Hello, we're using Pulumi v3.2.1 and Azure-Native 1.1.0. We want to unit test creating resources. We've followed the guide here: https://www.pulumi.com/docs/guides/testing/unit/ Unit tests are written in Typescript with Jest Our Mock looks like this:

runtime.setMocks({
    newResource(args: MockResourceArgs): { id: string | undefined; state: Record<string, any> } {
        const { type, id, name } = args;
        expect(type).toEqual("azure-nextgen:network/latest:Subnet");
        return {
            id,
            state: {
                ...args.inputs,
                name,
            },
        };
    },
    call(args: MockCallArgs) {
        return args.inputs;
    },
});

Running tests give: `Program run without the Pulumi engine available; re-run using the

pulumi

CLI` Is anyone able to help with why this is?

This isn't a problem with setMocks, just with the runtime not detecting that you're running as a test. Normally it does detect this correctly, but it is possible to "break" this detection. For example, in some of my test code I use pulumi.runtime.registerStackTransformation() which does not play well with Pulumi's test-detection logic.