tests/format/assertion.py: Added tests for the (!) assertion directive

tests/format/assertion.py

+import os
+import pytest
+from buildstream import _yaml
+from buildstream import LoadError, LoadErrorReason
+from tests.testutils.runcli import cli
+
+# Project directory
+DATA_DIR = os.path.join(
+    os.path.dirname(os.path.realpath(__file__)),
+    'assertion'
+)
+
+
+@pytest.mark.datafiles(DATA_DIR)
+@pytest.mark.parametrize("target,opt_pony,opt_horsy,assertion", [
+    # Test an unconditional (!) directly in the element
+    ('raw-assertion.bst', 'False', 'False', 'Raw assertion boogey'),
+    # Test an assertion in a conditional
+    ('conditional-assertion.bst', 'True', 'False', "It's not pony time yet"),
+    # Test that we get the first composited assertion
+    ('ordered-assertion.bst', 'True', 'True', "It's not horsy time yet"),
+])
+def test_assertion_cli(cli, datafiles, target, opt_pony, opt_horsy, assertion):
+    project = os.path.join(datafiles.dirname, datafiles.basename)
+    result = cli.run(project=project, silent=True, args=[
+        '--option', 'pony', opt_pony,
+        '--option', 'horsy', opt_horsy,
+        'show',
+        '--deps', 'none',
+        '--format', '%{vars}',
+        target])
+
+    assert result.exit_code != 0
+    assert result.exception
+    assert isinstance(result.exception, LoadError)
+    assert result.exception.reason == LoadErrorReason.USER_ASSERTION
+
+    # Assert that the assertion text provided by the user
+    # is found in the exception text
+    assert assertion in str(result.exception)

tests/format/assertion/conditional-assertion.bst

+kind: autotools
+variables:
+  thepony: "not pony"
+  (?):
+  - pony == True:
+      thepony: "It's a ponay !"
+      (!): It's not pony time yet

tests/format/assertion/ordered-assertion.bst

+kind: autotools
+variables:
+  thepony: "not pony"
+  (?):
+  - pony == True:
+      thepony: "It's a ponay !"
+      (!): It's not pony time yet
+  - horsy == True:
+      thepony: "It's a horsay !"
+      (!): It's not horsy time yet

tests/format/assertion/project.conf

+name: test
+
+options:
+  pony:
+    type: bool
+    description: Whether a pony or not
+    default: False
+  horsy:
+    type: bool
+    description: Whether a horsy or not
+    default: False

tests/format/assertion/raw-assertion.bst

+kind: autotools
+variables:
+  thepony: "not pony"
+  (!): |
+
+    Raw assertion boogey