: if-true
:
$* <<EOI >>EOO
if true foo
  cmd1
  cmd2
end
EOI
? true foo
cmd1
cmd2
EOO

: if-false
:
$* <<EOI >>EOO
if false foo
  cmd1
  cmd2
end
EOI
? false foo
EOO

: ifn-true
:
$* <<EOI >>EOO
if! true foo
  cmd1
  cmd2
end
EOI
? true foo
EOO

: ifn-false
:
$* <<EOI >>EOO
if! false foo
  cmd1
  cmd2
end
EOI
? false foo
cmd1
cmd2
EOO

: elif-true
:
$* <<EOI >>EOO
if false
  cmd1
  cmd2
elif true
  cmd3
  cmd4
end
EOI
? false
? true
cmd3
cmd4
EOO

: elif-false
:
$* <<EOI >>EOO
if false
  cmd1
  cmd2
elif false
  cmd3
  cmd4
end
EOI
? false
? false
EOO

: elifn-true
:
$* <<EOI >>EOO
if false
  cmd1
  cmd2
elif! true
  cmd3
  cmd4
end
EOI
? false
? true
EOO

: elifn-false
:
$* <<EOI >>EOO
if false
  cmd1
  cmd2
elif! false
  cmd3
  cmd4
end
EOI
? false
? false
cmd3
cmd4
EOO

: else-true
:
$* <<EOI >>EOO
if false
  cmd1
  cmd2
else
  cmd3
  cmd4
end
EOI
? false
cmd3
cmd4
EOO

: else-false
:
$* <<EOI >>EOO
if true
  cmd1
  cmd2
else
  cmd3
  cmd4
end
EOI
? true
cmd1
cmd2
EOO

: if-chain
:
$* <<EOI >>EOO
if false
  cmd
  cmd
elif false
  cmd
  cmd
elif false
  cmd
  cmd
elif true
  cmd1
  cmd2
elif false
  cmd
  cmd
else
  cmd
  cmd
end
EOI
? false
? false
? false
? true
cmd1
cmd2
EOO

: nested-take
:
$* <<EOI >>EOO
if true
  cmd1
  if false
    cmd
  elif false
    if true
      cmd
    end
  else
    cmd2
  end
  cmd3
end
EOI
? true
cmd1
? false
? false
cmd2
cmd3
EOO

: nested-skip
:
$* <<EOI >>EOO
if false
  cmd1
  if false
    cmd
  elif false
    if true
      cmd
    end
  else
    cmd2
  end
  cmd3
else
  cmd
end
EOI
? false
cmd
EOO

: line-index
:
$* -l <<EOI >>EOO
if false
  cmd
  if true
    cmd
  end
  cmd
elif false
  cmd
else
  cmd
end
EOI
? false # 1
? false # 6
cmd # 8
EOO

: var
:
$* <<EOI >>EOO
if true
  x = foo
else
  x = bar
end;
cmd $x
EOI
? true
cmd foo
EOO

: semi-inside
:
$* <<EOI 2>>EOE != 0
if
  cmd;
  cmd
end
EOI
testscript:2:3: error: ';' inside 'if'
EOE

: colon-inside-leading
:
$* <<EOI 2>>EOE != 0
if
  : foo
  cmd
end
EOI
testscript:2:3: error: description inside 'if'
EOE

: colon-inside-trailing
:
$* <<EOI 2>>EOE != 0
if
  cmd : foo
end
EOI
testscript:2:3: error: description inside 'if'
EOE

: eos-inside
:
$* <<EOI 2>>EOE != 0
if
EOI
testscript:2:1: error: expected closing 'end'
EOE

: scope-inside
:
$* <<EOI 2>>EOE != 0
if
  cmd
  {
  }
end
EOI
testscript:3:3: error: expected closing 'end'
EOE

: setup-inside
:
$* <<EOI 2>>EOE != 0
if
  +cmd
end
EOI
testscript:2:3: error: setup command inside 'if'
EOE

: tdown-inside
:
$* <<EOI 2>>EOE != 0
if
  -cmd
end
EOI
testscript:2:3: error: teardown command inside 'if'
EOE

: if-without-command
:
$* <<EOI 2>>EOE != 0
if
  cmd
end
EOI
testscript:1:3: error: missing program
EOE

: command-after-else
:
$* <<EOI 2>>EOE != 0
if true
  cmd
else cmd
  cmd
end
EOI
testscript:3:6: error: expected newline instead of 'cmd'
EOE

: command-after-end
:
$* <<EOI 2>>EOE != 0
if true
  cmd
end cmd
EOI
testscript:3:5: error: expected newline instead of 'cmd'
EOE

: elif-without-if
:
$* <<EOI 2>>EOE != 0
cmd
elif true
  cmd
end
EOI
testscript:2:1: error: 'elif' without preceding 'if'
EOE

: elifn-without-if
:
$* <<EOI 2>>EOE != 0
cmd
elif! true
  cmd
end
EOI
testscript:2:1: error: 'elif!' without preceding 'if'
EOE

: else-without-if
:
$* <<EOI 2>>EOE != 0
cmd
else
  cmd
end
EOI
testscript:2:1: error: 'else' without preceding 'if'
EOE

: end-without-if
:
$* <<EOI 2>>EOE != 0
cmd
end
EOI
testscript:2:1: error: 'end' without preceding 'if'
EOE

: else-after-else
:
$* <<EOI 2>>EOE != 0
if false
  cmd
else
  cmd
else
  cmd
end
EOI
testscript:5:1: error: 'else' after 'else'
EOE

: elif-after-else
:
$* <<EOI 2>>EOE != 0
if false
  cmd
else
  cmd
elif true
  cmd
end
EOI
testscript:5:1: error: 'elif' after 'else'
EOE

: if-after-semi
:
$* -s <<EOI >>EOO
cmd1;
if true
  cmd2
end
EOI
{
  {
    cmd1
    ? true
    cmd2
  }
}
EOO

: setup-if
:
$* -s <<EOI >>EOO
+if true
  cmd
end
EOI
{
  ? true
  cmd
}
EOO

: tdown-if
:
$* -s <<EOI >>EOO
-if true
  cmd
end
EOI
{
  ? true
  cmd
}
EOO

: semi-after-end
:
$* -s <<EOI >>EOO
if true
  cmd1
end;
cmd2
EOI
{
  {
    ? true
    cmd1
    cmd2
  }
}
EOO

: colon-after-end
:
$* -s <<EOI >>EOO
if true
  cmd1
  cmd2
end : test
EOI
{
  : id:test
  {
    ? true
    cmd1
    cmd2
  }
}
EOO

: leading-and-trailing-description
:
$* <<EOI 2>>EOE != 0
: foo
if true
  cmd
end : bar
EOI
testscript:4:1: error: both leading and trailing descriptions
EOE