Add some tests for stratisd-tools parser

Signed-off-by: mulhern <amulhern@redhat.com>

Makefile

@@ -374,6 +374,10 @@ test-stratisd-min:
 test-stratis-min:
 	RUSTFLAGS="${PROFILE_FLAGS}" RUST_BACKTRACE=1 RUST_TEST_THREADS=1 CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUNNER='sudo -E' cargo test --no-default-features --features "engine,min" test_stratis_min
 
+## Test stratisd-tools CLI
+test-stratisd-tools:
+	RUSTFLAGS="${PROFILE_FLAGS}" RUST_BACKTRACE=1 RUST_TEST_THREADS=1 CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUNNER='sudo -E' cargo test --no-default-features --features "engine,extras" test_stratisd_tools
+
 ## Run yamllint on workflow files
 yamllint:
 	yamllint --strict .github/workflows/*.yml .packit.yaml

tests/stratisd_tools.rs

@@ -0,0 +1,40 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#![cfg(all(feature = "engine", feature = "extras"))]
+
+use assert_cmd::Command;
+use predicates::prelude::predicate;
+
+const VERSION: &str = env!("CARGO_PKG_VERSION");
+
+// stratisd-tools parser tests
+
+#[test]
+// Test stratisd-tools -V produces version string.
+fn test_stratisd_tools_version() -> Result<(), Box<dyn std::error::Error>> {
+    let mut cmd = Command::cargo_bin("stratisd-tools")?;
+    cmd.arg("-V");
+    cmd.assert()
+        .success()
+        .stdout(predicate::str::contains(VERSION));
+    Ok(())
+}
+
+#[test]
+// Test stratisd-tools when no subcommand is given.
+fn test_stratisd_tools_no_subcommand() -> Result<(), Box<dyn std::error::Error>> {
+    let mut cmd = Command::cargo_bin("stratisd-tools")?;
+    cmd.assert().failure().code(2);
+    Ok(())
+}
+
+#[test]
+// Test that stratisd-tools rejects an unknown subcommand.
+fn test_stratisd_tools_bad_subcommand() -> Result<(), Box<dyn std::error::Error>> {
+    let mut cmd = Command::cargo_bin("stratisd-tools")?;
+    cmd.arg("notasub");
+    cmd.assert().failure().code(2);
+    Ok(())
+}