tests: use CmdResult::usage_error

tests/by-util/test_base32.rs

@@ -113,18 +113,12 @@ fn test_wrap_bad_arg() {
 
 #[test]
 fn test_base32_extra_operand() {
-    let ts = TestScenario::new(util_name!());
-
     // Expect a failure when multiple files are specified.
-    ts.ucmd()
+    new_ucmd!()
         .arg("a.txt")
         .arg("b.txt")
         .fails()
-        .stderr_only(format!(
-            "{0}: extra operand 'b.txt'\nTry '{1} {0} --help' for more information.",
-            ts.util_name,
-            ts.bin_path.to_string_lossy()
-        ));
+        .usage_error("extra operand 'b.txt'");
 }
 
 #[test]

tests/by-util/test_base64.rs

@@ -95,18 +95,12 @@ fn test_wrap_bad_arg() {
 
 #[test]
 fn test_base64_extra_operand() {
-    let ts = TestScenario::new(util_name!());
-
     // Expect a failure when multiple files are specified.
-    ts.ucmd()
+    new_ucmd!()
         .arg("a.txt")
         .arg("b.txt")
         .fails()
-        .stderr_only(format!(
-            "{0}: extra operand 'b.txt'\nTry '{1} {0} --help' for more information.",
-            ts.util_name,
-            ts.bin_path.to_string_lossy()
-        ));
+        .usage_error("extra operand 'b.txt'");
 }
 
 #[test]

tests/by-util/test_basename.rs

@@ -114,12 +114,7 @@ fn test_no_args() {
 
 #[test]
 fn test_no_args_output() {
-    let ts = TestScenario::new(util_name!());
-    ts.ucmd().fails().stderr_is(&format!(
-        "{0}: missing operand\nTry '{1} {0} --help' for more information.",
-        ts.util_name,
-        ts.bin_path.to_string_lossy()
-    ));
+    new_ucmd!().fails().usage_error("missing operand");
 }
 
 #[test]
@@ -129,12 +124,10 @@ fn test_too_many_args() {
 
 #[test]
 fn test_too_many_args_output() {
-    let ts = TestScenario::new(util_name!());
-    ts.ucmd().args(&["a", "b", "c"]).fails().stderr_is(format!(
-        "{0}: extra operand 'c'\nTry '{1} {0} --help' for more information.",
-        ts.util_name,
-        ts.bin_path.to_string_lossy()
-    ));
+    new_ucmd!()
+        .args(&["a", "b", "c"])
+        .fails()
+        .usage_error("extra operand 'c'");
 }
 
 #[cfg(any(unix, target_os = "redox"))]

tests/by-util/test_cp.rs

@@ -563,17 +563,13 @@ fn test_cp_backup_off() {
 
 #[test]
 fn test_cp_backup_no_clobber_conflicting_options() {
-    let ts = TestScenario::new(util_name!());
-    ts.ucmd()
+    new_ucmd!()
         .arg("--backup")
         .arg("--no-clobber")
         .arg(TEST_HELLO_WORLD_SOURCE)
         .arg(TEST_HOW_ARE_YOU_SOURCE)
-        .fails().stderr_is(&format!(
-            "{0}: options --backup and --no-clobber are mutually exclusive\nTry '{1} {0} --help' for more information.",
-            ts.util_name,
-            ts.bin_path.to_string_lossy()
-        ));
+        .fails()
+        .usage_error("options --backup and --no-clobber are mutually exclusive");
 }
 
 #[test]

tests/by-util/test_more.rs

@@ -15,15 +15,10 @@ fn test_more_dir_arg() {
     // Maybe we could capture the error, i.e. "Device not found" in that case
     // but I am leaving this for later
     if atty::is(atty::Stream::Stdout) {
-        let ts = TestScenario::new(util_name!());
-        let result = ts.ucmd().arg(".").run();
-        result.failure();
-        let expected_error_message = &format!(
-            "{0}: '.' is a directory.\nTry '{1} {0} --help' for more information.",
-            ts.util_name,
-            ts.bin_path.to_string_lossy()
-        );
-        assert_eq!(result.stderr_str().trim(), expected_error_message);
+        new_ucmd!()
+            .arg(".")
+            .fails()
+            .usage_error("'.' is a directory.");
     } else {
     }
 }

tests/by-util/test_mv.rs

@@ -522,17 +522,13 @@ fn test_mv_backup_off() {
 
 #[test]
 fn test_mv_backup_no_clobber_conflicting_options() {
-    let ts = TestScenario::new(util_name!());
-
-    ts.ucmd().arg("--backup")
+    new_ucmd!()
+        .arg("--backup")
         .arg("--no-clobber")
         .arg("file1")
         .arg("file2")
         .fails()
-        .stderr_is(&format!("{0}: options --backup and --no-clobber are mutually exclusive\nTry '{1} {0} --help' for more information.",
-            ts.util_name,
-            ts.bin_path.to_string_lossy()
-        ));
+        .usage_error("options --backup and --no-clobber are mutually exclusive");
 }
 
 #[test]

tests/by-util/test_nice.rs

@@ -22,15 +22,10 @@ fn test_negative_adjustment() {
 
 #[test]
 fn test_adjustment_with_no_command_should_error() {
-    let ts = TestScenario::new(util_name!());
-
-    ts.ucmd()
+    new_ucmd!()
         .args(&["-n", "19"])
-    .run()
-    .stderr_is(&format!("{0}: A command must be given with an adjustment.\nTry '{1} {0} --help' for more information.\n",
-        ts.util_name,
-        ts.bin_path.to_string_lossy()
-    ));
+        .fails()
+        .usage_error("A command must be given with an adjustment.");
 }
 
 #[test]

tests/by-util/test_seq.rs

@@ -66,24 +66,18 @@ fn test_hex_identifier_in_wrong_place() {
 
 #[test]
 fn test_rejects_nan() {
-    let ts = TestScenario::new(util_name!());
-
-    ts.ucmd().args(&["NaN"]).fails().stderr_only(format!(
-        "{0}: invalid 'not-a-number' argument: 'NaN'\nTry '{1} {0} --help' for more information.",
-        ts.util_name,
-        ts.bin_path.to_string_lossy()
-    ));
+    new_ucmd!()
+        .arg("NaN")
+        .fails()
+        .usage_error("invalid 'not-a-number' argument: 'NaN'");
 }
 
 #[test]
 fn test_rejects_non_floats() {
-    let ts = TestScenario::new(util_name!());
-
-    ts.ucmd().args(&["foo"]).fails().stderr_only(&format!(
-        "{0}: invalid floating point argument: 'foo'\nTry '{1} {0} --help' for more information.",
-        ts.util_name,
-        ts.bin_path.to_string_lossy()
-    ));
+    new_ucmd!()
+        .arg("foo")
+        .fails()
+        .usage_error("invalid floating point argument: 'foo'");
 }
 
 #[test]
@@ -547,11 +541,7 @@ fn test_trailing_whitespace_error() {
     new_ucmd!()
         .arg("1 ")
         .fails()
-        .no_stdout()
-        .stderr_contains("seq: invalid floating point argument: '1 '")
-        // FIXME The second line of the error message is "Try 'seq
-        // --help' for more information."
-        .stderr_contains("for more information.");
+        .usage_error("invalid floating point argument: '1 '");
 }
 
 #[test]

tests/by-util/test_stdbuf.rs

@@ -53,16 +53,10 @@ fn test_stdbuf_trailing_var_arg() {
 #[cfg(not(target_os = "windows"))]
 #[test]
 fn test_stdbuf_line_buffering_stdin_fails() {
-    let ts = TestScenario::new(util_name!());
-
-    ts.ucmd()
+    new_ucmd!()
         .args(&["-i", "L", "head"])
         .fails()
-        .stderr_is(&format!(
-            "{0}: line buffering stdin is meaningless\nTry '{1} {0} --help' for more information.",
-            ts.util_name,
-            ts.bin_path.to_string_lossy()
-        ));
+        .usage_error("line buffering stdin is meaningless");
 }
 
 #[cfg(not(target_os = "windows"))]