From 31043ac1deb003d77706d5162cffe7a2debc86e4 Mon Sep 17 00:00:00 2001
From: Cory Kinney <cory.kinney@ucf.edu>
Date: Tue, 9 Jul 2024 13:33:02 -0400
Subject: [PATCH] [Test] yaml2ck: Add test for phase with no reactions

The test case verifies that a phase with no reactions will successfully write to a Chemkin file.
---
 test/data/yaml-ck-reactions.yaml |  9 +++++++++
 test/python/test_convert.py      | 10 ++++++++++
 2 files changed, 19 insertions(+)

diff --git a/test/data/yaml-ck-reactions.yaml b/test/data/yaml-ck-reactions.yaml
index 026afde338..cfb810672d 100644
--- a/test/data/yaml-ck-reactions.yaml
+++ b/test/data/yaml-ck-reactions.yaml
@@ -16,6 +16,15 @@ phases:
   state:
     T: 300.0
     P: 1.01325e+05
+- name: no-reactions
+  thermo: ideal-gas
+  elements: [O, H, Ar]
+  kinetics: gas
+  transport: mixture-averaged
+  reactions: none
+  state:
+    T: 300.0
+    P: 1.01325e+05
     
 species:
 - name: AR
diff --git a/test/python/test_convert.py b/test/python/test_convert.py
index 117d0d9a43..4f184591c2 100644
--- a/test/python/test_convert.py
+++ b/test/python/test_convert.py
@@ -783,6 +783,16 @@ def test_yaml_2_ck_reactions(self):
         self.check_kinetics(ck_phase, yaml_phase, [900, 1800], [2e5, 20e5], tol=2e-7)
         self.check_transport(ck_phase, yaml_phase, [298, 1001, 2400])
 
+    def test_phase_no_reactions(self):
+        input_file = self.test_data_path / "yaml-ck-reactions.yaml"
+        yaml_phase = ct.Solution(input_file, name="no-reactions")
+        assert yaml_phase.n_reactions == 0
+
+        ck_file = self.test_work_path / 'no-reactions.ck'
+        ck_file.unlink(missing_ok=True)
+        yaml_phase.write_chemkin(ck_file, quiet=True)
+        assert ck_file.exists()
+
     def test_write_chemkin(self):
         # test alternative converter
         yaml_phase = ct.Solution('h2o2.yaml')