[Canvas] switch function skips case statements

[th0ger]

Kibana version: 7.14.0

Describe the bug:
The switch statement in Canvas is broken after upgrading to 7.14.0.
It seems that if the first case is not matched, the switch statement jumps over all other cases, and returns the default statement.

Steps to reproduce:

switch 
  {case if=false then="case1"}
  {case if=true then="case2"}
  default="default"
| render as=debug

returns
{ "text": "default" }

Expected behavior:
{ "text": "case2" }

Any additional context:

• We upgraded from 7.13.3 which worked as expected.
• Notice, if case 1 is true, it returns the expected value:

switch 
  {case if=true then="case1"}
  {case if=false then="case2"}
  default="default"
| render as=debug

returns { "text": "case1" }

• I tried to prefice the case statement with case={...} which is optional according to the function reference. The result is the same.

[th0ger]

Anyone? This is a critical breaking change.

[elasticmachine]

Pinging @elastic/kibana-presentation (Team:Presentation)

[crob611]

This is indeed a bug and not an intended breaking change. This is also duplicate of #107934

A fix has been applied and will be available in 7.14.1

In the meantime, to workaround this bug, you can switch to using nested if statements instead of the switch/case logic.

For example

if={compare op="eq" to=1} then="green" else={ if={compare op="eq" to=0} then="blue" else ={...etc}}