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var assert = require("assert");
var exec = require("child_process").exec;
var fs = require("fs");
var reduce_test = require("../reduce");
function read(path) {
return fs.readFileSync(path, "utf8");
}
describe("test/reduce.js", function() {
this.timeout(60000);
it("Should reduce test case", function() {
var result = reduce_test(read("test/input/reduce/unsafe_math.js"), {
compress: {
unsafe_math: true,
},
mangle: false,
}, {
verbose: false,
});
if (result.error) throw result.error;
assert.strictEqual(result.code, read("test/input/reduce/unsafe_math.reduced.js"));
});
it("Should eliminate unreferenced labels", function() {
var result = reduce_test(read("test/input/reduce/label.js"), {
mangle: false,
}, {
verbose: false,
});
if (result.error) throw result.error;
assert.strictEqual(result.code, read("test/input/reduce/label.reduced.js"));
});
it("Should handle test cases with --toplevel", function() {
var result = reduce_test([
"var Infinity = 42;",
"console.log(Infinity);",
].join("\n"), {
toplevel: true,
});
if (result.error) throw result.error;
assert.strictEqual(result.code, [
"// Can't reproduce test failure with minify options provided:",
"// {",
'// "toplevel": true',
"// }",
"",
].join("\n"));
});
it("Should handle test result of NaN", function() {
var result = reduce_test("throw 0 / 0;");
if (result.error) throw result.error;
assert.strictEqual(result.code, [
"// Can't reproduce test failure with minify options provided:",
"// {",
'// "compress": {},',
'// "mangle": false',
"// }",
"",
].join("\n"));
});
it("Should print correct output for irreducible test case", function() {
var result = reduce_test([
"console.log(function f(a) {",
" return f.length;",
"}());",
].join("\n"), {
compress: {
keep_fargs: false,
},
mangle: false,
});
if (result.error) throw result.error;
assert.strictEqual(result.code, [
"console.log(function f(a) {",
" return f.length;",
"}());",
"// output: 1",
"// ",
"// minify: 0",
"// ",
"// options: {",
'// "compress": {',
'// "keep_fargs": false',
"// },",
'// "mangle": false',
"// }",
].join("\n"));
});
it("Should fail when invalid option is supplied", function() {
var result = reduce_test("", {
compress: {
unsafe_regex: true,
},
});
var err = result.error;
assert.ok(err instanceof Error);
assert.strictEqual(err.stack.split(/\n/)[0], "DefaultsError: `unsafe_regex` is not a supported option");
});
it("Should report on test case with invalid syntax", function() {
var result = reduce_test("var 0 = 1;");
var err = result.error;
assert.ok(err instanceof Error);
assert.strictEqual(err.stack.split(/\n/)[0], "SyntaxError: Name expected");
});
it("Should format multi-line output correctly", function() {
var code = [
"var a = 0;",
"",
"for (var b in [ 1, 2, 3 ]) {",
" a = +a + 1 - .2;",
" console.log(a);",
"}",
].join("\n");
var result = reduce_test(code, {
compress: {
unsafe_math: true,
},
mangle: false,
});
if (result.error) throw result.error;
assert.strictEqual(result.code, [
code,
"// output: 0.8",
"// 1.6",
"// 2.4",
"// ",
"// minify: 0.8",
"// 1.6",
"// 2.4000000000000004",
"// ",
"// options: {",
'// "compress": {',
'// "unsafe_math": true',
"// },",
'// "mangle": false',
"// }",
].join("\n"));
});
});
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