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test/parallel/test-constants.js

@@ -0,0 +1,30 @@
+// Flags: --expose-internals
+'use strict';
+
+require('../common');
+const { internalBinding } = require('internal/test/binding');
+const binding = internalBinding('constants');
+const constants = require('constants');
+const assert = require('assert');
+
+assert.ok(binding);
+assert.ok(binding.os);
+assert.ok(binding.os.signals);
+assert.ok(binding.os.errno);
+assert.ok(binding.fs);
+assert.ok(binding.crypto);
+
+['os', 'fs', 'crypto'].forEach((l) => {
+  Object.keys(binding[l]).forEach((k) => {
+    if (typeof binding[l][k] === 'object') { // errno and signals
+      Object.keys(binding[l][k]).forEach((j) => {
+        assert.strictEqual(binding[l][k][j], constants[j]);
+      });
+    }
+    if (l !== 'os') { // Top level os constant isn't currently copied
+      assert.strictEqual(binding[l][k], constants[k]);
+    }
+  });
+});
+
+assert.ok(Object.isFrozen(constants));