From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/tools/clippy/tests/ui/collapsible_if.rs | 164 ++++++++++++++++++++++++++++
 1 file changed, 164 insertions(+)
 create mode 100644 src/tools/clippy/tests/ui/collapsible_if.rs

(limited to 'src/tools/clippy/tests/ui/collapsible_if.rs')

diff --git a/src/tools/clippy/tests/ui/collapsible_if.rs b/src/tools/clippy/tests/ui/collapsible_if.rs
new file mode 100644
index 000000000..cd231a5d7
--- /dev/null
+++ b/src/tools/clippy/tests/ui/collapsible_if.rs
@@ -0,0 +1,164 @@
+// run-rustfix
+#![allow(clippy::assertions_on_constants, clippy::equatable_if_let)]
+
+#[rustfmt::skip]
+#[warn(clippy::collapsible_if)]
+fn main() {
+    let x = "hello";
+    let y = "world";
+    if x == "hello" {
+        if y == "world" {
+            println!("Hello world!");
+        }
+    }
+
+    if x == "hello" || x == "world" {
+        if y == "world" || y == "hello" {
+            println!("Hello world!");
+        }
+    }
+
+    if x == "hello" && x == "world" {
+        if y == "world" || y == "hello" {
+            println!("Hello world!");
+        }
+    }
+
+    if x == "hello" || x == "world" {
+        if y == "world" && y == "hello" {
+            println!("Hello world!");
+        }
+    }
+
+    if x == "hello" && x == "world" {
+        if y == "world" && y == "hello" {
+            println!("Hello world!");
+        }
+    }
+
+    if 42 == 1337 {
+        if 'a' != 'A' {
+            println!("world!")
+        }
+    }
+
+    // Works because any if with an else statement cannot be collapsed.
+    if x == "hello" {
+        if y == "world" {
+            println!("Hello world!");
+        }
+    } else {
+        println!("Not Hello world");
+    }
+
+    if x == "hello" {
+        if y == "world" {
+            println!("Hello world!");
+        } else {
+            println!("Hello something else");
+        }
+    }
+
+    if x == "hello" {
+        print!("Hello ");
+        if y == "world" {
+            println!("world!")
+        }
+    }
+
+    if true {
+    } else {
+        assert!(true); // assert! is just an `if`
+    }
+
+
+    // The following tests check for the fix of https://github.com/rust-lang/rust-clippy/issues/798
+    if x == "hello" {// Not collapsible
+        if y == "world" {
+            println!("Hello world!");
+        }
+    }
+
+    if x == "hello" { // Not collapsible
+        if y == "world" {
+            println!("Hello world!");
+        }
+    }
+
+    if x == "hello" {
+        // Not collapsible
+        if y == "world" {
+            println!("Hello world!");
+        }
+    }
+
+    if x == "hello" {
+        if y == "world" { // Collapsible
+            println!("Hello world!");
+        }
+    }
+
+    if x == "hello" {
+        print!("Hello ");
+    } else {
+        // Not collapsible
+        if y == "world" {
+            println!("world!")
+        }
+    }
+
+    if x == "hello" {
+        print!("Hello ");
+    } else {
+        // Not collapsible
+        if let Some(42) = Some(42) {
+            println!("world!")
+        }
+    }
+
+    if x == "hello" {
+        /* Not collapsible */
+        if y == "world" {
+            println!("Hello world!");
+        }
+    }
+
+    if x == "hello" { /* Not collapsible */
+        if y == "world" {
+            println!("Hello world!");
+        }
+    }
+
+    // Test behavior wrt. `let_chains`.
+    // None of the cases below should be collapsed.
+    fn truth() -> bool { true }
+
+    // Prefix:
+    if let 0 = 1 {
+        if truth() {}
+    }
+
+    // Suffix:
+    if truth() {
+        if let 0 = 1 {}
+    }
+
+    // Midfix:
+    if truth() {
+        if let 0 = 1 {
+            if truth() {}
+        }
+    }
+
+    // Fix #5962
+    if matches!(true, true) {
+        if matches!(true, true) {}
+    }
+
+    if true {
+        #[cfg(not(teehee))]
+        if true {
+            println!("Hello world!");
+        }
+    }
+}
-- 
cgit v1.2.3