Add more tests for check-cfg lint sub-config

tests/testsuite/check_cfg.rs

@@ -521,6 +521,81 @@ fn lint_table_config() {
         .run();
 }
 
+#[cargo_test(>=1.79, reason = "--check-cfg was stabilized in Rust 1.79")]
+fn lint_table_config_and_features() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo"
+                version = "0.1.0"
+                edition = "2015"
+
+                [features]
+                my_feature = []
+                alloc = []
+
+                [lints.rust]
+                unexpected_cfgs = { level = "warn", check-cfg = ["cfg(has_foo)", "cfg(has_bar, values(\"yes\", \"no\"))"] }
+            "#,
+        )
+        .file("src/main.rs", "fn main() {}")
+        .build();
+
+    p.cargo("check -v")
+        .with_stderr_contains(x!("rustc" => "cfg" of "has_foo"))
+        .with_stderr_contains(x!("rustc" => "cfg" of "has_bar" with "yes" "no"))
+        .with_stderr_contains(x!("rustc" => "cfg" of "feature" with "alloc" "my_feature"))
+        .run();
+}
+
+#[cargo_test(>=1.79, reason = "--check-cfg was stabilized in Rust 1.79")]
+fn lint_table_config_doc() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo"
+                version = "0.1.0"
+                edition = "2015"
+
+                [lints.rust]
+                unexpected_cfgs = { check-cfg = ["cfg(has_foo)"] }
+            "#,
+        )
+        .file("src/main.rs", "fn main() {}")
+        .build();
+
+    p.cargo("doc -v")
+        .with_stderr_contains(x!("rustdoc" => "cfg" of "has_foo"))
+        .run();
+}
+
+#[cargo_test(>=1.79, reason = "--check-cfg was stabilized in Rust 1.79")]
+fn lint_table_config_test() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo"
+                version = "0.1.0"
+                edition = "2015"
+
+                [lints.rust]
+                unexpected_cfgs = { check-cfg = ["cfg(has_foo)"] }
+            "#,
+        )
+        .file("src/main.rs", "fn main() {}")
+        .build();
+
+    p.cargo("test -v")
+        .with_stderr_contains(x!("rustc" => "cfg" of "has_foo"))
+        .run();
+}
+
 #[cargo_test(>=1.79, reason = "--check-cfg was stabilized in Rust 1.79")]
 fn lint_table_config_without_level() {
     let p = project()