fix: cfg-ing out tests that require test alloc guarded features

Author: ngildenhuys

src/lib.rs

@@ -23,7 +23,7 @@
 #![deny(rust_2018_idioms)]
 #![deny(unused)]
 
-#[cfg(any(feature = "alloc", test))]
+#[cfg(feature = "alloc")]
 extern crate alloc;
 
 mod error;
@@ -80,7 +80,7 @@ impl core::error::Error for MaxRecursionReached {}
 /// ```
 /// # #[cfg(feature = "derive")] mod foo {
 /// use arbitrary::Arbitrary;
-/// use alloc::collections::HashSet;
+/// use std::collections::HashSet;
 ///
 /// #[derive(Arbitrary)]
 /// pub struct AddressBook {

src/tests.rs

@@ -1,6 +1,7 @@
+#[cfg(feature = "alloc")]
+use alloc::{rc::Rc, string::String, sync::Arc, vec::Vec};
 use {
     super::{Arbitrary, Result, Unstructured},
-    alloc::{rc::Rc, sync::Arc},
     core::{fmt::Debug, hash::Hash},
     std::collections::HashSet,
 };
@@ -156,6 +157,7 @@ fn arbitrary_take_rest_for_bytes() {
 }
 
 #[test]
+#[cfg(feature = "alloc")]
 fn arbitrary_for_vec_u8() {
     assert_generates::<Vec<u8>>([
         vec![],
@@ -177,6 +179,7 @@ fn arbitrary_for_vec_u8() {
 }
 
 #[test]
+#[cfg(feature = "alloc")]
 fn arbitrary_for_vec_vec_u8() {
     assert_generates::<Vec<Vec<u8>>>([
         vec![],
@@ -195,6 +198,7 @@ fn arbitrary_for_vec_vec_u8() {
 }
 
 #[test]
+#[cfg(feature = "alloc")]
 fn arbitrary_for_vec_vec_vec_u8() {
     assert_generates::<Vec<Vec<Vec<u8>>>>([
         vec![],
@@ -219,11 +223,13 @@ fn arbitrary_for_vec_vec_vec_u8() {
 }
 
 #[test]
+#[cfg(feature = "alloc")]
 fn arbitrary_for_string() {
     assert_generates::<String>(["".into(), "a".into(), "aa".into(), "aaa".into()]);
 }
 
 #[test]
+#[cfg(feature = "alloc")]
 fn arbitrary_collection() {
     let x = [
         1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 12,
@@ -259,6 +265,7 @@ fn arbitrary_collection() {
 }
 
 #[test]
+#[cfg(feature = "alloc")]
 fn arbitrary_take_rest() {
     // Basic examples
     let x = [1, 2, 3, 4];
@@ -309,6 +316,7 @@ fn arbitrary_take_rest() {
 }
 
 #[test]
+#[cfg(feature = "alloc")]
 fn size_hint_for_tuples() {
     assert_eq!(
         (7, Some(7)),