This adds a basic test for command substitution. A more advanced test currently fails, and is left commented-out for now. A basic example of the difference is that in bash
$ a=b; echo a=$(echo $a) b
but in hush
=> a=b; echo a=$(echo $a) a=
This is because command substitution takes place during parsing, before any of the rest of the command has been executed.
Signed-off-by: Sean Anderson seanga2@gmail.com ---
test/cmd/test_echo.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/test/cmd/test_echo.c b/test/cmd/test_echo.c index 13e1fb7c82..f3d44d840d 100644 --- a/test/cmd/test_echo.c +++ b/test/cmd/test_echo.c @@ -31,13 +31,21 @@ static struct test_data echo_data[] = { * j, q, x are among the least frequent letters in English. * Hence no collision for the variable name jQx is expected. */ - {"setenv jQx X; echo "a)" ${jQx} 'b)' '${jQx}' c) ${jQx}; setenv jQx", + {"setenv jQx X; echo "a)" ${jQx} 'b)' '${jQx}' c\) ${jQx}; setenv jQx", "a) X b) ${jQx} c) X"}, /* Test shell variable assignments without substitutions */ {"foo=bar echo baz", "baz"}, /* Test handling of shell variables. */ {"setenv jQx; for jQx in 1 2 3; do echo -n "${jQx}, "; done; echo;", "1, 2, 3, "}, + /* Test basic command substitution */ + {"jQx=3 echo 1 $(echo 2) $jQx", "1 2 3"}, + /* + * The following test fails because the subshell is evaluated before + * anything else, but the jQx2 assignment should happen beforehand + */ + //{"jQx2=2; echo 1 $(echo ${jQx2}) 3", + //"1 2 3"}, };
static int lib_test_hush_echo(struct unit_test_state *uts)