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'use strict';
const common = require('../common');
const assert = require('assert');
const path = require('path');
const fs = require('fs');
let watchSeenOne = 0;
let watchSeenTwo = 0;
let watchSeenThree = 0;
let watchSeenFour = 0;
const testDir = common.tmpDir;
const filenameOne = 'watch.txt';
const filepathOne = path.join(testDir, filenameOne);
const filenameTwo = 'hasOwnProperty';
const filepathTwo = filenameTwo;
const filepathTwoAbs = path.join(testDir, filenameTwo);
const filenameThree = 'charm'; // because the third time is
const filenameFour = 'get';
process.on('exit', function() {
fs.unlinkSync(filepathOne);
fs.unlinkSync(filepathTwoAbs);
fs.unlinkSync(filenameThree);
fs.unlinkSync(filenameFour);
assert.strictEqual(1, watchSeenOne);
assert.strictEqual(2, watchSeenTwo);
assert.strictEqual(1, watchSeenThree);
assert.strictEqual(1, watchSeenFour);
});
fs.writeFileSync(filepathOne, 'hello');
assert.throws(
function() {
fs.watchFile(filepathOne);
},
function(e) {
return e.message === '"watchFile()" requires a listener function';
}
);
assert.doesNotThrow(
function() {
fs.watchFile(filepathOne, function() {
fs.unwatchFile(filepathOne);
++watchSeenOne;
});
}
);
setTimeout(function() {
fs.writeFileSync(filepathOne, 'world');
}, 1000);
process.chdir(testDir);
fs.writeFileSync(filepathTwoAbs, 'howdy');
assert.throws(
function() {
fs.watchFile(filepathTwo);
},
function(e) {
return e.message === '"watchFile()" requires a listener function';
}
);
assert.doesNotThrow(
function() {
function a() {
fs.unwatchFile(filepathTwo, a);
++watchSeenTwo;
}
function b() {
fs.unwatchFile(filepathTwo, b);
++watchSeenTwo;
}
fs.watchFile(filepathTwo, a);
fs.watchFile(filepathTwo, b);
}
);
setTimeout(function() {
fs.writeFileSync(filepathTwoAbs, 'pardner');
}, 1000);
assert.doesNotThrow(
function() {
function b() {
fs.unwatchFile(filenameThree, b);
++watchSeenThree;
}
fs.watchFile(filenameThree, common.mustNotCall());
fs.watchFile(filenameThree, b);
fs.unwatchFile(filenameThree, common.mustNotCall());
}
);
setTimeout(function() {
fs.writeFileSync(filenameThree, 'pardner');
}, 1000);
setTimeout(function() {
fs.writeFileSync(filenameFour, 'hey');
}, 200);
setTimeout(function() {
fs.writeFileSync(filenameFour, 'hey');
}, 500);
assert.doesNotThrow(
function() {
function a() {
++watchSeenFour;
assert.strictEqual(1, watchSeenFour);
fs.unwatchFile('.' + path.sep + filenameFour, a);
}
fs.watchFile(filenameFour, a);
}
);
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