Files
UglifyJS/test/compress/numbers.js
Alex Lam S.L 257ddc3bdb improve compression of undefined, NaN & Infinitiy (#1748)
- migrate transformation logic from `OutputStream` to `Compressor`
- always turn `undefined` into `void 0` (unless `unsafe`)
- always keep `NaN` except when avoiding local variable redefinition
- introduce `keep_infinity` to suppress `1/0` transform, except when avoiding local variable redefinition

supersedes #1723
fixes #1730
2017-04-01 03:02:14 +08:00

205 lines
4.0 KiB
JavaScript

hex_numbers_in_parentheses_for_prototype_functions: {
input: {
(-2);
(-2).toFixed(0);
(2);
(2).toFixed(0);
(0.2);
(0.2).toFixed(0);
(0.00000002);
(0.00000002).toFixed(0);
(1000000000000000128);
(1000000000000000128).toFixed(0);
}
expect_exact: "-2;(-2).toFixed(0);2;2..toFixed(0);.2;.2.toFixed(0);2e-8;2e-8.toFixed(0);0xde0b6b3a7640080;(0xde0b6b3a7640080).toFixed(0);"
}
comparisons: {
options = {
comparisons: true,
}
input: {
console.log(
~x === 42,
x % n === 42
);
}
expect: {
console.log(
42 == ~x,
x % n == 42
);
}
}
evaluate_1: {
options = {
evaluate: true,
unsafe_math: false,
}
input: {
console.log(
x + 1 + 2,
x * 1 * 2,
+x + 1 + 2,
1 + x + 2 + 3,
1 | x | 2 | 3,
1 + x-- + 2 + 3,
1 + (x*y + 2) + 3,
1 + (2 + x + 3),
1 + (2 + ~x + 3),
-y + (2 + ~x + 3),
1 & (2 & x & 3),
1 + (2 + (x |= 0) + 3)
);
}
expect: {
console.log(
x + 1 + 2,
1 * x * 2,
+x + 1 + 2,
1 + x + 2 + 3,
3 | x,
1 + x-- + 2 + 3,
x*y + 2 + 1 + 3,
1 + (2 + x + 3),
2 + ~x + 3 + 1,
-y + (2 + ~x + 3),
0 & x,
2 + (x |= 0) + 3 + 1
);
}
}
evaluate_2: {
options = {
evaluate: true,
unsafe_math: true,
}
input: {
console.log(
x + 1 + 2,
x * 1 * 2,
+x + 1 + 2,
1 + x + 2 + 3,
1 | x | 2 | 3,
1 + x-- + 2 + 3,
1 + (x*y + 2) + 3,
1 + (2 + x + 3),
1 & (2 & x & 3),
1 + (2 + (x |= 0) + 3)
);
}
expect: {
console.log(
x + 1 + 2,
2 * x,
3 + +x,
1 + x + 2 + 3,
3 | x,
6 + x--,
6 + x*y,
1 + (2 + x + 3),
0 & x,
6 + (x |= 0)
);
}
}
evaluate_3: {
options = {
evaluate: true,
unsafe: true,
unsafe_math: true,
}
input: {
console.log(1 + Number(x) + 2);
}
expect: {
console.log(3 + +x);
}
}
evaluate_4: {
options = {
evaluate: true,
}
input: {
console.log(
1+ +a,
+a+1,
1+-a,
-a+1,
+a+ +b,
+a+-b,
-a+ +b,
-a+-b
);
}
expect: {
console.log(
+a+1,
+a+1,
1-a,
1-a,
+a+ +b,
+a-b,
-a+ +b,
-a-b
);
}
}
issue_1710: {
options = {
evaluate: true,
}
input: {
var x = {};
console.log((x += 1) + -x);
}
expect: {
var x = {};
console.log((x += 1) + -x);
}
expect_stdout: true
}
unary_binary_parenthesis: {
input: {
var v = [ 0, 1, NaN, Infinity, null, undefined, true, false, "", "foo", /foo/ ];
v.forEach(function(x) {
v.forEach(function(y) {
console.log(
+(x*y),
+(x/y),
+(x%y),
-(x*y),
-(x/y),
-(x%y)
);
});
});
}
expect: {
var v = [ 0, 1, NaN, 1/0, null, void 0, true, false, "", "foo", /foo/ ];
v.forEach(function(x) {
v.forEach(function(y) {
console.log(
+x*y,
+x/y,
+x%y,
-x*y,
-x/y,
-x%y
);
});
});
}
expect_stdout: true
}