tests: add fake adduser

So we can simulate what happens when adduser fails
ref https://gitlab.alpinelinux.org/alpine/alpine-conf/-/issues/10519

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/fake_adduser_test b/tests/fake_adduser_test
new file mode 100755
index 0000000..fe13690
--- /dev/null
+++ b/tests/fake_adduser_test
@@ -0,0 +1,21 @@
+#!/usr/bin/env atf-sh
+
+. $(atf_get_srcdir)/test_env.sh
+init_tests \
+	fake_adduser_usage \
+	fake_adduser_failure
+
+fake_adduser_usage_body() {
+	init_env
+	atf_check -s exit:0 \
+		-e match:"Usage: adduser" \
+		adduser --help
+}
+
+fake_adduser_failure_body() {
+	init_env
+	ADDUSER_EXIST=juser atf_check -s exit:1 \
+		-e match:"adduser: user 'juser' in use" \
+		adduser juser
+}
+