add uitests for cargo rust-version field

tests/ui-cargo/cargo_rust_version/fail_both_diff/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "fail-both-diff"
+version = "0.1.0"
+rust-version = "1.56"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

tests/ui-cargo/cargo_rust_version/fail_both_diff/clippy.toml

@@ -0,0 +1 @@
+msrv = "1.59"

tests/ui-cargo/cargo_rust_version/fail_both_diff/src/main.rs

@@ -0,0 +1,11 @@
+#![deny(clippy::use_self)]
+
+pub struct Foo;
+
+impl Foo {
+    pub fn bar() -> Foo {
+        Foo
+    }
+}
+
+fn main() {}

tests/ui-cargo/cargo_rust_version/fail_both_diff/src/main.stderr

@@ -0,0 +1,16 @@
+warning: the MSRV in `clippy.toml` and `Cargo.toml` differ; using `1.59.0` from `clippy.toml`
+
+error: unnecessary structure name repetition
+  --> $DIR/main.rs:6:21
+   |
+LL |     pub fn bar() -> Foo {
+   |                     ^^^ help: use the applicable keyword: `Self`
+   |
+note: the lint level is defined here
+  --> $DIR/main.rs:1:9
+   |
+LL | #![deny(clippy::use_self)]
+   |         ^^^^^^^^^^^^^^^^
+
+error: aborting due to previous error; 1 warning emitted
+

tests/ui-cargo/cargo_rust_version/fail_both_same/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "fail-both-same"
+version = "0.1.0"
+rust-version = "1.57.0"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

tests/ui-cargo/cargo_rust_version/fail_both_same/clippy.toml

@@ -0,0 +1 @@
+msrv = "1.57"

tests/ui-cargo/cargo_rust_version/fail_both_same/src/main.rs

@@ -0,0 +1,11 @@
+#![deny(clippy::use_self)]
+
+pub struct Foo;
+
+impl Foo {
+    pub fn bar() -> Foo {
+        Foo
+    }
+}
+
+fn main() {}

tests/ui-cargo/cargo_rust_version/fail_both_same/src/main.stderr

@@ -0,0 +1,14 @@
+error: unnecessary structure name repetition
+  --> $DIR/main.rs:6:21
+   |
+LL |     pub fn bar() -> Foo {
+   |                     ^^^ help: use the applicable keyword: `Self`
+   |
+note: the lint level is defined here
+  --> $DIR/main.rs:1:9
+   |
+LL | #![deny(clippy::use_self)]
+   |         ^^^^^^^^^^^^^^^^
+
+error: aborting due to previous error
+

tests/ui-cargo/cargo_rust_version/fail_cargo/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "fail-cargo"
+version = "0.1.0"
+rust-version = "1.56.1"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

tests/ui-cargo/cargo_rust_version/fail_cargo/src/main.rs

@@ -0,0 +1,11 @@
+#![deny(clippy::use_self)]
+
+pub struct Foo;
+
+impl Foo {
+    pub fn bar() -> Foo {
+        Foo
+    }
+}
+
+fn main() {}

tests/ui-cargo/cargo_rust_version/fail_cargo/src/main.stderr

@@ -0,0 +1,14 @@
+error: unnecessary structure name repetition
+  --> $DIR/main.rs:6:21
+   |
+LL |     pub fn bar() -> Foo {
+   |                     ^^^ help: use the applicable keyword: `Self`
+   |
+note: the lint level is defined here
+  --> $DIR/main.rs:1:9
+   |
+LL | #![deny(clippy::use_self)]
+   |         ^^^^^^^^^^^^^^^^
+
+error: aborting due to previous error
+

tests/ui-cargo/cargo_rust_version/fail_clippy/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "fail-clippy"
+version = "0.1.0"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

tests/ui-cargo/cargo_rust_version/fail_clippy/clippy.toml

@@ -0,0 +1 @@
+msrv = "1.58"

tests/ui-cargo/cargo_rust_version/fail_clippy/src/main.rs

@@ -0,0 +1,11 @@
+#![deny(clippy::use_self)]
+
+pub struct Foo;
+
+impl Foo {
+    pub fn bar() -> Foo {
+        Foo
+    }
+}
+
+fn main() {}

tests/ui-cargo/cargo_rust_version/fail_clippy/src/main.stderr

@@ -0,0 +1,14 @@
+error: unnecessary structure name repetition
+  --> $DIR/main.rs:6:21
+   |
+LL |     pub fn bar() -> Foo {
+   |                     ^^^ help: use the applicable keyword: `Self`
+   |
+note: the lint level is defined here
+  --> $DIR/main.rs:1:9
+   |
+LL | #![deny(clippy::use_self)]
+   |         ^^^^^^^^^^^^^^^^
+
+error: aborting due to previous error
+

tests/ui-cargo/cargo_rust_version/fail_file_attr/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "fail-file-attr"
+version = "0.1.0"
+rust-version = "1.13"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

tests/ui-cargo/cargo_rust_version/fail_file_attr/clippy.toml

@@ -0,0 +1 @@
+msrv = "1.13.0"

tests/ui-cargo/cargo_rust_version/fail_file_attr/src/main.rs

@@ -0,0 +1,16 @@
+// FIXME: this should produce a warning, because the attribute says 1.58 and the cargo.toml file
+// says 1.13
+
+#![feature(custom_inner_attributes)]
+#![clippy::msrv = "1.58.0"]
+#![deny(clippy::use_self)]
+
+pub struct Foo;
+
+impl Foo {
+    pub fn bar() -> Foo {
+        Foo
+    }
+}
+
+fn main() {}

tests/ui-cargo/cargo_rust_version/fail_file_attr/src/main.stderr

@@ -0,0 +1,14 @@
+error: unnecessary structure name repetition
+  --> $DIR/main.rs:11:21
+   |
+LL |     pub fn bar() -> Foo {
+   |                     ^^^ help: use the applicable keyword: `Self`
+   |
+note: the lint level is defined here
+  --> $DIR/main.rs:6:9
+   |
+LL | #![deny(clippy::use_self)]
+   |         ^^^^^^^^^^^^^^^^
+
+error: aborting due to previous error
+

tests/ui-cargo/cargo_rust_version/pass_both_same/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "fail-both-same"
+version = "0.1.0"
+rust-version = "1.13.0"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

tests/ui-cargo/cargo_rust_version/pass_both_same/clippy.toml

@@ -0,0 +1 @@
+msrv = "1.13"

tests/ui-cargo/cargo_rust_version/pass_both_same/src/main.rs

@@ -0,0 +1,11 @@
+#![deny(clippy::use_self)]
+
+pub struct Foo;
+
+impl Foo {
+    pub fn bar() -> Foo {
+        Foo
+    }
+}
+
+fn main() {}

tests/ui-cargo/cargo_rust_version/pass_cargo/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "fail-cargo"
+version = "0.1.0"
+rust-version = "1.13.0"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

tests/ui-cargo/cargo_rust_version/pass_cargo/src/main.rs

@@ -0,0 +1,11 @@
+#![deny(clippy::use_self)]
+
+pub struct Foo;
+
+impl Foo {
+    pub fn bar() -> Foo {
+        Foo
+    }
+}
+
+fn main() {}

tests/ui-cargo/cargo_rust_version/pass_clippy/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "fail-clippy"
+version = "0.1.0"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

tests/ui-cargo/cargo_rust_version/pass_clippy/clippy.toml

@@ -0,0 +1 @@
+msrv = "1.13"

tests/ui-cargo/cargo_rust_version/pass_clippy/src/main.rs

@@ -0,0 +1,11 @@
+#![deny(clippy::use_self)]
+
+pub struct Foo;
+
+impl Foo {
+    pub fn bar() -> Foo {
+        Foo
+    }
+}
+
+fn main() {}

tests/ui-cargo/cargo_rust_version/pass_file_attr/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "fail-file-attr"
+version = "0.1.0"
+rust-version = "1.59"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

tests/ui-cargo/cargo_rust_version/pass_file_attr/src/main.rs

@@ -0,0 +1,13 @@
+#![feature(custom_inner_attributes)]
+#![clippy::msrv = "1.13.0"]
+#![deny(clippy::use_self)]
+
+pub struct Foo;
+
+impl Foo {
+    pub fn bar() -> Foo {
+        Foo
+    }
+}
+
+fn main() {}

tests/ui-cargo/cargo_rust_version/warn_both_diff/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "warn-both-diff"
+version = "0.1.0"
+rust-version = "1.56.0"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

tests/ui-cargo/cargo_rust_version/warn_both_diff/clippy.toml

@@ -0,0 +1 @@
+msrv = "1.13"

tests/ui-cargo/cargo_rust_version/warn_both_diff/src/main.rs

@@ -0,0 +1,11 @@
+#![deny(clippy::use_self)]
+
+pub struct Foo;
+
+impl Foo {
+    pub fn bar() -> Foo {
+        Foo
+    }
+}
+
+fn main() {}

tests/ui-cargo/cargo_rust_version/warn_both_diff/src/main.stderr

@@ -0,0 +1,4 @@
+warning: the MSRV in `clippy.toml` and `Cargo.toml` differ; using `1.13.0` from `clippy.toml`
+
+warning: 1 warning emitted
+