chore: add passing test

tests/testsuite/cargo_remove/gc_keep_used_patch/in/Cargo.toml

@@ -0,0 +1,8 @@
+# Cargo.toml
+
+[workspace]
+members = ["serde", "serde_derive"]
+
+[patch.crates-io]
+serde = { path = "serde" }
+

tests/testsuite/cargo_remove/gc_keep_used_patch/in/serde/Cargo.toml

@@ -0,0 +1,9 @@
+# serde/Cargo.toml
+
+[package]
+name = "serde"
+version = "1.0.0"
+
+[dependencies]
+serde_derive = { path = "../serde_derive" }
+

tests/testsuite/cargo_remove/gc_keep_used_patch/in/serde_derive/Cargo.toml

@@ -0,0 +1,8 @@
+# serde_derive/Cargo.toml
+
+[package]
+name = "serde_derive"
+version = "1.0.0"
+
+[dev-dependencies]
+serde_json = "1.0.0"

tests/testsuite/cargo_remove/gc_keep_used_patch/mod.rs

@@ -0,0 +1,27 @@
+use cargo_test_support::compare::assert_ui;
+use cargo_test_support::curr_dir;
+use cargo_test_support::CargoCommand;
+use cargo_test_support::Project;
+
+#[cargo_test]
+fn case() {
+    cargo_test_support::registry::init();
+    cargo_test_support::registry::Package::new("serde", "1.0.0").publish();
+    cargo_test_support::registry::Package::new("serde_json", "1.0.0")
+        .dep("serde", "1.0.0")
+        .publish();
+
+    let project = Project::from_template(curr_dir!().join("in"));
+    let project_root = project.root();
+
+    snapbox::cmd::Command::cargo_ui()
+        .current_dir(&project_root)
+        .arg("remove")
+        .args(["--package", "serde", "serde_derive"])
+        .assert()
+        .code(0)
+        .stdout_matches_path(curr_dir!().join("stdout.log"))
+        .stderr_matches_path(curr_dir!().join("stderr.log"));
+
+    assert_ui().subset_matches(curr_dir!().join("out"), &project_root);
+}

tests/testsuite/cargo_remove/gc_keep_used_patch/out/Cargo.toml

@@ -0,0 +1,5 @@
+# Cargo.toml
+
+[workspace]
+members = ["serde", "serde_derive"]
+

tests/testsuite/cargo_remove/gc_keep_used_patch/out/serde/Cargo.toml

@@ -0,0 +1,6 @@
+# serde/Cargo.toml
+
+[package]
+name = "serde"
+version = "1.0.0"
+

tests/testsuite/cargo_remove/gc_keep_used_patch/out/serde_derive/Cargo.toml

@@ -0,0 +1,8 @@
+# serde_derive/Cargo.toml
+
+[package]
+name = "serde_derive"
+version = "1.0.0"
+
+[dev-dependencies]
+serde_json = "1.0.0"

tests/testsuite/cargo_remove/gc_keep_used_patch/stderr.log

@@ -0,0 +1,2 @@
+    Removing serde_derive from dependencies
+    Updating `dummy-registry` index

tests/testsuite/cargo_remove/mod.rs

@@ -2,6 +2,7 @@ mod avoid_empty_tables;
 mod build;
 mod dev;
 mod dry_run;
+mod gc_keep_used_patch;
 mod gc_patch;
 mod gc_profile;
 mod gc_replace;