test: Show open-namespaces behavior

tests/testsuite/main.rs

@@ -127,6 +127,7 @@ mod net_config;
 mod new;
 mod offline;
 mod old_cargos;
+mod open_namespaces;
 mod out_dir;
 mod owner;
 mod package;

tests/testsuite/open_namespaces.rs

@@ -0,0 +1,244 @@
+use cargo_test_support::project;
+use cargo_test_support::registry::RegistryBuilder;
+
+#[cargo_test]
+fn within_namespace_requires_feature() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo::bar"
+                version = "0.0.1"
+                edition = "2015"
+            "#,
+        )
+        .file("src/lib.rs", "")
+        .build();
+
+    p.cargo("read-manifest")
+        .masquerade_as_nightly_cargo(&["open-namespaces"])
+        .with_status(101)
+        .with_stderr(
+            "\
+[ERROR] invalid character `:` in package name: `foo::bar`, characters must be Unicode XID characters (numbers, `-`, `_`, or most letters)
+ --> Cargo.toml:3:24
+  |
+3 |                 name = \"foo::bar\"
+  |                        ^^^^^^^^^^
+  |
+",
+        )
+        .run()
+}
+
+#[cargo_test]
+fn implicit_lib_within_namespace() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                cargo-features = ["open-namespaces"]
+
+                [package]
+                name = "foo::bar"
+                version = "0.0.1"
+                edition = "2015"
+            "#,
+        )
+        .file("src/lib.rs", "")
+        .build();
+
+    p.cargo("read-manifest")
+        .masquerade_as_nightly_cargo(&["open-namespaces"])
+        .with_status(101)
+        .with_stderr(
+            "\
+[ERROR] invalid character `:` in package name: `foo::bar`, characters must be Unicode XID characters (numbers, `-`, `_`, or most letters)
+ --> Cargo.toml:5:24
+  |
+5 |                 name = \"foo::bar\"
+  |                        ^^^^^^^^^^
+  |
+",
+        )
+        .run()
+}
+
+#[cargo_test]
+fn implicit_bin_within_namespace() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                cargo-features = ["open-namespaces"]
+
+                [package]
+                name = "foo::bar"
+                version = "0.0.1"
+                edition = "2015"
+            "#,
+        )
+        .file("src/main.rs", "fn main() {}")
+        .build();
+
+    p.cargo("read-manifest")
+        .masquerade_as_nightly_cargo(&["open-namespaces"])
+        .with_status(101)
+        .with_stderr(
+            "\
+[ERROR] invalid character `:` in package name: `foo::bar`, characters must be Unicode XID characters (numbers, `-`, `_`, or most letters)
+ --> Cargo.toml:5:24
+  |
+5 |                 name = \"foo::bar\"
+  |                        ^^^^^^^^^^
+  |
+",
+        )
+        .run()
+}
+
+#[cargo_test]
+fn explicit_bin_within_namespace() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                cargo-features = ["open-namespaces"]
+
+                [package]
+                name = "foo::bar"
+                version = "0.0.1"
+                edition = "2015"
+
+                [[bin]]
+                name = "foo-bar"
+            "#,
+        )
+        .file("src/lib.rs", "")
+        .file("src/foo-bar/main.rs", "fn main() {}")
+        .build();
+
+    p.cargo("read-manifest")
+        .masquerade_as_nightly_cargo(&["open-namespaces"])
+        .with_status(101)
+        .with_stderr(
+            "\
+[ERROR] invalid character `:` in package name: `foo::bar`, characters must be Unicode XID characters (numbers, `-`, `_`, or most letters)
+ --> Cargo.toml:5:24
+  |
+5 |                 name = \"foo::bar\"
+  |                        ^^^^^^^^^^
+  |
+",
+        )
+        .run()
+}
+
+#[cargo_test]
+#[cfg(unix)]
+fn namespaced_script_name() {
+    let p = cargo_test_support::project()
+        .file(
+            "foo::bar.rs",
+            r#"---
+cargo-features = ["open-namespaces"]
+package.edition = "2021"
+---
+
+fn main() {}
+"#,
+        )
+        .build();
+
+    p.cargo("read-manifest -Zscript --manifest-path foo::bar.rs")
+        .masquerade_as_nightly_cargo(&["script", "open-namespaces"])
+        .with_json(
+            r#"{
+  "authors": [],
+  "categories": [],
+  "default_run": null,
+  "dependencies": [],
+  "description": null,
+  "documentation": null,
+  "edition": "2021",
+  "features": {},
+  "homepage": null,
+  "id": "path+file://[..]#foo--bar@0.0.0",
+  "keywords": [],
+  "license": null,
+  "license_file": null,
+  "links": null,
+  "manifest_path": "[CWD]/foo::bar.rs",
+  "metadata": null,
+  "name": "foo--bar",
+  "publish": [],
+  "readme": null,
+  "repository": null,
+  "rust_version": null,
+  "source": null,
+  "targets": [
+    {
+      "crate_types": [
+        "bin"
+      ],
+      "doc": true,
+      "doctest": false,
+      "edition": "2021",
+      "kind": [
+        "bin"
+      ],
+      "name": "foo--bar",
+      "src_path": "[..]/foo::bar.rs",
+      "test": true
+    }
+  ],
+  "version": "0.0.0"
+}
+"#,
+        )
+        .with_stderr(
+            "\
+",
+        )
+        .run();
+}
+
+#[cargo_test]
+fn publish_namespaced() {
+    let registry = RegistryBuilder::new().http_api().http_index().build();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                cargo-features = ["open-namespaces"]
+
+                [package]
+                name = "foo::bar"
+                version = "0.0.1"
+                edition = "2015"
+                authors = []
+                license = "MIT"
+                description = "foo"
+            "#,
+        )
+        .file("src/lib.rs", "fn main() {}")
+        .build();
+
+    p.cargo("publish")
+        .masquerade_as_nightly_cargo(&["script", "open-namespaces"])
+        .replace_crates_io(registry.index_url())
+        .with_status(101)
+        .with_stderr(
+            "\
+[ERROR] invalid character `:` in package name: `foo::bar`, characters must be Unicode XID characters (numbers, `-`, `_`, or most letters)
+ --> Cargo.toml:5:24
+  |
+5 |                 name = \"foo::bar\"
+  |                        ^^^^^^^^^^
+  |
+",
+        )
+        .run();
+}