Fix tests, only lint for public tests

tests/ui-toml/impl_trait_in_params/clippy.toml

@@ -0,0 +1 @@
+avoid-breaking-exported-api = false

tests/ui-toml/impl_trait_in_params/impl_trait_in_params.rs

@@ -0,0 +1,16 @@
+//! As avoid-breaking-exported-api is `false`, nothing here should lint
+#![warn(clippy::impl_trait_in_params)]
+#![no_main]
+//@no-rustfix
+
+pub trait Trait {}
+
+trait Private {
+    fn t(_: impl Trait);
+    fn tt<T: Trait>(_: T);
+}
+
+pub trait Public {
+    fn t(_: impl Trait); //~ ERROR: `impl Trait` used as a function parameter
+    fn tt<T: Trait>(_: T);
+}

tests/ui-toml/impl_trait_in_params/impl_trait_in_params.stderr

@@ -0,0 +1,15 @@
+error: `impl Trait` used as a function parameter
+  --> $DIR/impl_trait_in_params.rs:14:13
+   |
+LL |     fn t(_: impl Trait);
+   |             ^^^^^^^^^^
+   |
+   = note: `-D clippy::impl-trait-in-params` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::impl_trait_in_params)]`
+help: add a type parameter
+   |
+LL |     fn t<{ /* Generic name */ }: Trait>(_: impl Trait);
+   |         +++++++++++++++++++++++++++++++
+
+error: aborting due to previous error
+

tests/ui-toml/impl_trait_in_params/true/clippy.toml

@@ -1 +0,0 @@
-avoid-breaking-exported-api = true

tests/ui-toml/impl_trait_in_params/true/impl_trait_in_params.rs

@@ -1,10 +0,0 @@
-//! As avoid-breaking-exported-api is `true`, nothing here should lint
-#![warn(clippy::impl_trait_in_params)]
-#![no_main]
-
-trait Trait {}
-
-trait T {
-    fn t(_: impl Trait);
-    fn tt<T: Trait>(_: T);
-}

tests/ui/impl_trait_in_params.rs

@@ -19,8 +19,14 @@ fn d(_: impl AnotherTrait<u32>) {}
 
 //------ IMPLS
 
-trait T {
-    // See test in ui-toml for a case where avoid-breaking-exported-api is set to true
+pub trait Public {
+    // See test in ui-toml for a case where avoid-breaking-exported-api is set to false
+    fn t(_: impl Trait);
+    fn tt<T: Trait>(_: T) {}
+}
+
+trait Private {
+    // This shouldn't lint
     fn t(_: impl Trait);
     fn tt<T: Trait>(_: T) {}
 }
@@ -34,7 +40,7 @@ impl S {
 }
 
 // Trying with traits
-impl T for S {
+impl Public for S {
     fn t(_: impl Trait) {}
 }
 

tests/ui/impl_trait_in_params.stderr

@@ -23,7 +23,7 @@ LL | pub fn c<C: Trait, { /* Generic name */ }: Trait>(_: C, _: impl Trait) {}
    |                  +++++++++++++++++++++++++++++++
 
 error: `impl Trait` used as a function parameter
-  --> $DIR/impl_trait_in_params.rs:30:17
+  --> $DIR/impl_trait_in_params.rs:36:17
    |
 LL |     pub fn h(_: impl Trait) {}
    |                 ^^^^^^^^^^
@@ -34,7 +34,7 @@ LL |     pub fn h<{ /* Generic name */ }: Trait>(_: impl Trait) {}
    |             +++++++++++++++++++++++++++++++
 
 error: `impl Trait` used as a function parameter
-  --> $DIR/impl_trait_in_params.rs:33:45
+  --> $DIR/impl_trait_in_params.rs:39:45
    |
 LL |     pub fn k<K: AnotherTrait<u32>>(_: K, _: impl AnotherTrait<u32>) {}
    |                                             ^^^^^^^^^^^^^^^^^^^^^^