Handle and test wrong mpsd_release

install-mpsd-software-environment.py

@@ -92,7 +92,9 @@ def create_dir_structure(mpsd_release, script_dir):
         with os_chdir("spack-environments"):
             # Git fetch and checkout the release branch and git pull to be sure that the resulting repo is up to date
             subprocess.run(["git", "fetch", "--all"])
-            subprocess.run(["git", "checkout", mpsd_release])
+            checkout_result = subprocess.run(["git", "checkout", mpsd_release])
+            if checkout_result.returncode != 0:
+                raise Exception("Release branch does not exist in spack-environment repo \n. Check for typos.")
             subprocess.run(["git", "pull"])
 
 

tests.py

@@ -83,10 +83,18 @@ def test_setup_log_cmd(tmp_path):
 
 
 def test_install_environment(tmp_path):
-    # Expect and Exception when wrong toolchains are provided
+    # Expect an Exception when wrong toolchains are provided
     with pytest.raises(Exception):
         mod.install_environment(
             mpsd_release="dev-23a",
             toolchains=["wrong-toolchain"],
             script_dir=(tmp_path),
-        )
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+        )
+    # Expect an Exception when wrong mpsd_release is provided
+    with pytest.raises(Exception):
+        mod.install_environment(
+            mpsd_release="wrong-mpsd-release",
+            toolchains=["foss2021a-mpi"],
+            script_dir=(tmp_path),
+        )
+    
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