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Wrapping any value in `pulumi.secret` should work here.

thanks, i am using `pulumi.secret`, but I want to assert that in my test

e.g. i want to be able to:

```
it("is a secret", function(done) {
    infra.someOutput.isSecretOutput().then(isSecret =&gt; {
        assert.ok(isSecret);
        done();
    });
});
```

Ahh - I see.  Yes - it appears all the helpers that would answer this question are currently internal.  It does look like `pulumi.isSecretOutput` is something that should be able to be exposed publicly.

Note that you can still use this in the meantime - with something like:

```
(pulumi as any).isSecretOutput(o)
```

Or for easier usage:

```
const isSecretOutput: (o: Output&lt;any&gt;) =&gt; Promise&lt;boolean&gt; = (pulumi as any).isSecretOutput;
```

Opened <https://github.com/pulumi/pulumi/issues/2886>.