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Split JS tests into manual and random

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Alex Kotliarskyi
2014-09-26 16:00:56 -07:00
parent d8c1889ba4
commit 2e954232d9
4 changed files with 121 additions and 88 deletions
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88
src/__tests__/Layout-test.js
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@@ -963,93 +963,5 @@ describe('Layout', function() {
);
});
it('should layout randomly', function() {
function RNG(seed) {
this.state = seed;
}
RNG.prototype.nextFloat = function() {
// LCG using GCC's constants
this.state = (1103515245 * this.state + 12345) % 0x80000000;
return this.state / (0x80000000 - 1);
};
var rng = new RNG(0);
function randMinMax(node, chance, attribute, min, max) {
if (rng.nextFloat() < chance) {
if (attribute === 'right' || attribute === 'bottom') {
return;
}
node.style[attribute] = Math.floor(rng.nextFloat() * (max - min)) + min;
}
}
function randEnum(node, chance, attribute, enumValues) {
if (rng.nextFloat() < chance) {
node.style[attribute] = enumValues[Math.floor(rng.nextFloat() * enumValues.length)];
}
}
function randChildren(node, chance) {
while (rng.nextFloat() < chance) {
if (!node.children) {
node.children = [];
}
node.children.push(generateRandomNode());
}
}
function randSpacing(node, chance, type, suffix, min, max) {
randMinMax(node, chance, type + suffix, min, max);
randMinMax(node, chance, type + 'Left' + suffix, min, max);
randMinMax(node, chance, type + 'Top' + suffix, min, max);
randMinMax(node, chance, type + 'Right' + suffix, min, max);
randMinMax(node, chance, type + 'Bottom' + suffix, min, max);
}
function generateRandomNode() {
var node = {style: {}};
randMinMax(node, 0.5, 'width', -100, 1000);
randMinMax(node, 0.5, 'height', -100, 1000);
randMinMax(node, 0.5, 'top', -10, 10);
randMinMax(node, 0.5, 'left', -10, 10);
randMinMax(node, 0.5, 'right', -10, 10);
randMinMax(node, 0.5, 'bottom', -10, 10);
randSpacing(node, 0.5, 'margin', '', -10, 20);
randSpacing(node, 0.5, 'padding', '', -10, 20);
randSpacing(node, 0.5, 'border', 'Width', -4, 4);
randMinMax(node, 0.5, 'flex', -10, 10);
randEnum(node, 0.5, 'flexDirection', ['column', 'row']);
randEnum(node, 0.5, 'justifyContent', ['flex-start', 'center', 'flex-end', 'space-between', 'space-around']);
randEnum(node, 0.5, 'alignItems', ['flex-start', 'center', 'flex-end', 'stretch']);
randEnum(node, 0.5, 'alignSelf', ['flex-start', 'center', 'flex-end', 'stretch']);
randEnum(node, 0.5, 'position', ['relative', 'absolute']);
randEnum(node, 0.5, 'measure', [text(texts.small), text(texts.big)]);
if (node.style.measure) {
// align-items: stretch on a text node makes it wrap in a different way.
// We don't yet support this use case
delete node.style.alignItems;
// Text that is position: absolute behaves very strangely
delete node.style.position;
}
randChildren(node, 0.4);
return node;
}
for (var i = 0; i < 100; ++i) {
var node = generateRandomNode();
if (JSON.stringify(computeLayout(node)) !== JSON.stringify(computeDOMLayout(node))) {
node = reduceTest(node);
}
// The iframe's body has a natural width of 300 that it doesn't really make
// to replicate in the test suite. The easiest workaround is not to test
// alignSelf, position and flex properties on the root element.
delete node.style.alignSelf;
delete node.style.flex;
delete node.style.position;
testRandomLayout(node, i);
}
})
});