sequences.js
make_sequences_1: {
options = {
sequences: true,
}
input: {
foo();
bar();
baz();
}
expect: {
foo(),bar(),baz();
}
}
make_sequences_2: {
options = {
sequences: true,
}
input: {
if (boo) {
foo();
bar();
baz();
} else {
x();
y();
z();
}
}
expect: {
if (boo) foo(),bar(),baz();
else x(),y(),z();
}
}
make_sequences_3: {
options = {
sequences: true,
}
input: {
function f() {
foo();
bar();
return baz();
}
function g() {
foo();
bar();
throw new Error();
}
}
expect: {
function f() {
return foo(), bar(), baz();
}
function g() {
throw foo(), bar(), new Error();
}
}
}
make_sequences_4: {
options = {
sequences: true,
}
input: {
x = 5;
if (y) z();
x = 5;
for (i = 0; i < 5; i++) console.log(i);
x = 5;
for (; i < 5; i++) console.log(i);
x = 5;
switch (y) {}
x = 5;
with (obj) {}
}
expect: {
if (x = 5, y) z();
for (x = 5, i = 0; i < 5; i++) console.log(i);
for (x = 5; i < 5; i++) console.log(i);
switch (x = 5, y) {}
with (x = 5, obj);
}
expect_stdout: true
}
lift_sequences_1: {
options = {
sequences: true,
}
input: {
var foo, x, y, bar;
foo = !(x(), y(), bar());
}
expect: {
var foo, x, y, bar;
x(), y(), foo = !bar();
}
}
lift_sequences_2: {
options = {
evaluate: true,
sequences: true,
}
input: {
var foo = 1, bar;
foo.x = (foo = {}, 10);
bar = (bar = {}, 10);
console.log(foo, bar);
}
expect: {
var foo = 1, bar;
foo.x = (foo = {}, 10),
bar = {}, bar = 10,
console.log(foo, bar);
}
expect_stdout: true
}
lift_sequences_3: {
options = {
conditionals: true,
sequences: true,
}
input: {
var x, foo, bar, baz;
x = (foo(), bar(), baz()) ? 10 : 20;
}
expect: {
var x, foo, bar, baz;
foo(), bar(), x = baz() ? 10 : 20;
}
}
lift_sequences_4: {
options = {
side_effects: true,
}
input: {
var x, foo, bar, baz;
x = (foo, bar, baz);
}
expect: {
var x, foo, bar, baz;
x = baz;
}
}
lift_sequences_5: {
options = {
sequences: true,
}
input: {
var a = 2, b;
a *= (b, a = 4, 3);
console.log(a);
}
expect: {
var a = 2, b;
b, a *= (a = 4, 3),
console.log(a);
}
expect_stdout: "6"
}
for_sequences: {
options = {
sequences: true,
}
input: {
// 1
foo();
bar();
for (; false;);
// 2
foo();
bar();
for (x = 5; false;);
// 3
x = (foo in bar);
for (; false;);
// 4
x = (foo in bar);
for (y = 5; false;);
// 5
x = function() {
foo in bar;
};
for (y = 5; false;);
}
expect: {
// 1
for (foo(), bar(); false;);
// 2
for (foo(), bar(), x = 5; false;);
// 3
x = (foo in bar);
for (; false;);
// 4
x = (foo in bar);
for (y = 5; false;);
// 5
for (x = function() {
foo in bar;
}, y = 5; false;);
}
}
limit_1: {
options = {
sequences: 3,
}
input: {
a;
b;
c;
d;
e;
f;
g;
h;
i;
j;
k;
}
expect: {
a, b, c;
d, e, f;
g, h, i;
j, k;
}
}
limit_2: {
options = {
sequences: 3,
}
input: {
a, b;
c, d;
e, f;
g, h;
i, j;
k;
}
expect: {
a, b, c, d;
e, f, g, h;
i, j, k;
}
}
negate_iife_for: {
options = {
negate_iife: true,
sequences: true,
}
input: {
(function() {})();
for (i = 0; i < 5; i++) console.log(i);
(function() {})();
for (; i < 10; i++) console.log(i);
}
expect: {
for (!function() {}(), i = 0; i < 5; i++) console.log(i);
for (!function() {}(); i < 10; i++) console.log(i);
}
expect_stdout: true
}
iife: {
options = {
sequences: true,
}
input: {
x = 42;
(function a() {})();
!function b() {}();
~function c() {}();
+function d() {}();
-function e() {}();
void function f() {}();
typeof function g() {}();
}
expect: {
x = 42, function a() {}(), function b() {}(), function c() {}(),
function d() {}(), function e() {}(), function f() {}(), function g() {}();
}
}
unsafe_undefined: {
options = {
conditionals: true,
if_return: true,
sequences: true,
side_effects: true,
unsafe_undefined: true,
}
input: {
function f(undefined) {
if (a)
return b;
if (c)
return d;
}
function g(undefined) {
if (a)
return b;
if (c)
return d;
e();
}
}
expect: {
function f(undefined) {
return a ? b : c ? d : undefined;
}
function g(undefined) {
return a ? b : c ? d : void e();
}
}
}
issue_1685: {
options = {
collapse_vars: true,
side_effects: true,
}
input: {
var a = 100, b = 10;
function f() {
var a = (a--, delete a && --b);
}
f();
console.log(a, b);
}
expect: {
var a = 100, b = 10;
function f() {
var a = (a--, delete a && --b);
}
f();
console.log(a, b);
}
expect_stdout: true
}
func_def_1: {
options = {
collapse_vars: true,
side_effects: true,
}
input: {
function f() {
return f = 0, !!f;
}
console.log(f());
}
expect: {
function f() {
return !!(f = 0);
}
console.log(f());
}
expect_stdout: "false"
}
func_def_2: {
options = {
collapse_vars: true,
side_effects: true,
}
input: {
console.log(function f() {
return f = 0, !!f;
}());
}
expect: {
console.log(function f() {
return f = 0, !!f;
}());
}
expect_stdout: "true"
}
func_def_3: {
options = {
collapse_vars: true,
side_effects: true,
}
input: {
function f() {
function g() {}
return g = 0, !!g;
}
console.log(f());
}
expect: {
function f() {
function g() {}
return !!(g = 0);
}
console.log(f());
}
expect_stdout: "false"
}
func_def_4: {
options = {
collapse_vars: true,
side_effects: true,
}
input: {
function f() {
function g() {
return g = 0, !!g;
}
return g();
}
console.log(f());
}
expect: {
function f() {
function g() {
return !!(g = 0);
}
return g();
}
console.log(f());
}
expect_stdout: "false"
}
func_def_5: {
options = {
collapse_vars: true,
side_effects: true,
}
input: {
function f() {
return function g(){
return g = 0, !!g;
}();
}
console.log(f());
}
expect: {
function f() {
return function g(){
return g = 0, !!g;
}();
}
console.log(f());
}
expect_stdout: "true"
}
issue_1758: {
options = {
sequences: true,
side_effects: true,
}
input: {
console.log(function(c) {
var undefined = 42;
return function() {
c--;
c--, c.toString();
return;
}();
}());
}
expect: {
console.log(function(c) {
var undefined = 42;
return function() {
return c--, c--, void c.toString();
}();
}());
}
expect_stdout: "undefined"
}
delete_seq_1: {
options = {
booleans: true,
evaluate: true,
side_effects: true,
}
input: {
console.log(delete (1, undefined));
console.log(delete (1, void 0));
console.log(delete (1, Infinity));
console.log(delete (1, 1 / 0));
console.log(delete (1, NaN));
console.log(delete (1, 0 / 0));
}
expect: {
console.log(!0);
console.log(!0);
console.log(!0);
console.log(!0);
console.log(!0);
console.log(!0);
}
expect_stdout: true
}
delete_seq_2: {
options = {
booleans: true,
evaluate: true,
side_effects: true,
}
input: {
console.log(delete (1, 2, undefined));
console.log(delete (1, 2, void 0));
console.log(delete (1, 2, Infinity));
console.log(delete (1, 2, 1 / 0));
console.log(delete (1, 2, NaN));
console.log(delete (1, 2, 0 / 0));
}
expect: {
console.log(!0);
console.log(!0);
console.log(!0);
console.log(!0);
console.log(!0);
console.log(!0);
}
expect_stdout: true
}
delete_seq_3: {
options = {
booleans: true,
evaluate: true,
keep_infinity: true,
side_effects: true,
}
input: {
console.log(delete (1, 2, undefined));
console.log(delete (1, 2, void 0));
console.log(delete (1, 2, Infinity));
console.log(delete (1, 2, 1 / 0));
console.log(delete (1, 2, NaN));
console.log(delete (1, 2, 0 / 0));
}
expect: {
console.log(!0);
console.log(!0);
console.log(!0);
console.log(!0);
console.log(!0);
console.log(!0);
}
expect_stdout: true
}
delete_seq_4: {
options = {
booleans: true,
evaluate: true,
sequences: true,
side_effects: true,
}
input: {
function f() {}
console.log(delete (f(), undefined));
console.log(delete (f(), void 0));
console.log(delete (f(), Infinity));
console.log(delete (f(), 1 / 0));
console.log(delete (f(), NaN));
console.log(delete (f(), 0 / 0));
}
expect: {
function f() {}
console.log((f(), !0)),
console.log((f(), !0)),
console.log((f(), !0)),
console.log((f(), !0)),
console.log((f(), !0)),
console.log((f(), !0));
}
expect_stdout: true
}
delete_seq_5: {
options = {
booleans: true,
evaluate: true,
keep_infinity: true,
sequences: true,
side_effects: true,
}
input: {
function f() {}
console.log(delete (f(), undefined));
console.log(delete (f(), void 0));
console.log(delete (f(), Infinity));
console.log(delete (f(), 1 / 0));
console.log(delete (f(), NaN));
console.log(delete (f(), 0 / 0));
}
expect: {
function f() {}
console.log((f(), !0)),
console.log((f(), !0)),
console.log((f(), !0)),
console.log((f(), !0)),
console.log((f(), !0)),
console.log((f(), !0));
}
expect_stdout: true
}
delete_seq_6: {
options = {
booleans: true,
evaluate: true,
side_effects: true,
}
input: {
var a;
console.log(delete (1, a));
}
expect: {
var a;
console.log(!0);
}
expect_stdout: true
}
side_effects: {
options = {
sequences: true,
side_effects: true,
}
input: {
0, a(), 1, b(), 2, c(), 3;
}
expect: {
a(), b(), c();
}
}
side_effects_cascade_1: {
options = {
collapse_vars: true,
conditionals: true,
sequences: true,
side_effects: true,
}
input: {
function f(a, b) {
a -= 42;
if (a < 0) a = 0;
b.a = a;
}
}
expect: {
function f(a, b) {
(a -= 42) < 0 && (a = 0), b.a = a;
}
}
}
side_effects_cascade_2: {
options = {
collapse_vars: true,
side_effects: true,
}
input: {
function f(a, b) {
b = a,
!a + (b += a) || (b += a),
b = a,
b;
}
}
expect: {
function f(a, b) {
!(b = a) + (b += a) || (b += a),
b = a;
}
}
}
side_effects_cascade_3: {
options = {
collapse_vars: true,
conditionals: true,
side_effects: true,
}
input: {
function f(a, b) {
"foo" ^ (b += a),
b ? false : (b = a) ? -1 : (b -= a) - (b ^= a),
a-- || !a,
a;
}
}
expect: {
function f(a, b) {
(b += a) || (b = a) || (b -= a, b ^= a),
a--;
}
}
}
issue_27: {
options = {
collapse_vars: true,
passes: 2,
sequences: true,
side_effects: true,
unused: true,
}
input: {
(function(jQuery) {
var $;
$ = jQuery;
$("body").addClass("foo");
})(jQuery);
}
expect: {
(function(jQuery) {
jQuery("body").addClass("foo");
})(jQuery);
}
}
issue_2062: {
options = {
booleans: true,
collapse_vars: true,
conditionals: true,
side_effects: true,
}
input: {
var a = 1;
if ([ a || a++ + a--, a++ + a--, a && a.var ]);
console.log(a);
}
expect: {
var a = 1;
a || (a++, a--), a++, --a && a.var;
console.log(a);
}
expect_stdout: "1"
}
issue_2313: {
options = {
collapse_vars: true,
sequences: true,
side_effects: true,
}
input: {
var a = 0, b = 0;
var foo = {
get c() {
a++;
return 42;
},
set c(c) {
b++;
},
d: function() {
this.c++;
if (this.c) console.log(a, b);
}
}
foo.d();
}
expect: {
var a = 0, b = 0;
var foo = {
get c() {
return a++, 42;
},
set c(c) {
b++;
},
d: function() {
if (this.c++, this.c) console.log(a, b);
}
}
foo.d();
}
expect_stdout: "2 1"
}
cascade_assignment_in_return: {
options = {
collapse_vars: true,
unused: true,
}
input: {
function f(a, b) {
return a = x(), b(a);
}
}
expect: {
function f(a, b) {
return b(x());
}
}
}
hoist_defun: {
options = {
join_vars: true,
sequences: true,
}
input: {
x();
function f() {}
y();
}
expect: {
function f() {}
x(), y();
}
}
hoist_decl: {
options = {
join_vars: true,
sequences: true,
}
input: {
var a;
w();
var b = x();
y();
for (var c; 0;) z();
var d;
}
expect: {
var a;
w();
var b = x(), c, d;
for (y(); 0;) z();
}
}
for_init_var: {
options = {
join_vars: true,
unused: false,
}
input: {
var a = "PASS";
(function() {
var b = 42;
for (var c = 5; c > 0;) c--;
a = "FAIL";
var a;
})();
console.log(a);
}
expect: {
var a = "PASS";
(function() {
for (var b = 42, c = 5, a; c > 0;) c--;
a = "FAIL";
})();
console.log(a);
}
expect_stdout: "PASS"
}
forin: {
options = {
sequences: true,
}
input: {
var o = [];
o.push("PASS");
for (var a in o)
console.log(o[a]);
}
expect: {
var o = [];
for (var a in o.push("PASS"), o)
console.log(o[a]);
}
expect_stdout: "PASS"
}
call: {
options = {
sequences: true,
}
input: {
var a = function() {
return this;
}();
function b() {
console.log("foo");
}
b.c = function() {
console.log(this === b ? "bar" : "baz");
};
(a, b)();
(a, b).c();
(a, b.c)();
(a, b)["c"]();
(a, b["c"])();
(a, function() {
console.log(this === a);
})();
new (a, b)();
new (a, b).c();
new (a, b.c)();
new (a, b)["c"]();
new (a, b["c"])();
new (a, function() {
console.log(this === a);
})();
console.log(typeof (a, b).c);
console.log(typeof (a, b)["c"]);
}
expect: {
var a = function() {
return this;
}();
function b() {
console.log("foo");
}
b.c = function() {
console.log(this === b ? "bar" : "baz");
},
b(),
b.c(),
(a, b.c)(),
b["c"](),
(a, b["c"])(),
function() {
console.log(this === a);
}(),
new b(),
new b.c(),
new b.c(),
new b["c"](),
new b["c"](),
new function() {
console.log(this === a);
}(),
console.log((a, typeof b.c)),
console.log((a, typeof b["c"]));
}
expect_stdout: [
"foo",
"bar",
"baz",
"bar",
"baz",
"true",
"foo",
"baz",
"baz",
"baz",
"baz",
"false",
"function",
"function",
]
}
missing_link: {
options = {
conditionals: true,
evaluate: true,
sequences: true,
}
input: {
var a = 100;
a;
a++ + (0 ? 2 : 1);
console.log(a);
}
expect: {
var a = 100;
a,
a++,
console.log(a);
}
}
angularjs_chain: {
options = {
conditionals: true,
sequences: true,
side_effects: true,
}
input: {
function nonComputedMember(left, right, context, create) {
var lhs = left();
if (create && create !== 1) {
if (lhs && lhs[right] == null) {
lhs[right] = {};
}
}
var value = lhs != null ? lhs[right] : undefined;
if (context) {
return { context: lhs, name: right, value: value };
} else {
return value;
}
}
}
expect: {
function nonComputedMember(left, right, context, create) {
var lhs = left();
create && 1 !== create && lhs && null == lhs[right] && (lhs[right] = {});
var value = null != lhs ? lhs[right] : void 0;
return context ? {
context: lhs,
name: right,
value: value
} : value;
}
}
}
issue_3490_1: {
options = {
conditionals: true,
dead_code: true,
inline: true,
sequences: true,
side_effects: true,
toplevel: true,
}
input: {
var b = 42, c = "FAIL";
if ({
3: function() {
var a;
return (a && a.p) < this;
}(),
}) c = "PASS";
if (b) while ("" == typeof d);
console.log(c, b);
}
expect: {
var b = 42, c = "FAIL";
if (function() {
var a;
a && a.p;
}(), c = "PASS", b) while ("" == typeof d);
console.log(c, b);
}
expect_stdout: "PASS 42"
}
issue_3490_2: {
options = {
conditionals: true,
dead_code: true,
evaluate: true,
inline: true,
reduce_vars: true,
sequences: true,
side_effects: true,
toplevel: true,
}
input: {
var b = 42, c = "FAIL";
if ({
3: function() {
var a;
return (a && a.p) < this;
}(),
}) c = "PASS";
if (b) for (; "" == typeof d;);
console.log(c, b);
}
expect: {
var b = 42, c = "FAIL";
for (function() {
var a;
}(), c = "PASS", b; "" == typeof d;);
console.log(c, b);
}
expect_stdout: "PASS 42"
}
issue_3703: {
options = {
evaluate: true,
sequences: true,
unsafe: true,
}
input: {
var a = "FAIL";
while ((a = "PASS", 0).foo = 0);
console.log(a);
}
expect: {
var a = "FAIL";
while (a = "PASS", (0).foo = 0);
console.log(a);
}
expect_stdout: "PASS"
}