Cannot find a documented way to test if an object is a Kefir property or stream.

[beckyconning]

Is there a way to do something like the following?

var x = Kefir.constant(1);
var y = Kefir.never();

Kefir.isProperty(x); // returns: true
Kefir.isStream(y);  // returns true

Kefir.isProperty(y); // returns: false
Kefir.isStream(x); // returns: false

Kefir.isProperty({}); // returns: false
Kefir.isStream({}); // returns: false

If this worked regardless of which instance of Kefir the stream of property comes from I think that would be really useful for testing.

What I am doing at the moment is testing the .__proto__._name of the stream and or property.

[rpominov]

Sure, you can do this using the instanceof operator. All three base classes are exposed as Kefir.Observable, Kefir.Stream, and Kefir.Property.

Here is an example:

var x = Kefir.constant(1);
var y = Kefir.never();

x instanceof Kefir.Stream // false
y instanceof Kefir.Stream // true

x instanceof Kefir.Property // true
y instanceof Kefir.Property // false

x instanceof Kefir.Observable // true
y instanceof Kefir.Observable // true

[beckyconning]

Thanks, I changed the way tests are loaded so our app and tests both share the same instance of Kefir so that I could use this approach.

[rpominov]

Ah, I didn't realize you need it to work with different instances of Kefir. Yeah, using the same instance is preferable solution here. I am glad it worked out :)