initial

node_modules/onoff/test/debounce.js

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+"use strict";
+
+const assert = require('assert');
+const Gpio = require('../onoff').Gpio;
+const output = new Gpio(8, 'out');
+const button = new Gpio(7, 'in', 'both', {debounceTimeout: 10});
+
+let buttonPressedCount = 0;
+let buttonReleasedCount = 0;
+
+function simulateToggleButtonStateWithBounce(cb) {
+  let toggleCount = 0;
+
+  const iv = setInterval(() => {
+    if (toggleCount === 19) {
+      clearInterval(iv);
+      return cb();
+    }
+
+    output.writeSync(output.readSync() ^ 1);
+    toggleCount += 1;
+  }, 2);
+}
+
+function simulatePressAndReleaseButtonWithBounce() {
+  simulateToggleButtonStateWithBounce(() => {
+    setTimeout(() => {
+      simulateToggleButtonStateWithBounce(() => {
+        setTimeout(() => {
+          assert(buttonPressedCount === 1);
+          assert(buttonReleasedCount === 1);
+
+          button.unexport();
+          output.unexport();
+
+          console.log('ok - ' + __filename);
+        }, 20);
+      });
+    }, 50);
+  });
+}
+
+button.watch((err, value) => {
+  if (err) {
+    throw err;
+  }
+
+  if (value === 1) {
+    buttonPressedCount += 1;
+  } else if (value === 0) {
+    buttonReleasedCount += 1;
+  }
+});
+
+simulatePressAndReleaseButtonWithBounce();
+