Update upstream source from tag 'upstream/1.52.1+dfsg1'

[rustc.git] / src / tools / clippy / tests / ui / single_char_pattern.rs

diff --git a/src/tools/clippy/tests/ui/single_char_pattern.rs b/src/tools/clippy/tests/ui/single_char_pattern.rs
new file mode 100644 (file)
index 0000000..a7bc73e
--- /dev/null
+++ b/src/tools/clippy/tests/ui/single_char_pattern.rs
@@ -0,0 +1,57 @@
+// run-rustfix
+
+#![allow(unused_must_use)]
+
+use std::collections::HashSet;
+
+fn main() {
+    let x = "foo";
+    x.split("x");
+    x.split("xx");
+    x.split('x');
+
+    let y = "x";
+    x.split(y);
+    x.split("ß");
+    x.split("ℝ");
+    x.split("💣");
+    // Can't use this lint for unicode code points which don't fit in a char
+    x.split("❤️");
+    x.contains("x");
+    x.starts_with("x");
+    x.ends_with("x");
+    x.find("x");
+    x.rfind("x");
+    x.rsplit("x");
+    x.split_terminator("x");
+    x.rsplit_terminator("x");
+    x.splitn(0, "x");
+    x.rsplitn(0, "x");
+    x.matches("x");
+    x.rmatches("x");
+    x.match_indices("x");
+    x.rmatch_indices("x");
+    x.trim_start_matches("x");
+    x.trim_end_matches("x");
+    // Make sure we escape characters correctly.
+    x.split("\n");
+    x.split("'");
+    x.split("\'");
+
+    let h = HashSet::<String>::new();
+    h.contains("X"); // should not warn
+
+    x.replace(";", ",").split(","); // issue #2978
+    x.starts_with("\x03"); // issue #2996
+
+    // Issue #3204
+    const S: &str = "#";
+    x.find(S);
+
+    // Raw string
+    x.split(r"a");
+    x.split(r#"a"#);
+    x.split(r###"a"###);
+    x.split(r###"'"###);
+    x.split(r###"#"###);
+}