Add file-level safe delete test coverage

Summary:
Add 3 new LSP interaction tests covering file-level safe delete:
- from-import blocking (from target import func)
- unused file in from-import directory (should offer delete)
- relative import blocking (from . import target)

Also add fixture directories with pyrefly.toml configs and Python
source files for each test scenario.

Reviewed By: kinto0

Differential Revision: D94951767

fbshipit-source-id: 40cea1dab2a81eebef69cba6942a218c6ef91b99

Author: jvansch1

pyrefly/lib/test/lsp/lsp_interaction/safe_delete_file.rs

@@ -129,3 +129,134 @@ fn test_safe_delete_file_rejects_usages() {
 
     interaction.shutdown().unwrap();
 }
+
+#[test]
+fn test_safe_delete_file_rejects_from_import() {
+    let root = get_test_files_root();
+    let root_path = root.path().join("safe_delete_file_from_import");
+    let (interaction, _scope_uri) = init_with_delete_support(&root_path);
+
+    let file = "target.py";
+    let file_path = root_path.join(file);
+    let uri = Url::from_file_path(&file_path).unwrap();
+
+    interaction.client.did_open(file);
+    interaction.client.did_open("consumer.py");
+
+    interaction
+        .client
+        .send_request::<CodeActionRequest>(json!({
+            "textDocument": { "uri": uri },
+            "range": {
+                "start": { "line": 0, "character": 0 },
+                "end": { "line": 0, "character": 0 }
+            },
+            "context": { "diagnostics": [] }
+        }))
+        .expect_response_with(|response| {
+            let Some(actions) = response else {
+                return true;
+            };
+            actions.iter().all(|action| {
+                let CodeActionOrCommand::CodeAction(code_action) = action else {
+                    return true;
+                };
+                code_action.title != "Safe delete file `target.py`"
+            })
+        })
+        .unwrap();
+
+    interaction.shutdown().unwrap();
+}
+
+#[test]
+fn test_safe_delete_file_from_import_unused() {
+    let root = get_test_files_root();
+    let root_path = root.path().join("safe_delete_file_from_import");
+    let (interaction, _scope_uri) = init_with_delete_support(&root_path);
+
+    let file = "unused.py";
+    let file_path = root_path.join(file);
+    let uri = Url::from_file_path(&file_path).unwrap();
+
+    interaction.client.did_open(file);
+
+    interaction
+        .client
+        .send_request::<CodeActionRequest>(json!({
+            "textDocument": { "uri": uri },
+            "range": {
+                "start": { "line": 0, "character": 0 },
+                "end": { "line": 0, "character": 0 }
+            },
+            "context": { "diagnostics": [] }
+        }))
+        .expect_response_with(|response| {
+            let Some(actions) = response else {
+                return false;
+            };
+            actions.iter().any(|action| {
+                let CodeActionOrCommand::CodeAction(code_action) = action else {
+                    return false;
+                };
+                if code_action.title != "Safe delete file `unused.py`" {
+                    return false;
+                }
+                let Some(edit) = &code_action.edit else {
+                    return false;
+                };
+                let Some(DocumentChanges::Operations(ops)) = &edit.document_changes else {
+                    return false;
+                };
+                if ops.len() != 1 {
+                    return false;
+                }
+                match &ops[0] {
+                    DocumentChangeOperation::Op(ResourceOp::Delete(delete)) => delete.uri == uri,
+                    _ => false,
+                }
+            })
+        })
+        .unwrap();
+
+    interaction.shutdown().unwrap();
+}
+
+#[test]
+fn test_safe_delete_file_rejects_relative_import() {
+    let root = get_test_files_root();
+    let root_path = root.path().join("safe_delete_file_relative");
+    let (interaction, _scope_uri) = init_with_delete_support(&root_path);
+
+    let file = "pkg/target.py";
+    let file_path = root_path.join(file);
+    let uri = Url::from_file_path(&file_path).unwrap();
+
+    interaction.client.did_open(file);
+    interaction.client.did_open("pkg/consumer.py");
+
+    interaction
+        .client
+        .send_request::<CodeActionRequest>(json!({
+            "textDocument": { "uri": uri },
+            "range": {
+                "start": { "line": 0, "character": 0 },
+                "end": { "line": 0, "character": 0 }
+            },
+            "context": { "diagnostics": [] }
+        }))
+        .expect_response_with(|response| {
+            let Some(actions) = response else {
+                return true;
+            };
+            actions.iter().all(|action| {
+                let CodeActionOrCommand::CodeAction(code_action) = action else {
+                    return true;
+                };
+                code_action.title != "Safe delete file `target.py`"
+            })
+        })
+        .unwrap();
+
+    interaction.shutdown().unwrap();
+}

pyrefly/lib/test/lsp/lsp_interaction/test_files/safe_delete_file_from_import/consumer.py

@@ -0,0 +1,9 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+
+from target import func
+
+func()

pyrefly/lib/test/lsp/lsp_interaction/test_files/safe_delete_file_from_import/pyrefly.toml

@@ -0,0 +1 @@
+search_path = ["."]

pyrefly/lib/test/lsp/lsp_interaction/test_files/safe_delete_file_from_import/target.py

@@ -0,0 +1,8 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+
+def func() -> int:
+    return 1

pyrefly/lib/test/lsp/lsp_interaction/test_files/safe_delete_file_from_import/unused.py

@@ -0,0 +1,8 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+
+def bar() -> int:
+    return 1

pyrefly/lib/test/lsp/lsp_interaction/test_files/safe_delete_file_relative/pkg/__init__.py

@@ -0,0 +1,5 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+

pyrefly/lib/test/lsp/lsp_interaction/test_files/safe_delete_file_relative/pkg/consumer.py

@@ -0,0 +1,9 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+
+from . import target
+
+target.func()

pyrefly/lib/test/lsp/lsp_interaction/test_files/safe_delete_file_relative/pkg/target.py

@@ -0,0 +1,8 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+
+def func() -> int:
+    return 1

pyrefly/lib/test/lsp/lsp_interaction/test_files/safe_delete_file_relative/pyrefly.toml

@@ -0,0 +1 @@
+search_path = ["."]