))';
macroDefinitions += ' (console.log "multi-args"))';
code = macroDefinitions;
code += '(arg-macro ())';
assert.equal(loop.compile(code), 'console.log("zero-args")');
code = macroDefinitions;
code += '(arg-macro (1))';
assert.equal(loop.compile(code), 'console.log("one-arg")');
code = macroDefinitions;
code += '(arg-macro (1 2))';
assert.equal(loop.compile(code), 'console.log("multi-args")');
code = macroDefinitions;
code += '(arg-macro (1 2 3))';
assert.equal(loop.compile(code), 'console.log("multi-args")');
//////////////////
macroDefinitions = '';
macroDefinitions += '(define-macro';
macroDefinitions += ' (arg-macro ())';
macroDefinitions += ' (console.log "zero-args")';
macroDefinitions += ' ';
macroDefinitions += ' (arg-macro (x y ...))';
macroDefinitions += ' (console.log x y ...))';
code = macroDefinitions;
code += '(arg-macro ())';
assert.equal(loop.compile(code), 'console.log("zero-args")');
code = macroDefinitions;
code += '(arg-macro (1))';
assert.equal(loop.compile(code), 'console.log(1)');
code = macroDefinitions;
code += '(arg-macro (1 2))';
assert.equal(loop.compile(code), 'console.log(1,2)');
code = macroDefinitions;
code += '(arg-macro (1 2 3))';
assert.equal(loop.compile(code), 'console.log(1,2,3)');
},
'it should allow recursion in macros': function() {
var code = '';
code += '(define-macro';
code += ' (recursive-foo arg1)';
code += ' (bar)';
code += '';
code += ' (recursive-foo arg1 arg2 ...)';
code += ' (foo (recursive-foo arg2 ...)))';
code += '';
code += '(recursive-foo 1 2 3)';
var expected = 'foo(foo(bar()))';
assert.equal(loop.compile(code), expected);
},
'it should allow an empty argument list to let': function() {
var code = "";
code += "(define-macro";
code += " (let ((var value) ...)";
code += " body ...)";
code += " ((function (var ...) body ...) value ...))";
code += "(let ()";
code += " (foo))";
var expected = "(function(){foo()})()";
assert.equal(loop.compile(code), expected);
},
'using let-star': {
'it should return an empty function with 0 arguments': function() {
var code = "";
code += let_star();
code += "(let* ()";
code += " (console.log x))";
var expected = "";
expected += "(function(){";
expected += "console.log(x)";
expected += "})()";
assert.equal(loop.compile(code), expected);
},
'it should use one argument': function() {
var code = "";
code += let_star();
code += "(let* ((x 10))";
code += " (console.log x))";
var expected = "";
expected += "(function(x){";
expected += "(function(){";
expected += "console.log(x)";
expected += "})()";
expected += "})(10)";
assert.equal(loop.compile(code), expected);
},
'it should use two arguments': function() {
var code = "";
code += let_star();
code += "(let* ((x 10) (y 20))";
code += " (console.log x))";
var expected = "";
expected += "(function(x){";
expected += "(function(y){";
expected += "(function(){";
expected += "console.log(x)";
expected += "})()";
expected += "})(20)";
expected += "})(10)";
assert.equal(loop.compile(code), expected);
},
'it should use three arguments': function() {
var code = "";
code += let_star();
code += "(let* ((x 10) (y 20) (z 30))";
code += " (console.log x))";
var expected = "";
expected += "(function(x){";
expected += "(function(y){";
expected += "(function(z){";
expected += "(function(){";
expected += "console.log(x)";
expected += "})()";
expected += "})(30)";
expected += "})(20)";
expected += "})(10)";
assert.equal(loop.compile(code), expected);
},
'it should use one argument but multiple body statements': function() {
var code = "";
code += let_star();
code += "(let* ((x 10))";
code += " (console.log x)";
code += " (foo bar)";
code += " (baz quxx one two three)";
code += " (console.log 'foo'))";
var expected = "";
expected += "(function(x){";
expected += "(function(){";
expected += "console.log(x);";
expected += "foo(bar);";
expected += "baz(quxx,one,two,three);";
expected += "console.log(\"foo\")";
expected += "})()";
expected += "})(10)";
assert.equal(loop.compile(code), expected);
},
},
'quote': {
'it should be able to quote': function() {
var code = "(quote Foo)";
var expected = "\"Foo\"";
assert.equal(loop.compile(code), expected);
},
'it should be able to quote inside a define-macro': function() {
var code = '';
code += '(define-macro';
code += ' (my-quote some-var)';
code += ' (quote some-var))';
code += '(my-quote Foo)';
var expected = '"Foo"';
assert.equal(loop.compile(code), expected);
},
},
'it should allow substitution in the body of the macro more than once': function() {
var code = '';
code += '(define-macro ';
code += ' (my-square num)';
code += ' (mult num num))';
code += '(my-square 2)';
var expected = "mult(2,2)";
assert.equal(loop.compile(code), expected);
},
'it should allow multiple substiution on multiple levels': function() {
var code = '';
code += '(define-macro ';
code += ' (foo num)';
code += ' (mult num (mult num 1)))';
code += '(foo 2)';
var expected = "mult(2,mult(2,1))";
assert.equal(loop.compile(code), expected);
}
}).export(module);