Rollup merge of rust-lang#106398 - jyn514:fix-clippy, r=thomcc

Fix a few clippy lints in libtest

- Remove unnecessary references and dereferences
- Use `.contains` instead of `a <= x && x <= b`
- Use `mem::take` instead of `mem::replace` where possible

cc rust-lang#106394 :)

library/test/src/console.rs

@@ -147,7 +147,7 @@ pub fn list_tests_console(opts: &TestOpts, tests: Vec<TestDescAndFn>) -> io::Res
     let mut ntest = 0;
     let mut nbench = 0;
 
-    for test in filter_tests(&opts, tests).into_iter() {
+    for test in filter_tests(opts, tests).into_iter() {
         use crate::TestFn::*;
 
         let TestDescAndFn { desc: TestDesc { name, .. }, testfn } = test;
@@ -244,7 +244,7 @@ fn on_test_event(
             let stdout = &completed_test.stdout;
 
             st.write_log_result(test, result, exec_time.as_ref())?;
-            out.write_result(test, result, exec_time.as_ref(), &*stdout, st)?;
+            out.write_result(test, result, exec_time.as_ref(), stdout, st)?;
             handle_test_result(st, completed_test);
         }
     }
@@ -262,7 +262,7 @@ pub fn run_tests_console(opts: &TestOpts, tests: Vec<TestDescAndFn>) -> io::Resu
 
     let max_name_len = tests
         .iter()
-        .max_by_key(|t| len_if_padded(*t))
+        .max_by_key(|t| len_if_padded(t))
         .map(|t| t.desc.name.as_slice().len())
         .unwrap_or(0);
 

library/test/src/formatters/json.rs

@@ -40,20 +40,20 @@ impl<T: Write> JsonFormatter<T> {
         extra: Option<&str>,
     ) -> io::Result<()> {
         // A doc test's name includes a filename which must be escaped for correct json.
-        self.write_message(&*format!(
+        self.write_message(&format!(
             r#"{{ "type": "{}", "name": "{}", "event": "{}""#,
             ty,
             EscapedString(name),
             evt
         ))?;
         if let Some(exec_time) = exec_time {
-            self.write_message(&*format!(r#", "exec_time": {}"#, exec_time.0.as_secs_f64()))?;
+            self.write_message(&format!(r#", "exec_time": {}"#, exec_time.0.as_secs_f64()))?;
         }
         if let Some(stdout) = stdout {
-            self.write_message(&*format!(r#", "stdout": "{}""#, EscapedString(stdout)))?;
+            self.write_message(&format!(r#", "stdout": "{}""#, EscapedString(stdout)))?;
         }
         if let Some(extra) = extra {
-            self.write_message(&*format!(r#", {extra}"#))?;
+            self.write_message(&format!(r#", {extra}"#))?;
         }
         self.writeln_message(" }")
     }
@@ -66,13 +66,13 @@ impl<T: Write> OutputFormatter for JsonFormatter<T> {
         } else {
             String::new()
         };
-        self.writeln_message(&*format!(
+        self.writeln_message(&format!(
             r#"{{ "type": "suite", "event": "started", "test_count": {test_count}{shuffle_seed_json} }}"#
         ))
     }
 
     fn write_test_start(&mut self, desc: &TestDesc) -> io::Result<()> {
-        self.writeln_message(&*format!(
+        self.writeln_message(&format!(
             r#"{{ "type": "test", "event": "started", "name": "{}" }}"#,
             EscapedString(desc.name.as_slice())
         ))
@@ -151,20 +151,20 @@ impl<T: Write> OutputFormatter for JsonFormatter<T> {
                     mbps
                 );
 
-                self.writeln_message(&*line)
+                self.writeln_message(&line)
             }
         }
     }
 
     fn write_timeout(&mut self, desc: &TestDesc) -> io::Result<()> {
-        self.writeln_message(&*format!(
+        self.writeln_message(&format!(
             r#"{{ "type": "test", "event": "timeout", "name": "{}" }}"#,
             EscapedString(desc.name.as_slice())
         ))
     }
 
     fn write_run_finish(&mut self, state: &ConsoleTestState) -> io::Result<bool> {
-        self.write_message(&*format!(
+        self.write_message(&format!(
             "{{ \"type\": \"suite\", \
              \"event\": \"{}\", \
              \"passed\": {}, \

library/test/src/formatters/junit.rs

@@ -64,7 +64,7 @@ impl<T: Write> OutputFormatter for JunitFormatter<T> {
     fn write_run_finish(&mut self, state: &ConsoleTestState) -> io::Result<bool> {
         self.write_message("<testsuites>")?;
 
-        self.write_message(&*format!(
+        self.write_message(&format!(
             "<testsuite name=\"test\" package=\"test\" id=\"0\" \
              errors=\"0\" \
              failures=\"{}\" \
@@ -73,12 +73,12 @@ impl<T: Write> OutputFormatter for JunitFormatter<T> {
              >",
             state.failed, state.total, state.ignored
         ))?;
-        for (desc, result, duration) in std::mem::replace(&mut self.results, Vec::new()) {
+        for (desc, result, duration) in std::mem::take(&mut self.results) {
             let (class_name, test_name) = parse_class_name(&desc);
             match result {
                 TestResult::TrIgnored => { /* no-op */ }
                 TestResult::TrFailed => {
-                    self.write_message(&*format!(
+                    self.write_message(&format!(
                         "<testcase classname=\"{}\" \
                          name=\"{}\" time=\"{}\">",
                         class_name,
@@ -90,19 +90,19 @@ impl<T: Write> OutputFormatter for JunitFormatter<T> {
                 }
 
                 TestResult::TrFailedMsg(ref m) => {
-                    self.write_message(&*format!(
+                    self.write_message(&format!(
                         "<testcase classname=\"{}\" \
                          name=\"{}\" time=\"{}\">",
                         class_name,
                         test_name,
                         duration.as_secs_f64()
                     ))?;
-                    self.write_message(&*format!("<failure message=\"{m}\" type=\"assert\"/>"))?;
+                    self.write_message(&format!("<failure message=\"{m}\" type=\"assert\"/>"))?;
                     self.write_message("</testcase>")?;
                 }
 
                 TestResult::TrTimedFail => {
-                    self.write_message(&*format!(
+                    self.write_message(&format!(
                         "<testcase classname=\"{}\" \
                          name=\"{}\" time=\"{}\">",
                         class_name,
@@ -114,15 +114,15 @@ impl<T: Write> OutputFormatter for JunitFormatter<T> {
                 }
 
                 TestResult::TrBench(ref b) => {
-                    self.write_message(&*format!(
+                    self.write_message(&format!(
                         "<testcase classname=\"benchmark::{}\" \
                          name=\"{}\" time=\"{}\" />",
                         class_name, test_name, b.ns_iter_summ.sum
                     ))?;
                 }
 
                 TestResult::TrOk => {
-                    self.write_message(&*format!(
+                    self.write_message(&format!(
                         "<testcase classname=\"{}\" \
                          name=\"{}\" time=\"{}\"/>",
                         class_name,

library/test/src/formatters/pretty.rs

@@ -134,7 +134,7 @@ impl<T: Write> PrettyFormatter<T> {
 
         let mut results = Vec::new();
         let mut stdouts = String::new();
-        for &(ref f, ref stdout) in inputs {
+        for (f, stdout) in inputs {
             results.push(f.name.to_string());
             if !stdout.is_empty() {
                 stdouts.push_str(&format!("---- {} stdout ----\n", f.name));
@@ -171,9 +171,9 @@ impl<T: Write> PrettyFormatter<T> {
     fn write_test_name(&mut self, desc: &TestDesc) -> io::Result<()> {
         let name = desc.padded_name(self.max_name_len, desc.name.padding());
         if let Some(test_mode) = desc.test_mode() {
-            self.write_plain(&format!("test {name} - {test_mode} ... "))?;
+            self.write_plain(format!("test {name} - {test_mode} ... "))?;
         } else {
-            self.write_plain(&format!("test {name} ... "))?;
+            self.write_plain(format!("test {name} ... "))?;
         }
 
         Ok(())
@@ -188,7 +188,7 @@ impl<T: Write> OutputFormatter for PrettyFormatter<T> {
         } else {
             String::new()
         };
-        self.write_plain(&format!("\nrunning {test_count} {noun}{shuffle_seed_msg}\n"))
+        self.write_plain(format!("\nrunning {test_count} {noun}{shuffle_seed_msg}\n"))
     }
 
     fn write_test_start(&mut self, desc: &TestDesc) -> io::Result<()> {
@@ -221,7 +221,7 @@ impl<T: Write> OutputFormatter for PrettyFormatter<T> {
             TestResult::TrIgnored => self.write_ignored(desc.ignore_message)?,
             TestResult::TrBench(ref bs) => {
                 self.write_bench()?;
-                self.write_plain(&format!(": {}", fmt_bench_samples(bs)))?;
+                self.write_plain(format!(": {}", fmt_bench_samples(bs)))?;
             }
             TestResult::TrTimedFail => self.write_time_failed()?,
         }
@@ -231,7 +231,7 @@ impl<T: Write> OutputFormatter for PrettyFormatter<T> {
     }
 
     fn write_timeout(&mut self, desc: &TestDesc) -> io::Result<()> {
-        self.write_plain(&format!(
+        self.write_plain(format!(
             "test {} has been running for over {} seconds\n",
             desc.name,
             time::TEST_WARN_TIMEOUT_S
@@ -267,11 +267,11 @@ impl<T: Write> OutputFormatter for PrettyFormatter<T> {
             state.passed, state.failed, state.ignored, state.measured, state.filtered_out
         );
 
-        self.write_plain(&s)?;
+        self.write_plain(s)?;
 
         if let Some(ref exec_time) = state.exec_time {
             let time_str = format!("; finished in {exec_time}");
-            self.write_plain(&time_str)?;
+            self.write_plain(time_str)?;
         }
 
         self.write_plain("\n\n")?;

library/test/src/formatters/terse.rs

@@ -70,7 +70,7 @@ impl<T: Write> TerseFormatter<T> {
             // screen when dealing with line-buffered output (e.g., piping to
             // `stamp` in the rust CI).
             let out = format!(" {}/{}\n", self.test_count + 1, self.total_test_count);
-            self.write_plain(&out)?;
+            self.write_plain(out)?;
         }
 
         self.test_count += 1;
@@ -106,7 +106,7 @@ impl<T: Write> TerseFormatter<T> {
         self.write_plain("\nsuccesses:\n")?;
         let mut successes = Vec::new();
         let mut stdouts = String::new();
-        for &(ref f, ref stdout) in &state.not_failures {
+        for (f, stdout) in &state.not_failures {
             successes.push(f.name.to_string());
             if !stdout.is_empty() {
                 stdouts.push_str(&format!("---- {} stdout ----\n", f.name));
@@ -132,7 +132,7 @@ impl<T: Write> TerseFormatter<T> {
         self.write_plain("\nfailures:\n")?;
         let mut failures = Vec::new();
         let mut fail_out = String::new();
-        for &(ref f, ref stdout) in &state.failures {
+        for (f, stdout) in &state.failures {
             failures.push(f.name.to_string());
             if !stdout.is_empty() {
                 fail_out.push_str(&format!("---- {} stdout ----\n", f.name));
@@ -157,9 +157,9 @@ impl<T: Write> TerseFormatter<T> {
     fn write_test_name(&mut self, desc: &TestDesc) -> io::Result<()> {
         let name = desc.padded_name(self.max_name_len, desc.name.padding());
         if let Some(test_mode) = desc.test_mode() {
-            self.write_plain(&format!("test {name} - {test_mode} ... "))?;
+            self.write_plain(format!("test {name} - {test_mode} ... "))?;
         } else {
-            self.write_plain(&format!("test {name} ... "))?;
+            self.write_plain(format!("test {name} ... "))?;
         }
 
         Ok(())
@@ -175,7 +175,7 @@ impl<T: Write> OutputFormatter for TerseFormatter<T> {
         } else {
             String::new()
         };
-        self.write_plain(&format!("\nrunning {test_count} {noun}{shuffle_seed_msg}\n"))
+        self.write_plain(format!("\nrunning {test_count} {noun}{shuffle_seed_msg}\n"))
     }
 
     fn write_test_start(&mut self, desc: &TestDesc) -> io::Result<()> {
@@ -209,13 +209,13 @@ impl<T: Write> OutputFormatter for TerseFormatter<T> {
                     self.write_test_name(desc)?;
                 }
                 self.write_bench()?;
-                self.write_plain(&format!(": {}\n", fmt_bench_samples(bs)))
+                self.write_plain(format!(": {}\n", fmt_bench_samples(bs)))
             }
         }
     }
 
     fn write_timeout(&mut self, desc: &TestDesc) -> io::Result<()> {
-        self.write_plain(&format!(
+        self.write_plain(format!(
             "test {} has been running for over {} seconds\n",
             desc.name,
             time::TEST_WARN_TIMEOUT_S
@@ -245,11 +245,11 @@ impl<T: Write> OutputFormatter for TerseFormatter<T> {
             state.passed, state.failed, state.ignored, state.measured, state.filtered_out
         );
 
-        self.write_plain(&s)?;
+        self.write_plain(s)?;
 
         if let Some(ref exec_time) = state.exec_time {
             let time_str = format!("; finished in {exec_time}");
-            self.write_plain(&time_str)?;
+            self.write_plain(time_str)?;
         }
 
         self.write_plain("\n\n")?;

library/test/src/lib.rs

@@ -789,7 +789,7 @@ fn run_test_in_spawned_subprocess(
         }
     });
     let record_result2 = record_result.clone();
-    panic::set_hook(Box::new(move |info| record_result2(Some(&info))));
+    panic::set_hook(Box::new(move |info| record_result2(Some(info))));
     if let Err(message) = testfn() {
         panic!("{}", message);
     }

library/test/src/term/terminfo/mod.rs

@@ -149,7 +149,7 @@ impl<T: Write + Send> Terminal for TerminfoTerminal<T> {
         // are there any terminals that have color/attrs and not sgr0?
         // Try falling back to sgr, then op
         let cmd = match ["sgr0", "sgr", "op"].iter().find_map(|cap| self.ti.strings.get(*cap)) {
-            Some(op) => match expand(&op, &[], &mut Variables::new()) {
+            Some(op) => match expand(op, &[], &mut Variables::new()) {
                 Ok(cmd) => cmd,
                 Err(e) => return Err(io::Error::new(io::ErrorKind::InvalidData, e)),
             },
@@ -180,12 +180,12 @@ impl<T: Write + Send> TerminfoTerminal<T> {
     }
 
     fn dim_if_necessary(&self, color: color::Color) -> color::Color {
-        if color >= self.num_colors && color >= 8 && color < 16 { color - 8 } else { color }
+        if color >= self.num_colors && (8..16).contains(&color) { color - 8 } else { color }
     }
 
     fn apply_cap(&mut self, cmd: &str, params: &[Param]) -> io::Result<bool> {
         match self.ti.strings.get(cmd) {
-            Some(cmd) => match expand(&cmd, params, &mut Variables::new()) {
+            Some(cmd) => match expand(cmd, params, &mut Variables::new()) {
                 Ok(s) => self.out.write_all(&s).and(Ok(true)),
                 Err(e) => Err(io::Error::new(io::ErrorKind::InvalidData, e)),
             },

library/test/src/term/terminfo/parm.rs

@@ -282,14 +282,14 @@ pub(crate) fn expand(
                 );
             }
             SetVar => {
-                if cur >= 'A' && cur <= 'Z' {
+                if cur.is_ascii_uppercase() {
                     if let Some(arg) = stack.pop() {
                         let idx = (cur as u8) - b'A';
                         vars.sta_va[idx as usize] = arg;
                     } else {
                         return Err("stack is empty".to_string());
                     }
-                } else if cur >= 'a' && cur <= 'z' {
+                } else if cur.is_ascii_lowercase() {
                     if let Some(arg) = stack.pop() {
                         let idx = (cur as u8) - b'a';
                         vars.dyn_va[idx as usize] = arg;
@@ -301,10 +301,10 @@ pub(crate) fn expand(
                 }
             }
             GetVar => {
-                if cur >= 'A' && cur <= 'Z' {
+                if cur.is_ascii_uppercase() {
                     let idx = (cur as u8) - b'A';
                     stack.push(vars.sta_va[idx as usize].clone());
-                } else if cur >= 'a' && cur <= 'z' {
+                } else if cur.is_ascii_lowercase() {
                     let idx = (cur as u8) - b'a';
                     stack.push(vars.dyn_va[idx as usize].clone());
                 } else {

library/test/src/term/terminfo/searcher.rs

@@ -22,7 +22,7 @@ pub(crate) fn get_dbpath_for_term(term: &str) -> Option<PathBuf> {
 
     if let Ok(dirs) = env::var("TERMINFO_DIRS") {
         for i in dirs.split(':') {
-            if i == "" {
+            if i.is_empty() {
                 dirs_to_search.push(PathBuf::from("/usr/share/terminfo"));
             } else {
                 dirs_to_search.push(PathBuf::from(i));
@@ -49,7 +49,7 @@ pub(crate) fn get_dbpath_for_term(term: &str) -> Option<PathBuf> {
     for mut p in dirs_to_search {
         if fs::metadata(&p).is_ok() {
             p.push(&first_char.to_string());
-            p.push(&term);
+            p.push(term);
             if fs::metadata(&p).is_ok() {
                 return Some(p);
             }

library/test/src/test_result.rs

@@ -33,7 +33,7 @@ pub fn calc_result<'a>(
 ) -> TestResult {
     let result = match (&desc.should_panic, task_result) {
         (&ShouldPanic::No, Ok(())) | (&ShouldPanic::Yes, Err(_)) => TestResult::TrOk,
-        (&ShouldPanic::YesWithMessage(msg), Err(ref err)) => {
+        (&ShouldPanic::YesWithMessage(msg), Err(err)) => {
             let maybe_panic_str = err
                 .downcast_ref::<String>()
                 .map(|e| &**e)
@@ -52,7 +52,7 @@ pub fn calc_result<'a>(
                     r#"expected panic with string value,
  found non-string value: `{:?}`
      expected substring: `{:?}`"#,
-                    (**err).type_id(),
+                    (*err).type_id(),
                     msg
                 ))
             }