Re: [PATCH] git-send-email: add sendmailCommand option

[Gregory Anders <greg@gpanders.com>]

On Wed, 12 May 2021 12:21 -0500, Felipe Contreras wrote:
>The sole purpose of software is that it's useful to users. Software 
>that works today but not tomorrow is bad software.
>
>The primary purpose of the testing framework is to ensure that doesn't
>happen; that git keeps working in the same way today than it did
>yesterday.
>
>That's why it's more important that tests excercise the options people
>were using yesterday.
>
>In addition we also want to be testing new functionality, but that's *in
>addition*.
>
>Maybe at some point in the future more people will be using
>--sendmail-cmd, but right now that's not the case. Right now we need to
>be testing the option people are using *today*.

I agree with this completely. Is this requirement satisfied with the 
addition of a test that checks the usage of an absolute path with 
--smtp-server (the behavior that people were using yesterday), while all 
of the existing tests are still converted to the new option? I have such 
a test written (along with a few others) in the forthcoming v2 patch:

diff --git a/t/t9001-send-email.sh b/t/t9001-send-email.sh
index 65b3035371..45bc3c0c4c 100755
--- a/t/t9001-send-email.sh
+++ b/t/t9001-send-email.sh
@@ -2148,6 +2148,55 @@ test_expect_success $PREREQ 'leading and trailing 
whitespaces are removed' '
  	test_cmp expected-list actual-list
  '
  
+test_expect_success $PREREQ 'test using absolute path for --smtp-server' '
+	clean_fake_sendmail &&
+	git send-email \
+		--from="Example <nobody@example.com>" \
+		--to=nobody@example.com \
+		--smtp-server="$(pwd)/fake.sendmail" \
+		HEAD^ &&
+	test_path_is_file commandline1
+'
+
+test_expect_success $PREREQ 'arguments not supported with --smtp-server' '
+	test_expect_code 127 git send-email \
+		--from="Example <nobody@example.com>" \
+		--to=nobody@example.com \
+		--smtp-server="$(pwd)/fake.sendmail -f nobody@example.com" \
+		HEAD^
+'
+
+test_expect_success $PREREQ 'test using command name with --sendmail-cmd' '
+	clean_fake_sendmail &&
+	PATH="$(pwd):$PATH" \
+	git send-email \
+		--from="Example <nobody@example.com>" \
+		--to=nobody@example.com \
+		--sendmail-cmd="fake.sendmail" \
+		HEAD^ &&
+	test_path_is_file commandline1
+'
+
+test_expect_success $PREREQ 'test using arguments with --sendmail-cmd' '
+	clean_fake_sendmail &&
+	git send-email \
+		--from="Example <nobody@example.com>" \
+		--to=nobody@example.com \
+		--sendmail-cmd="\"$(pwd)/fake.sendmail\" -f nobody@example.com" \
+		HEAD^ &&
+	test_path_is_file commandline1
+'
+
+test_expect_success $PREREQ 'test shell expression with --sendmail-cmd' '
+	clean_fake_sendmail &&
+	git send-email \
+		--from="Example <nobody@example.com>" \
+		--to=nobody@example.com \
+		--sendmail-cmd="[ 1 -eq 1 ] && \"$(pwd)/fake.sendmail\"" \
+		HEAD^ &&
+	test_path_is_file commandline1
+'
+
  test_expect_success $PREREQ 'invoke hook' '
         mkdir -p .git/hooks &&