chore: import upstream snapshot with attribution

python/mirage/workspace/node/test_expr.py

@@ -0,0 +1,68 @@
+# ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
+
+from mirage.shell.types import NodeType as NT
+from mirage.workspace.expand import expand_node
+
+
+async def expand_test_expr(node, session, execute_fn, cs, registry):
+    """Expand test_command [ ... ] into a flat list of strings."""
+    result = []
+    for child in node.named_children:
+        if child.type == NT.BINARY_EXPRESSION:
+            for part in child.children:
+                if part.type in ("=", "!=", "=="):
+                    result.append(part.text.decode())
+                elif part.is_named:
+                    exp = await expand_node(part, session, execute_fn, cs)
+                    result.append(exp)
+        elif child.type == NT.UNARY_EXPRESSION:
+            for part in child.children:
+                if part.type == NT.TEST_OPERATOR:
+                    result.append(part.text.decode())
+                elif part.is_named:
+                    exp = await expand_node(part, session, execute_fn, cs)
+                    result.append(exp)
+        elif child.type == NT.NEGATION_EXPRESSION:
+            result.append("!")
+            for part in child.named_children:
+                sub = await _expand_inner(part, session, execute_fn, cs)
+                result.extend(sub)
+        else:
+            exp = await expand_node(child, session, execute_fn, cs)
+            result.append(exp)
+    return result
+
+
+async def _expand_inner(node, session, execute_fn, cs):
+    """Expand a single test expression node into args."""
+    result = []
+    if node.type == NT.BINARY_EXPRESSION:
+        for part in node.children:
+            if part.type in ("=", "!=", "=="):
+                result.append(part.text.decode())
+            elif part.is_named:
+                exp = await expand_node(part, session, execute_fn, cs)
+                result.append(exp)
+    elif node.type == NT.UNARY_EXPRESSION:
+        for part in node.children:
+            if part.type == NT.TEST_OPERATOR:
+                result.append(part.text.decode())
+            elif part.is_named:
+                exp = await expand_node(part, session, execute_fn, cs)
+                result.append(exp)
+    else:
+        exp = await expand_node(node, session, execute_fn, cs)
+        result.append(exp)
+    return result