Replace argparse with structopt

This patch changes the argument handling code to use structopt instead
of argparse using the data structures we introduced in the last patch.
As part of that transition we replace the old Error::ArgparseError
variant with ClapError that stores a structopt::clap::Error.

Because of that replacement, the format of the help messages changed,
breaking some of the tests. Hence, this change adapts them accordingly.
Also clap currently prints the version output to stdout, so we ignore
the version_option test case for now.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/tests/mod.rs b/src/tests/mod.rs
index 5ebf285..ac420f2 100644
--- a/src/tests/mod.rs
+++ b/src/tests/mod.rs
@@ -50,6 +50,13 @@ where
 {
   fn unwrap_str_err(self) -> String {
     match self.unwrap_err() {
+      crate::Error::ClapError(err) => {
+        if err.use_stderr() {
+          err.message
+        } else {
+          String::new()
+        }
+      }
       crate::Error::Error(err) => err,
       err => panic!("Unexpected error variant found: {:?}", err),
     }