Add detect_workspace_inherit_public test case.

tests/testsuite/cargo_add/detect_workspace_inherit_public/in/Cargo.toml

@@ -0,0 +1,5 @@
+[workspace]
+members = ["primary", "dependency"]
+
+[workspace.dependencies]
+foo = { version = "0.0.0", path = "./dependency"}

tests/testsuite/cargo_add/detect_workspace_inherit_public/in/dependency/Cargo.toml

@@ -0,0 +1,3 @@
+[package]
+name = "foo"
+version = "0.0.0"

tests/testsuite/cargo_add/detect_workspace_inherit_public/in/primary/Cargo.toml

@@ -0,0 +1,4 @@
+cargo-features = ["public-dependency"]
+[package]
+name = "bar"
+version = "0.0.0"

tests/testsuite/cargo_add/detect_workspace_inherit_public/mod.rs

@@ -0,0 +1,26 @@
+use cargo_test_support::compare::assert_ui;
+use cargo_test_support::prelude::*;
+use cargo_test_support::Project;
+
+use cargo_test_support::curr_dir;
+
+#[cargo_test]
+fn case() {
+    cargo_test_support::registry::init();
+
+    let project = Project::from_template(curr_dir!().join("in"));
+    let project_root = project.root();
+    let cwd = &project_root;
+
+    snapbox::cmd::Command::cargo_ui()
+        .arg("add")
+        .args(["foo", "-p", "bar", "--public"])
+        .masquerade_as_nightly_cargo(&["public-dependency"])
+        .current_dir(cwd)
+        .assert()
+        .success()
+        .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_add/detect_workspace_inherit_public/out/Cargo.toml

@@ -0,0 +1,5 @@
+[workspace]
+members = ["primary", "dependency"]
+
+[workspace.dependencies]
+foo = { version = "0.0.0", path = "./dependency"}

tests/testsuite/cargo_add/detect_workspace_inherit_public/out/dependency/Cargo.toml

@@ -0,0 +1,3 @@
+[package]
+name = "foo"
+version = "0.0.0"

tests/testsuite/cargo_add/detect_workspace_inherit_public/out/primary/Cargo.toml

@@ -0,0 +1,7 @@
+cargo-features = ["public-dependency"]
+[package]
+name = "bar"
+version = "0.0.0"
+
+[dependencies]
+foo = { workspace = true, public = true }

tests/testsuite/cargo_add/detect_workspace_inherit_public/stderr.log

@@ -0,0 +1 @@
+      Adding foo (workspace) to public dependencies.

tests/testsuite/cargo_add/mod.rs

@@ -12,6 +12,7 @@ mod deprecated_section;
 mod detect_workspace_inherit;
 mod detect_workspace_inherit_features;
 mod detect_workspace_inherit_optional;
+mod detect_workspace_inherit_public;
 mod dev;
 mod dev_build_conflict;
 mod dev_prefer_existing_version;