[CAMEL-16082] Single choice() without otherwise() always executed

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.7.0, 3.7.1
• Fix Version/s: 3.7.2, 3.8.0
• Component/s: came-core
• Estimated Complexity: Unknown
• Regression: Regression
• Assignee: Claus Ibsen
• Reporter: Frank Wippermüller
• Created: 26/Jan/21 15:48
• Updated: 27/Jan/21 10:24
• Resolved: 27/Jan/21 10:24

Description

When building a route including a choice with a single when() and without an otherwise(), the first SimpleExpression-when() is always satisfied:

from("direct:start")
    .choice()
        .when().simple(expression)
		       // always routed to
		       .to(whenTarget)
    .end()
    .to(end)

An empty otherwise() restores choice logic:

from("direct:start")
    .choice()
        .when().simple(expression).to(whenTarget)
        .otherwise()
    .end()
    .to(end)

I included a simple Test-Case that fails with Camel 3.7.x and passes with Camel 3.6.x.