tests/echo: complete tests excepting help, version

tests/test_echo.rs

@@ -7,33 +7,82 @@ fn new_ucmd() -> UCommand {
 
 #[test]
 fn test_default() {
-    assert_eq!(new_ucmd()
-        .run().stdout, "\n");
+    //CmdResult.stdout_only(...) trims trailing newlines
+    assert_eq!("hi\n", new_ucmd().arg("hi").succeeds().no_stderr().stdout);
 }
 
 #[test]
 fn test_no_trailing_newline() {
-    new_ucmd()
-        .arg("-n")
-        .arg("hello_world")
-        .run()
-        .stdout_is("hello_world");
+    //CmdResult.stdout_only(...) trims trailing newlines
+    assert_eq!("hi", new_ucmd().arg("-n").arg("hi").succeeds().no_stderr().stdout);
 }
 
 #[test]
-fn test_enable_escapes() {
-    new_ucmd()
-        .arg("-e")
-        .arg("\\\\\\t\\r")
-        .run()
-        .stdout_is("\\\t\r\n");
+fn test_escape_alert() {
+    new_ucmd().args(&["-e", "\\a"]).succeeds().stdout_only("\x07\n");
+}
+
+#[test]
+fn test_escape_backslash() {
+    new_ucmd().args(&["-e", "\\\\"]).succeeds().stdout_only("\\\n");
+}
+
+#[test]
+fn test_escape_backspace() {
+    new_ucmd().args(&["-e", "\\b"]).succeeds().stdout_only("\x08\n");
+}
+
+#[test]
+fn test_escape_carriage_return() {
+    new_ucmd().args(&["-e", "\\r"]).succeeds().stdout_only("\r\n");
+}
+
+#[test]
+fn test_escape_escape() {
+    new_ucmd().args(&["-e", "\\e"]).succeeds().stdout_only("\x1B\n");
+}
+
+#[test]
+fn test_escape_form_feed() {
+    new_ucmd().args(&["-e", "\\f"]).succeeds().stdout_only("\x0C\n");
+}
+
+#[test]
+fn test_escape_hex() {
+    new_ucmd().args(&["-e", "\\x41"]).succeeds().stdout_only("A");
+}
+
+#[test]
+fn test_escape_newline() {
+    new_ucmd().args(&["-e", "\\na"]).succeeds().stdout_only("\na");
+}
+
+#[test]
+fn test_escape_no_further_output() {
+    new_ucmd().args(&["-e", "a\\cb"]).succeeds().stdout_only("a\n");
+}
+
+#[test]
+fn test_escape_octal() {
+    new_ucmd().args(&["-e", "\\0100"]).succeeds().stdout_only("@");
+}
+
+#[test]
+fn test_escape_tab() {
+    new_ucmd().args(&["-e", "\\t"]).succeeds().stdout_only("\t\n");
+}
+
+#[test]
+fn test_escape_vertical_tab() {
+    new_ucmd().args(&["-e", "\\v"]).succeeds().stdout_only("\x0B\n");
 }
 
 #[test]
 fn test_disable_escapes() {
+    let input_str = "\\a \\\\ \\b \\r \\e \\f \\x41 \\n a\\cb \\u0100 \\t \\v";
     new_ucmd()
         .arg("-E")
-        .arg("\\b\\c\\e")
-        .run()
-        .stdout_is("\\b\\c\\e\n");
+        .arg(input_str)
+        .succeeds()
+        .stdout_only(format!("{}\n", input_str));
 }