refactor: Move off UI tests for individual lints

Author: Muscraft

tests/testsuite/lints/implicit_features.rs

@@ -0,0 +1,137 @@
+use cargo_test_support::project;
+use cargo_test_support::registry::Package;
+
+#[cargo_test]
+fn default() {
+    Package::new("bar", "0.1.0").publish();
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+[package]
+name = "foo"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+bar = { version = "0.1.0", optional = true }
+"#,
+        )
+        .file("src/lib.rs", "")
+        .build();
+
+    p.cargo("check -Zcargo-lints")
+        .masquerade_as_nightly_cargo(&["cargo-lints"])
+        .with_stderr(
+            "\
+[UPDATING] [..]
+[LOCKING] 2 packages to latest compatible versions
+[CHECKING] foo v0.1.0 ([CWD])
+[FINISHED] [..]
+",
+        )
+        .run();
+}
+
+#[cargo_test]
+fn warn() {
+    Package::new("bar", "0.1.0").publish();
+    Package::new("baz", "0.1.0").publish();
+    Package::new("target-dep", "0.1.0").publish();
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+[package]
+name = "foo"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+bar = { version = "0.1.0", optional = true }
+
+[build-dependencies]
+baz = { version = "0.1.0", optional = true }
+
+[target.'cfg(target_os = "linux")'.dependencies]
+target-dep = { version = "0.1.0", optional = true }
+
+[lints.cargo]
+implicit_features = "warn"
+"#,
+        )
+        .file("src/lib.rs", "")
+        .build();
+
+    p.cargo("check -Zcargo-lints")
+        .masquerade_as_nightly_cargo(&["cargo-lints"])
+        .with_stderr(
+            "\
+warning: implicit features for optional dependencies is deprecated and will be unavailable in the 2024 edition
+ --> Cargo.toml:8:1
+  |
+8 | bar = { version = \"0.1.0\", optional = true }
+  | ---
+  |
+  = note: `cargo::implicit_features` is set to `warn` in `[lints]`
+warning: implicit features for optional dependencies is deprecated and will be unavailable in the 2024 edition
+  --> Cargo.toml:11:1
+   |
+11 | baz = { version = \"0.1.0\", optional = true }
+   | ---
+   |
+warning: implicit features for optional dependencies is deprecated and will be unavailable in the 2024 edition
+  --> Cargo.toml:14:1
+   |
+14 | target-dep = { version = \"0.1.0\", optional = true }
+   | ----------
+   |
+[UPDATING] [..]
+[LOCKING] 4 packages to latest compatible versions
+[CHECKING] foo v0.1.0 ([CWD])
+[FINISHED] [..]
+",
+        )
+        .run();
+}
+
+#[cargo_test(nightly, reason = "edition2024 is not stable")]
+fn implicit_features_edition_2024() {
+    Package::new("bar", "0.1.0").publish();
+    Package::new("baz", "0.1.0").publish();
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+cargo-features = ["edition2024"]
+[package]
+name = "foo"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+bar = { version = "0.1.0", optional = true }
+baz = { version = "0.1.0", optional = true }
+
+[features]
+baz = ["dep:baz"]
+
+[lints.cargo]
+unused_optional_dependency = "allow"
+"#,
+        )
+        .file("src/lib.rs", "")
+        .build();
+
+    p.cargo("check -Zcargo-lints")
+        .masquerade_as_nightly_cargo(&["cargo-lints", "edition2024"])
+        .with_stderr(
+            "\
+[UPDATING] [..]
+[LOCKING] 2 packages to latest Rust [..] compatible versions
+[CHECKING] foo v0.1.0 ([CWD])
+[FINISHED] [..]
+",
+        )
+        .run();
+}