Auto merge of rust-lang#11560 - y21:ui-toml-tests, r=Alexendoo

Add missing tests for configuration options

I noticed that a lot of lints didn't have test(s) for their configuration. This leads to issues like rust-lang#11481 where the lint just does nothing with it.

This PR adds tests for *almost*[^1] all of the lints with a configuration that didn't have a test in ui-toml.
The tests that I wrote here are usually two cases: one for where it's right above or under the limit set by the config where it shouldn't lint and another one for right above where it should.

changelog: none

[^1]: allow-one-hash-in-raw-strings is ignored by needless_raw_string_hashes

Author: bors

tests/ui-toml/decimal_literal_representation/clippy.toml

@@ -0,0 +1 @@
+literal-representation-threshold = 0xFFFFFF

tests/ui-toml/decimal_literal_representation/decimal_literal_representation.fixed

@@ -0,0 +1,6 @@
+#![warn(clippy::decimal_literal_representation)]
+fn main() {
+    let _ = 8388608;
+    let _ = 0x00FF_FFFF;
+    //~^ ERROR: integer literal has a better hexadecimal representation
+}

tests/ui-toml/decimal_literal_representation/decimal_literal_representation.rs

@@ -0,0 +1,6 @@
+#![warn(clippy::decimal_literal_representation)]
+fn main() {
+    let _ = 8388608;
+    let _ = 16777215;
+    //~^ ERROR: integer literal has a better hexadecimal representation
+}

tests/ui-toml/decimal_literal_representation/decimal_literal_representation.stderr

@@ -0,0 +1,11 @@
+error: integer literal has a better hexadecimal representation
+  --> $DIR/decimal_literal_representation.rs:4:13
+   |
+LL |     let _ = 16777215;
+   |             ^^^^^^^^ help: consider: `0x00FF_FFFF`
+   |
+   = note: `-D clippy::decimal-literal-representation` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::decimal_literal_representation)]`
+
+error: aborting due to previous error
+

tests/ui-toml/disallowed_script_idents/clippy.toml

@@ -0,0 +1 @@
+allowed-scripts = ["Cyrillic"]

tests/ui-toml/disallowed_script_idents/disallowed_script_idents.rs

@@ -0,0 +1,6 @@
+#![warn(clippy::disallowed_script_idents)]
+fn main() {
+    let счётчик = 10;
+    let カウンタ = 10;
+    //~^ ERROR: identifier `カウンタ` has a Unicode script that is not allowed by configuration
+}

tests/ui-toml/disallowed_script_idents/disallowed_script_idents.stderr

@@ -0,0 +1,11 @@
+error: identifier `カウンタ` has a Unicode script that is not allowed by configuration: Katakana
+  --> $DIR/disallowed_script_idents.rs:4:9
+   |
+LL |     let カウンタ = 10;
+   |         ^^^^^^^^
+   |
+   = note: `-D clippy::disallowed-script-idents` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::disallowed_script_idents)]`
+
+error: aborting due to previous error
+

tests/ui-toml/enum_variant_names/clippy.toml

@@ -0,0 +1 @@
+enum-variant-name-threshold = 5

tests/ui-toml/enum_variant_names/enum_variant_names.rs

@@ -0,0 +1,16 @@
+enum Foo {
+    AFoo,
+    BFoo,
+    CFoo,
+    DFoo,
+}
+enum Foo2 {
+    //~^ ERROR: all variants have the same postfix
+    AFoo,
+    BFoo,
+    CFoo,
+    DFoo,
+    EFoo,
+}
+
+fn main() {}

tests/ui-toml/enum_variant_names/enum_variant_names.stderr

@@ -0,0 +1,18 @@
+error: all variants have the same postfix: `Foo`
+  --> $DIR/enum_variant_names.rs:7:1
+   |
+LL | / enum Foo2 {
+LL | |
+LL | |     AFoo,
+LL | |     BFoo,
+...  |
+LL | |     EFoo,
+LL | | }
+   | |_^
+   |
+   = help: remove the postfixes and use full paths to the variants instead of glob imports
+   = note: `-D clippy::enum-variant-names` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::enum_variant_names)]`
+
+error: aborting due to previous error
+

tests/ui-toml/enum_variant_size/clippy.toml

@@ -0,0 +1 @@
+enum-variant-size-threshold = 500

tests/ui-toml/enum_variant_size/enum_variant_size.fixed

@@ -0,0 +1,11 @@
+enum Fine {
+    A(()),
+    B([u8; 500]),
+}
+enum Bad {
+    //~^ ERROR: large size difference between variants
+    A(()),
+    B(Box<[u8; 501]>),
+}
+
+fn main() {}

tests/ui-toml/enum_variant_size/enum_variant_size.rs

@@ -0,0 +1,11 @@
+enum Fine {
+    A(()),
+    B([u8; 500]),
+}
+enum Bad {
+    //~^ ERROR: large size difference between variants
+    A(()),
+    B([u8; 501]),
+}
+
+fn main() {}

tests/ui-toml/enum_variant_size/enum_variant_size.stderr

@@ -0,0 +1,21 @@
+error: large size difference between variants
+  --> $DIR/enum_variant_size.rs:5:1
+   |
+LL | / enum Bad {
+LL | |
+LL | |     A(()),
+   | |     ----- the second-largest variant contains at least 0 bytes
+LL | |     B([u8; 501]),
+   | |     ------------ the largest variant contains at least 501 bytes
+LL | | }
+   | |_^ the entire enum is at least 502 bytes
+   |
+   = note: `-D clippy::large-enum-variant` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::large_enum_variant)]`
+help: consider boxing the large fields to reduce the total size of the enum
+   |
+LL |     B(Box<[u8; 501]>),
+   |       ~~~~~~~~~~~~~~
+
+error: aborting due to previous error
+

tests/ui-toml/explicit_iter_loop/clippy.toml

@@ -0,0 +1 @@
+enforce-iter-loop-reborrow = true

tests/ui-toml/explicit_iter_loop/explicit_iter_loop.fixed

@@ -0,0 +1,10 @@
+#![warn(clippy::explicit_iter_loop)]
+
+fn main() {
+    let mut vec = vec![1, 2, 3];
+    let rmvec = &mut vec;
+    for _ in &*rmvec {}
+    //~^ ERROR: it is more concise to loop over references to containers
+    for _ in &mut *rmvec {}
+    //~^ ERROR: it is more concise to loop over references to containers
+}

tests/ui-toml/explicit_iter_loop/explicit_iter_loop.rs

@@ -0,0 +1,10 @@
+#![warn(clippy::explicit_iter_loop)]
+
+fn main() {
+    let mut vec = vec![1, 2, 3];
+    let rmvec = &mut vec;
+    for _ in rmvec.iter() {}
+    //~^ ERROR: it is more concise to loop over references to containers
+    for _ in rmvec.iter_mut() {}
+    //~^ ERROR: it is more concise to loop over references to containers
+}

tests/ui-toml/explicit_iter_loop/explicit_iter_loop.stderr

@@ -0,0 +1,17 @@
+error: it is more concise to loop over references to containers instead of using explicit iteration methods
+  --> $DIR/explicit_iter_loop.rs:6:14
+   |
+LL |     for _ in rmvec.iter() {}
+   |              ^^^^^^^^^^^^ help: to write this more concisely, try: `&*rmvec`
+   |
+   = note: `-D clippy::explicit-iter-loop` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::explicit_iter_loop)]`
+
+error: it is more concise to loop over references to containers instead of using explicit iteration methods
+  --> $DIR/explicit_iter_loop.rs:8:14
+   |
+LL |     for _ in rmvec.iter_mut() {}
+   |              ^^^^^^^^^^^^^^^^ help: to write this more concisely, try: `&mut *rmvec`
+
+error: aborting due to 2 previous errors
+

tests/ui-toml/large_stack_frames/clippy.toml

@@ -0,0 +1 @@
+stack-size-threshold = 1000

tests/ui-toml/large_stack_frames/large_stack_frames.rs

@@ -0,0 +1,17 @@
+#![warn(clippy::large_stack_frames)]
+
+// We use this helper function instead of writing [0; 4294967297] directly to represent a
+// case that large_stack_arrays can't catch
+fn create_array<const N: usize>() -> [u8; N] {
+    [0; N]
+}
+
+fn f() {
+    let _x = create_array::<1000>();
+}
+fn f2() {
+    //~^ ERROR: this function allocates a large amount of stack space
+    let _x = create_array::<1001>();
+}
+
+fn main() {}

tests/ui-toml/large_stack_frames/large_stack_frames.stderr

@@ -0,0 +1,15 @@
+error: this function allocates a large amount of stack space
+  --> $DIR/large_stack_frames.rs:12:1
+   |
+LL | / fn f2() {
+LL | |
+LL | |     let _x = create_array::<1001>();
+LL | | }
+   | |_^
+   |
+   = note: allocating large amounts of stack space can overflow the stack
+   = note: `-D clippy::large-stack-frames` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::large_stack_frames)]`
+
+error: aborting due to previous error
+

tests/ui-toml/large_types_passed_by_value/clippy.toml

@@ -0,0 +1 @@
+pass-by-value-size-limit = 512

tests/ui-toml/large_types_passed_by_value/large_types_passed_by_value.fixed

@@ -0,0 +1,7 @@
+#![warn(clippy::large_types_passed_by_value)]
+
+fn f(_v: [u8; 512]) {}
+fn f2(_v: &[u8; 513]) {}
+//~^ ERROR: this argument (513 byte) is passed by value
+
+fn main() {}

tests/ui-toml/large_types_passed_by_value/large_types_passed_by_value.rs

@@ -0,0 +1,7 @@
+#![warn(clippy::large_types_passed_by_value)]
+
+fn f(_v: [u8; 512]) {}
+fn f2(_v: [u8; 513]) {}
+//~^ ERROR: this argument (513 byte) is passed by value
+
+fn main() {}

tests/ui-toml/large_types_passed_by_value/large_types_passed_by_value.stderr

@@ -0,0 +1,11 @@
+error: this argument (513 byte) is passed by value, but might be more efficient if passed by reference (limit: 512 byte)
+  --> $DIR/large_types_passed_by_value.rs:4:11
+   |
+LL | fn f2(_v: [u8; 513]) {}
+   |           ^^^^^^^^^ help: consider passing by reference instead: `&[u8; 513]`
+   |
+   = note: `-D clippy::large-types-passed-by-value` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::large_types_passed_by_value)]`
+
+error: aborting due to previous error
+

tests/ui-toml/manual_let_else/clippy.toml

@@ -0,0 +1 @@
+matches-for-let-else = "AllTypes"

tests/ui-toml/manual_let_else/manual_let_else.fixed

@@ -0,0 +1,10 @@
+#![warn(clippy::manual_let_else)]
+
+enum Foo {
+    A(u8),
+    B,
+}
+
+fn main() {
+    let Foo::A(x) = Foo::A(1) else { return };
+}

tests/ui-toml/manual_let_else/manual_let_else.rs

@@ -0,0 +1,14 @@
+#![warn(clippy::manual_let_else)]
+
+enum Foo {
+    A(u8),
+    B,
+}
+
+fn main() {
+    let x = match Foo::A(1) {
+        //~^ ERROR: this could be rewritten as `let...else`
+        Foo::A(x) => x,
+        Foo::B => return,
+    };
+}

tests/ui-toml/manual_let_else/manual_let_else.stderr

@@ -0,0 +1,15 @@
+error: this could be rewritten as `let...else`
+  --> $DIR/manual_let_else.rs:9:5
+   |
+LL | /     let x = match Foo::A(1) {
+LL | |
+LL | |         Foo::A(x) => x,
+LL | |         Foo::B => return,
+LL | |     };
+   | |______^ help: consider writing: `let Foo::A(x) = Foo::A(1) else { return };`
+   |
+   = note: `-D clippy::manual-let-else` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::manual_let_else)]`
+
+error: aborting due to previous error
+

tests/ui-toml/path_ends_with_ext/clippy.toml

@@ -0,0 +1 @@
+allowed-dotfiles = ["dot"]

tests/ui-toml/path_ends_with_ext/path_ends_with_ext.rs

@@ -0,0 +1,9 @@
+#![warn(clippy::path_ends_with_ext)]
+
+use std::path::Path;
+
+fn f(p: &Path) {
+    p.ends_with(".dot");
+}
+
+fn main() {}

tests/ui-toml/result_large_err/clippy.toml

@@ -0,0 +1 @@
+large-error-threshold = 512

tests/ui-toml/result_large_err/result_large_err.rs

@@ -0,0 +1,10 @@
+#![warn(clippy::result_large_err)]
+
+fn f() -> Result<(), [u8; 511]> {
+    todo!()
+}
+fn f2() -> Result<(), [u8; 512]> {
+    //~^ ERROR: the `Err`-variant returned from this function is very large
+    todo!()
+}
+fn main() {}

tests/ui-toml/result_large_err/result_large_err.stderr

@@ -0,0 +1,12 @@
+error: the `Err`-variant returned from this function is very large
+  --> $DIR/result_large_err.rs:6:12
+   |
+LL | fn f2() -> Result<(), [u8; 512]> {
+   |            ^^^^^^^^^^^^^^^^^^^^^ the `Err`-variant is at least 512 bytes
+   |
+   = help: try reducing the size of `[u8; 512]`, for example by boxing large elements or replacing it with `Box<[u8; 512]>`
+   = note: `-D clippy::result-large-err` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::result_large_err)]`
+
+error: aborting due to previous error
+

tests/ui-toml/too_large_for_stack/boxed_local.rs

@@ -0,0 +1,5 @@
+fn f(x: Box<[u8; 500]>) {}
+//~^ ERROR: local variable doesn't need to be boxed here
+fn f2(x: Box<[u8; 501]>) {}
+
+fn main() {}

tests/ui-toml/too_large_for_stack/boxed_local.stderr

@@ -0,0 +1,11 @@
+error: local variable doesn't need to be boxed here
+  --> $DIR/boxed_local.rs:1:6
+   |
+LL | fn f(x: Box<[u8; 500]>) {}
+   |      ^
+   |
+   = note: `-D clippy::boxed-local` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::boxed_local)]`
+
+error: aborting due to previous error
+

tests/ui-toml/too_large_for_stack/clippy.toml

@@ -0,0 +1 @@
+too-large-for-stack = 500

tests/ui-toml/too_large_for_stack/useless_vec.fixed

@@ -0,0 +1,9 @@
+#![warn(clippy::useless_vec)]
+
+fn main() {
+    let x = [0u8; 500];
+    //~^ ERROR: useless use of `vec!`
+    x.contains(&1);
+    let y = vec![0u8; 501];
+    y.contains(&1);
+}

tests/ui-toml/too_large_for_stack/useless_vec.rs

@@ -0,0 +1,9 @@
+#![warn(clippy::useless_vec)]
+
+fn main() {
+    let x = vec![0u8; 500];
+    //~^ ERROR: useless use of `vec!`
+    x.contains(&1);
+    let y = vec![0u8; 501];
+    y.contains(&1);
+}

tests/ui-toml/too_large_for_stack/useless_vec.stderr

@@ -0,0 +1,11 @@
+error: useless use of `vec!`
+  --> $DIR/useless_vec.rs:4:13
+   |
+LL |     let x = vec![0u8; 500];
+   |             ^^^^^^^^^^^^^^ help: you can use an array directly: `[0u8; 500]`
+   |
+   = note: `-D clippy::useless-vec` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::useless_vec)]`
+
+error: aborting due to previous error
+

tests/ui-toml/too_many_arguments/clippy.toml

@@ -0,0 +1 @@
+too-many-arguments-threshold = 10

tests/ui-toml/too_many_arguments/too_many_arguments.rs

@@ -0,0 +1,7 @@
+#![warn(clippy::too_many_arguments)]
+
+fn not_too_many(p1: u8, p2: u8, p3: u8, p4: u8, p5: u8, p6: u8, p7: u8, p8: u8, p9: u8, p10: u8) {}
+fn too_many(p1: u8, p2: u8, p3: u8, p4: u8, p5: u8, p6: u8, p7: u8, p8: u8, p9: u8, p10: u8, p11: u8) {}
+//~^ ERROR: this function has too many arguments
+
+fn main() {}

tests/ui-toml/too_many_arguments/too_many_arguments.stderr

@@ -0,0 +1,11 @@
+error: this function has too many arguments (11/10)
+  --> $DIR/too_many_arguments.rs:4:1
+   |
+LL | fn too_many(p1: u8, p2: u8, p3: u8, p4: u8, p5: u8, p6: u8, p7: u8, p8: u8, p9: u8, p10: u8, p11: u8) {}
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: `-D clippy::too-many-arguments` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::too_many_arguments)]`
+
+error: aborting due to previous error
+