Como provocar um erro de sintaxe no shell bash

Question

Eu só tenho 20% de cobertura de teste para o meu projeto. link

Eu quero adicionar um teste para erro de sintaxe. Não consigo receber a saída "erro de sintaxe" de um comando shell oneliner simples. Você poderia me ajudar com alguns exemplos?

    

Answer 1

;

retorna:

bash: syntax error near unexpected token ';'

    

Answer 2

Você pode usar a grande maioria das palavras reservadas e operadores de controle de bash para provocar um erro de sintaxe - vamos fazer um teste rápido para obter uma lista (obviamente incompleta!):

$ tabs 10
  for i in '|' '&' ';' '(' ')' '<' '>' '||' '&&' \
           ';;' '|&' 'case' 'coproc' 'do' 'done' \
           'elif' 'else' 'esac' 'fi' 'for' 'function' \
           'if' 'in' 'select' 'then' 'until' 'while' \
           '{' '}' '[[' ']]';
  do
    printf "%s\t" "$i"; bash -c $i |& sed '2d;s/.*://'
  done
|          syntax error near unexpected token '|'                                                                                                      
&          syntax error near unexpected token '&'
;          syntax error near unexpected token ';'
(          unexpected end of file
)          syntax error near unexpected token ')'
<          syntax error near unexpected token 'newline'
>          syntax error near unexpected token 'newline'
||         syntax error near unexpected token '||'
&&         syntax error near unexpected token '&&'
;;         syntax error near unexpected token ';;'
|&         syntax error near unexpected token '|&'
case       syntax error near unexpected token 'newline'
coproc     syntax error near unexpected token 'newline'
do         syntax error near unexpected token 'do'
done       syntax error near unexpected token 'done'
elif       syntax error near unexpected token 'elif'
else       syntax error near unexpected token 'else'
esac       syntax error near unexpected token 'esac'
fi         syntax error near unexpected token 'fi'
for        syntax error near unexpected token 'newline'
function   syntax error near unexpected token 'newline'
if         unexpected end of file
in         syntax error near unexpected token 'in'
select     syntax error near unexpected token 'newline'
then       syntax error near unexpected token 'then'
until      unexpected end of file
while      unexpected end of file
{          unexpected end of file
}          syntax error near unexpected token '}'
[[         unexpected token 'EOF' in conditional command
]]         syntax error near unexpected token ']]'

Eu peguei os de man bash / DEFINITIONS e < href="http://manpages.ubuntu.com/manpages/xenial/en/man1/bash.1.html#contenttoc8"> / PALAVRAS RESERVADAS .