tests/format: Test proper failure of reference to undefined options

When using an undefined option in a conditional expression, buildstream
should error out and print a good message about it.

3 files changed, 29 insertions, 0 deletions

diff --git a/tests/format/options.py b/tests/format/options.py
index dfc2b8340..5cb01622c 100644
--- a/tests/format/options.py
+++ b/tests/format/options.py
@@ -83,6 +83,21 @@ def test_invalid_expression(cli, datafiles):
 
 
 @pytest.mark.datafiles(DATA_DIR)
+def test_undefined(cli, datafiles):
+    project = os.path.join(datafiles.dirname, datafiles.basename, 'undefined-variable')
+    result = cli.run(project=project, silent=True, args=[
+        'show',
+        '--deps', 'none',
+        '--format', '%{vars}',
+        'element.bst'])
+
+    assert result.exit_code != 0
+    assert result.exception
+    assert isinstance(result.exception, LoadError)
+    assert result.exception.reason == LoadErrorReason.EXPRESSION_FAILED
+
+
+@pytest.mark.datafiles(DATA_DIR)
 def test_invalid_condition(cli, datafiles):
     project = os.path.join(datafiles.dirname, datafiles.basename, 'invalid-condition')
     result = cli.run(project=project, silent=True, args=[
diff --git a/tests/format/options/undefined-variable/element.bst b/tests/format/options/undefined-variable/element.bst
new file mode 100644
index 000000000..e006c8a96
--- /dev/null
+++ b/tests/format/options/undefined-variable/element.bst
@@ -0,0 +1,2 @@
+kind: autotools
+
diff --git a/tests/format/options/undefined-variable/project.conf b/tests/format/options/undefined-variable/project.conf
new file mode 100644
index 000000000..d634ef0a4
--- /dev/null
+++ b/tests/format/options/undefined-variable/project.conf
@@ -0,0 +1,12 @@
+name: test
+
+options:
+  pony:
+    type: bool
+    description: Whether a pony
+    default: False
+
+variables:
+  (?):
+  - pony == foo:
+      prefix: "/opt"