make spec infra more ergonomic

Signed-off-by: Onur Özkan <work@onurozkan.dev>

kaptan-spec/tests/ui/fail_empty_explanation.rs

@@ -0,0 +1,5 @@
+use kaptan_spec::no_spec;
+
+no_spec!("   ");
+
+fn main() {}

kaptan-spec/tests/ui/fail_empty_explanation.stderr

@@ -0,0 +1,7 @@
+error: no-spec explanation must not be empty; use no_spec!("reason");
+ --> tests/ui/fail_empty_explanation.rs:3:1
+  |
+3 | no_spec!("   ");
+  | ^^^^^^^^^^^^^^^
+  |
+  = note: this error originates in the macro `no_spec` (in Nightly builds, run with -Z macro-backtrace for more info)

kaptan-spec/tests/ui/fail_invalid_suffix.rs

@@ -1,6 +0,0 @@
-use kaptan_spec::spec;
-
-#[spec("flight_core_contract.md")]
-struct InvalidSuffix;
-
-fn main() {}

kaptan-spec/tests/ui/fail_invalid_suffix.stderr

@@ -1,7 +0,0 @@
-error: spec path must end in `.spec.md`; use #[spec("file.spec.md")]
- --> tests/ui/fail_invalid_suffix.rs:3:1
-  |
-3 | #[spec("flight_core_contract.md")]
-  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-  |
-  = note: this error originates in the attribute macro `spec` (in Nightly builds, run with -Z macro-backtrace for more info)

kaptan-spec/tests/ui/fail_legacy_named_argument.rs

@@ -1,6 +0,0 @@
-use kaptan_spec::spec;
-
-#[spec(path = "flight_core_contract.spec.md")]
-struct LegacyNamedArgument;
-
-fn main() {}

kaptan-spec/tests/ui/fail_legacy_named_argument.stderr

@@ -1,7 +0,0 @@
-error: invalid spec attribute; use #[spec("file.spec.md")]
- --> tests/ui/fail_legacy_named_argument.rs:3:1
-  |
-3 | #[spec(path = "flight_core_contract.spec.md")]
-  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-  |
-  = note: this error originates in the attribute macro `spec` (in Nightly builds, run with -Z macro-backtrace for more info)

kaptan-spec/tests/ui/fail_missing_argument.rs

@@ -1,6 +1,5 @@
-use kaptan_spec::spec;
+use kaptan_spec::no_spec;
 
-#[spec]
-struct MissingArgument;
+no_spec!();
 
 fn main() {}

kaptan-spec/tests/ui/fail_missing_argument.stderr

@@ -1,7 +1,7 @@
-error: missing spec path; use #[spec("file.spec.md")]
+error: missing no-spec explanation; use no_spec!("reason");
  --> tests/ui/fail_missing_argument.rs:3:1
   |
-3 | #[spec]
-  | ^^^^^^^
+3 | no_spec!();
+  | ^^^^^^^^^^
   |
-  = note: this error originates in the attribute macro `spec` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `no_spec` (in Nightly builds, run with -Z macro-backtrace for more info)

kaptan-spec/tests/ui/fail_missing_sidecar.rs

@@ -1,7 +0,0 @@
-use kaptan_spec::spec;
-
-#[spec("fail_missing_sidecar.spec.md")]
-mod missing_spec {}
-
-fn main() {
-}

kaptan-spec/tests/ui/fail_missing_sidecar.stderr

@@ -1,5 +0,0 @@
-error: couldn't read `$DIR/tests/ui/fail_missing_sidecar.spec.md`: No such file or directory (os error 2)
- --> tests/ui/fail_missing_sidecar.rs:3:1
-  |
-3 | #[spec("fail_missing_sidecar.spec.md")]
-  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

kaptan-spec/tests/ui/fail_non_module_item.rs

@@ -1,6 +0,0 @@
-use kaptan_spec::spec;
-
-#[spec("flight_core_contract.spec.md")]
-struct FlightCore;
-
-fn main() {}

kaptan-spec/tests/ui/fail_non_module_item.stderr

@@ -1,7 +0,0 @@
-error: `#[spec]` may only be applied to a module
- --> tests/ui/fail_non_module_item.rs:3:1
-  |
-3 | #[spec("flight_core_contract.spec.md")]
-  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-  |
-  = note: this error originates in the attribute macro `spec` (in Nightly builds, run with -Z macro-backtrace for more info)

kaptan-spec/tests/ui/fail_non_string_argument.rs

@@ -1,6 +1,5 @@
-use kaptan_spec::spec;
+use kaptan_spec::no_spec;
 
-#[spec(42)]
-struct NonStringArgument;
+no_spec!(42);
 
 fn main() {}

kaptan-spec/tests/ui/fail_non_string_argument.stderr

@@ -1,7 +1,7 @@
-error: invalid spec attribute; use #[spec("file.spec.md")]
+error: invalid no-spec invocation; use no_spec!("reason");
  --> tests/ui/fail_non_string_argument.rs:3:1
   |
-3 | #[spec(42)]
-  | ^^^^^^^^^^^
+3 | no_spec!(42);
+  | ^^^^^^^^^^^^
   |
-  = note: this error originates in the attribute macro `spec` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `no_spec` (in Nightly builds, run with -Z macro-backtrace for more info)

kaptan-spec/tests/ui/flight_core_contract.rs

@@ -1,7 +1,6 @@
 use kaptan_spec::spec;
 
-#[spec("flight_core_contract.spec.md")]
-mod flight_core {}
+spec!("flight_core_contract.spec.md");
 
 fn main() {
     assert_eq!(core::mem::size_of::<()>(), 0);

kaptan-spec/tests/ui/no_spec.rs

@@ -0,0 +1,5 @@
+use kaptan_spec::no_spec;
+
+no_spec!("This fixture has no governed runtime behavior.");
+
+fn main() {}