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Small refactor 

Summary: This test can be simplified.

Reviewed By: davidaurelio

Differential Revision: D6834289

fbshipit-source-id: 23072230ce844c39b5fba30cfe7ad51e5a879bed
This commit is contained in:
Peter van der Zee 2018-02-01 02:31:36 -08:00 committed by Facebook Github Bot
parent bd345427a8
commit 7fcff0a976
1 changed files with 13 additions and 16 deletions
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29
packages/metro/src/JSTransformer/worker/__tests__/constant-folding-test.js
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@ -33,13 +33,18 @@ const babelOptions = {
retainLines: false,
};
function normalize({code}) {
function normalize({code}): string {
if (code === undefined || code === null) {
return 'FAIL';
}
return transformSync(code, babelOptions).code;
}
function fold(filename, code): string {
const p = parse(code);
return normalize(constantFolding(filename, p));
}
describe('constant expressions', () => {
it('can optimize conditional expressions with constant conditions', () => {
const code = `
@ -53,7 +58,7 @@ describe('constant expressions', () => {
'foo'==='bar' ? b : c,
f() ? g() : h()
);`;
expect(normalize(constantFolding('arbitrary.js', parse(code)))).toEqual(
expect(fold('arbitrary.js', code)).toEqual(
'a(true,true,2,true,{},{a:1},c,f()?g():h());',
);
});
@ -63,9 +68,7 @@ describe('constant expressions', () => {
var b = 'android' == 'android'
? ('production' != 'production' ? 'a' : 'A')
: 'i';`;
expect(normalize(constantFolding('arbitrary.js', parse(code)))).toEqual(
"var a=1;var b='A';",
);
expect(fold('arbitrary.js', code)).toEqual("var a=1;var b='A';");
});
it('can optimize logical operator expressions with constant conditions', () => {
@ -73,9 +76,7 @@ describe('constant expressions', () => {
var a = true || 1;
var b = 'android' == 'android' &&
'production' != 'production' || null || "A";`;
expect(normalize(constantFolding('arbitrary.js', parse(code)))).toEqual(
'var a=true;var b="A";',
);
expect(fold('arbitrary.js', code)).toEqual('var a=true;var b="A";');
});
it('can optimize logical operators with partly constant operands', () => {
@ -86,7 +87,7 @@ describe('constant expressions', () => {
var d = null || z();
var e = !1 && z();
`;
expect(normalize(constantFolding('arbitrary.js', parse(code)))).toEqual(
expect(fold('arbitrary.js', code)).toEqual(
'var a="truthy";var b=z();var c=null;var d=z();var e=false;',
);
});
@ -97,7 +98,7 @@ describe('constant expressions', () => {
var a = 1;
}
`;
expect(normalize(constantFolding('arbitrary.js', parse(code)))).toEqual('');
expect(fold('arbitrary.js', code)).toEqual('');
});
it('can optimize if-else-branches with constant conditions', () => {
@ -112,9 +113,7 @@ describe('constant expressions', () => {
var a = 'b';
}
`;
expect(normalize(constantFolding('arbitrary.js', parse(code)))).toEqual(
'{var a=3;var b=a+4;}',
);
expect(fold('arbitrary.js', code)).toEqual('{var a=3;var b=a+4;}');
});
it('can optimize nested if-else constructs', () => {
@ -133,8 +132,6 @@ describe('constant expressions', () => {
}
}
`;
expect(normalize(constantFolding('arbitrary.js', parse(code)))).toEqual(
"{{require('c');}}",
);
expect(fold('arbitrary.js', code)).toEqual("{{require('c');}}");
});
});