Make CI check format of UI tests (#534)

* [ci] Check format of UI tests as well

* [lang] Apply our formatting guidelines to UI tests

* [ci] Make Gitlab happy

* [ci] Remove superfluous space

* [ci] Output rustfmt version

* [ci] Tune rustfmt params

* Remove todo's

* Migrate erc721 ui test contract to recent example contract

* Remove --version command used to debug

* Apply cargo fmt

* .gitlab-ci.yml formatting

* Add main fn

* Remove todo from stderr expect

* Adapt fixtures

* Revert "Adapt fixtures"

This reverts commit 174c012e.

* Adapt fixtures

.gitlab-ci.yml

@@ -187,6 +187,9 @@ fmt:
   script:
     - cargo fmt --verbose --all -- --check
 
+    # For the UI tests we need to disable the license check
+    - cargo fmt --verbose --all -- --check --config=license_template_path="" crates/lang/macro/tests/ui/{pass,fail}/*.rs
+
 
 #### stage:                        examples
 

crates/lang/macro/tests/ui/fail/M-05-message-invalid-selector.rs

@@ -12,7 +12,7 @@ mod message_invalid_selector {
         }
 
         #[ink(message, selector = "0x00")]
-        pub fn invalid_selector(&self) { }
+        pub fn invalid_selector(&self) {}
     }
 }
 

crates/lang/macro/tests/ui/fail/S-04-non-storage-ink-impls.rs

@@ -11,7 +11,9 @@ mod non_storage_ink_impls {
     // This ink! impl block is okay.
     impl StorageStruct {
         #[ink(constructor)]
-        pub fn constructor1() -> Self { todo!() }
+        pub fn constructor1() -> Self {
+            Self {}
+        }
 
         #[ink(message)]
         pub fn message1(&self) {}
@@ -25,7 +27,9 @@ mod non_storage_ink_impls {
     // storage struct. We expect a failure here.
     impl NonStorageStruct {
         #[ink(constructor)]
-        pub fn constructor2() -> Self { todo!() }
+        pub fn constructor2() -> Self {
+            Self {}
+        }
 
         #[ink(message)]
         pub fn message2(&self) {}

crates/lang/macro/tests/ui/fail/S-04-non-storage-ink-impls.stderr

 error[E0271]: type mismatch resolving `<NonStorageStruct as non_storage_ink_impls::_::_::{closure#0}::TypeEq>::This == StorageStruct`
-  --> $DIR/S-04-non-storage-ink-impls.rs:26:10
+  --> $DIR/S-04-non-storage-ink-impls.rs:28:10
    |
-26 |     impl NonStorageStruct {
+28 |     impl NonStorageStruct {
    |          ^^^^^^^^^^^^^^^^
    |          |
    |          expected struct `StorageStruct`, found struct `NonStorageStruct`
@@ -11,24 +11,24 @@ error[E0271]: type mismatch resolving `<NonStorageStruct as non_storage_ink_impl
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0599]: no function or associated item named `constructor2` found for struct `StorageStruct` in the current scope
-  --> $DIR/S-04-non-storage-ink-impls.rs:28:16
+  --> $DIR/S-04-non-storage-ink-impls.rs:30:16
    |
 9  |     pub struct StorageStruct {}
    |     ------------------------ function or associated item `constructor2` not found for this
 ...
-28 |         pub fn constructor2() -> Self { todo!() }
+30 |         pub fn constructor2() -> Self {
    |                ^^^^^^^^^^^^
    |                |
    |                function or associated item not found in `StorageStruct`
    |                help: there is an associated function with a similar name: `constructor1`
 
 error[E0599]: no function or associated item named `message2` found for struct `StorageStruct` in the current scope
-  --> $DIR/S-04-non-storage-ink-impls.rs:31:16
+  --> $DIR/S-04-non-storage-ink-impls.rs:35:16
    |
 9  |     pub struct StorageStruct {}
    |     ------------------------ function or associated item `message2` not found for this
 ...
-31 |         pub fn message2(&self) {}
+35 |         pub fn message2(&self) {}
    |                ^^^^^^^^
    |                |
    |                function or associated item not found in `StorageStruct`

crates/lang/macro/tests/ui/pass/02-flipper-contract.rs

@@ -10,9 +10,7 @@ mod flipper {
     impl Flipper {
         #[ink(constructor)]
         pub fn new(init_value: bool) -> Self {
-            Self {
-                value: init_value,
-            }
+            Self { value: init_value }
         }
 
         #[ink(constructor)]