1 files changed, 92 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui-internal/if_chain_style.rs b/src/tools/clippy/tests/ui-internal/if_chain_style.rs
new file mode 100644
index 000000000..b0d89e038
--- /dev/null
+++ b/src/tools/clippy/tests/ui-internal/if_chain_style.rs
@@ -0,0 +1,92 @@
+#![warn(clippy::if_chain_style)]
+#![allow(clippy::no_effect, clippy::nonminimal_bool, clippy::missing_clippy_version_attribute)]
+
+extern crate if_chain;
+
+use if_chain::if_chain;
+
+fn main() {
+    if true {
+        let x = "";
+        // `if_chain!` inside `if`
+        if_chain! {
+            if true;
+            if true;
+            then {}
+        }
+    }
+    if_chain! {
+        if true
+            // multi-line AND'ed conditions
+            && false;
+        if let Some(1) = Some(1);
+        // `let` before `then`
+        let x = "";
+        then {
+            ();
+        }
+    }
+    if_chain! {
+        // single `if` condition
+        if true;
+        then {
+            let x = "";
+            // nested if
+            if true {}
+        }
+    }
+    if_chain! {
+        // starts with `let ..`
+        let x = "";
+        if let Some(1) = Some(1);
+        then {
+            let x = "";
+            let x = "";
+            // nested if_chain!
+            if_chain! {
+                if true;
+                if true;
+                then {}
+            }
+        }
+    }
+}
+
+fn negative() {
+    if true {
+        ();
+        if_chain! {
+            if true;
+            if true;
+            then { (); }
+        }
+    }
+    if_chain! {
+        if true;
+        let x = "";
+        if true;
+        then { (); }
+    }
+    if_chain! {
+        if true;
+        if true;
+        then {
+            if true { 1 } else { 2 }
+        } else {
+            3
+        }
+    };
+    if true {
+        if_chain! {
+            if true;
+            if true;
+            then {}
+        }
+    } else if false {
+        if_chain! {
+            if true;
+            if false;
+            then {}
+        }
+    }
+}