tests ~ reorganize tests

tests/by-util/test_who.rs

@@ -0,0 +1,84 @@
+#[cfg(target_os = "linux")]
+use crate::common::util::*;
+
+#[cfg(target_os = "linux")]
+#[test]
+fn test_count() {
+    for opt in vec!["-q", "--count"] {
+        new_ucmd!().arg(opt).run().stdout_is(expected_result(opt));
+    }
+}
+
+#[cfg(target_os = "linux")]
+#[test]
+fn test_boot() {
+    for opt in vec!["-b", "--boot"] {
+        new_ucmd!().arg(opt).run().stdout_is(expected_result(opt));
+    }
+}
+
+#[cfg(target_os = "linux")]
+#[test]
+fn test_heading() {
+    for opt in vec!["-H"] {
+        // allow whitespace variation
+        // * minor whitespace differences occur between platform built-in outputs; specifically number of TABs between "TIME" and "COMMENT" may be variant
+        let actual = new_ucmd!().arg(opt).run().stdout;
+        let expect = expected_result(opt);
+        println!("actual: {:?}", actual);
+        println!("expect: {:?}", expect);
+        let v_actual: Vec<&str> = actual.split_whitespace().collect();
+        let v_expect: Vec<&str> = expect.split_whitespace().collect();
+        assert_eq!(v_actual, v_expect);
+    }
+}
+
+#[cfg(target_os = "linux")]
+#[test]
+fn test_short() {
+    for opt in vec!["-s", "--short"] {
+        new_ucmd!().arg(opt).run().stdout_is(expected_result(opt));
+    }
+}
+
+#[cfg(target_os = "linux")]
+#[test]
+fn test_login() {
+    for opt in vec!["-l", "--login"] {
+        new_ucmd!().arg(opt).run().stdout_is(expected_result(opt));
+    }
+}
+
+#[cfg(target_os = "linux")]
+#[test]
+fn test_m() {
+    for opt in vec!["-m"] {
+        new_ucmd!().arg(opt).run().stdout_is(expected_result(opt));
+    }
+}
+
+#[cfg(target_os = "linux")]
+#[test]
+fn test_dead() {
+    for opt in vec!["-d", "--dead"] {
+        new_ucmd!().arg(opt).run().stdout_is(expected_result(opt));
+    }
+}
+
+#[cfg(target_os = "linux")]
+#[test]
+fn test_all() {
+    for opt in vec!["-a", "--all"] {
+        new_ucmd!().arg(opt).run().stdout_is(expected_result(opt));
+    }
+}
+
+#[cfg(target_os = "linux")]
+fn expected_result(arg: &str) -> String {
+    TestScenario::new(util_name!())
+        .cmd_keepenv(util_name!())
+        .env("LANGUAGE", "C")
+        .args(&[arg])
+        .run()
+        .stdout
+}