fix clippy::manual_assert in tests

Author: hellow554

tests/adaptors_no_collect.rs

@@ -11,12 +11,11 @@ impl Iterator for PanickingCounter {
     fn next(&mut self) -> Option<Self::Item> {
         self.curr += 1;
 
-        if self.curr == self.max {
-            panic!(
-                "Input iterator reached maximum of {} suggesting collection by adaptor",
-                self.max
-            );
-        }
+        assert_ne!(
+            self.curr, self.max,
+            "Input iterator reached maximum of {} suggesting collection by adaptor",
+            self.max
+        );
 
         Some(())
     }
@@ -44,4 +43,4 @@ fn combinations_no_collect() {
 #[test]
 fn combinations_with_replacement_no_collect() {
     no_collect_test(|iter| iter.combinations_with_replacement(5))
-}
+}

tests/quick.rs

@@ -258,9 +258,7 @@ where
         let mut it = get_it();
 
         for _ in 0..(counts.len() - 1) {
-            if it.next().is_none() {
-                panic!("Iterator shouldn't be finished, may not be deterministic");
-            }
+            assert!(it.next().is_some(), "Iterator shouldn't be finished, may not be deterministic");
         }
 
         if it.next().is_none() {