Add tests and docs

This adds test to make sure correct behavior of lint
- The first test's option variable is not a temporary variable
- The second test does not make usage of `take()`
- The third test makes usage of `take()` and uses a temporary variable

1 files changed, 4 insertions, 2 deletions

diff --git a/clippy_lints/src/methods/mod.rs b/clippy_lints/src/methods/mod.rs
index 36844b3609b..48fa30ba929 100644
--- a/clippy_lints/src/methods/mod.rs
+++ b/clippy_lints/src/methods/mod.rs
@@ -2169,11 +2169,13 @@ declare_clippy_lint! {
     ///
     /// ### Example
     /// ```rust
-    /// // example code where clippy issues a warning
+    /// let x = Some(3);
+    /// x.as_ref().take();
     /// ```
     /// Use instead:
     /// ```rust
-    /// // example code which does not raise clippy warning
+    /// let x = Some(3);
+    /// x.as_ref();
     /// ```
     #[clippy::version = "1.61.0"]
     pub NEEDLESS_OPTION_TAKE,