Solutionunvalidated
the test should be written like this — Mono result = testGatewayFilter.filter(exchange, e -> {. Outcome: assertEquals("test", e.getRequest().getHeaders().getFirst("test-header"));.
265b665d-a261-4457-b661-d992e5289f9b
the test should be written like this — Mono result = testGatewayFilter.filter(exchange, e -> {. Outcome: assertEquals("test", e.getRequest().getHeaders().getFirst("test-header"));.