1 files changed, 60 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/extend_with_drain.fixed b/src/tools/clippy/tests/ui/extend_with_drain.fixed
new file mode 100644
index 000000000..71ebad24c
--- /dev/null
+++ b/src/tools/clippy/tests/ui/extend_with_drain.fixed
@@ -0,0 +1,60 @@
+// run-rustfix
+#![warn(clippy::extend_with_drain)]
+#![allow(clippy::iter_with_drain)]
+use std::collections::BinaryHeap;
+fn main() {
+    //gets linted
+    let mut vec1 = vec![0u8; 1024];
+    let mut vec2: std::vec::Vec<u8> = Vec::new();
+    vec2.append(&mut vec1);
+
+    let mut vec3 = vec![0u8; 1024];
+    let mut vec4: std::vec::Vec<u8> = Vec::new();
+
+    vec4.append(&mut vec3);
+
+    let mut vec11: std::vec::Vec<u8> = Vec::new();
+
+    vec11.append(&mut return_vector());
+
+    //won't get linted it doesn't move the entire content of a vec into another
+    let mut test1 = vec![0u8, 10];
+    let mut test2: std::vec::Vec<u8> = Vec::new();
+
+    test2.extend(test1.drain(4..10));
+
+    let mut vec3 = vec![0u8; 104];
+    let mut vec7: std::vec::Vec<u8> = Vec::new();
+
+    vec3.append(&mut vec7);
+
+    let mut vec5 = vec![0u8; 1024];
+    let mut vec6: std::vec::Vec<u8> = Vec::new();
+
+    vec5.extend(vec6.drain(..4));
+
+    let mut vec9: std::vec::Vec<u8> = Vec::new();
+
+    return_vector().append(&mut vec9);
+
+    //won't get linted because it is not a vec
+
+    let mut heap = BinaryHeap::from(vec![1, 3]);
+    let mut heap2 = BinaryHeap::from(vec![]);
+    heap2.extend(heap.drain());
+
+    let mut x = vec![0, 1, 2, 3, 5];
+    let ref_x = &mut x;
+    let mut y = Vec::new();
+    y.append(ref_x);
+}
+
+fn return_vector() -> Vec<u8> {
+    let mut new_vector = vec![];
+
+    for i in 1..10 {
+        new_vector.push(i)
+    }
+
+    new_vector
+}