tests ~ reorganize tests

tests/by-util/test_head.rs

@@ -0,0 +1,87 @@
+use crate::common::util::*;
+
+static INPUT: &'static str = "lorem_ipsum.txt";
+
+#[test]
+fn test_stdin_default() {
+    new_ucmd!()
+        .pipe_in_fixture(INPUT)
+        .run()
+        .stdout_is_fixture("lorem_ipsum_default.expected");
+}
+
+#[test]
+fn test_stdin_1_line_obsolete() {
+    new_ucmd!()
+        .args(&["-1"])
+        .pipe_in_fixture(INPUT)
+        .run()
+        .stdout_is_fixture("lorem_ipsum_1_line.expected");
+}
+
+#[test]
+fn test_stdin_1_line() {
+    new_ucmd!()
+        .args(&["-n", "1"])
+        .pipe_in_fixture(INPUT)
+        .run()
+        .stdout_is_fixture("lorem_ipsum_1_line.expected");
+}
+
+#[test]
+fn test_stdin_negative_23_line() {
+    new_ucmd!()
+        .args(&["-n", "-23"])
+        .pipe_in_fixture(INPUT)
+        .run()
+        .stdout_is_fixture("lorem_ipsum_1_line.expected");
+}
+
+#[test]
+fn test_stdin_5_chars() {
+    new_ucmd!()
+        .args(&["-c", "5"])
+        .pipe_in_fixture(INPUT)
+        .run()
+        .stdout_is_fixture("lorem_ipsum_5_chars.expected");
+}
+
+#[test]
+fn test_single_default() {
+    new_ucmd!()
+        .arg(INPUT)
+        .run()
+        .stdout_is_fixture("lorem_ipsum_default.expected");
+}
+
+#[test]
+fn test_single_1_line_obsolete() {
+    new_ucmd!()
+        .args(&["-1", INPUT])
+        .run()
+        .stdout_is_fixture("lorem_ipsum_1_line.expected");
+}
+
+#[test]
+fn test_single_1_line() {
+    new_ucmd!()
+        .args(&["-n", "1", INPUT])
+        .run()
+        .stdout_is_fixture("lorem_ipsum_1_line.expected");
+}
+
+#[test]
+fn test_single_5_chars() {
+    new_ucmd!()
+        .args(&["-c", "5", INPUT])
+        .run()
+        .stdout_is_fixture("lorem_ipsum_5_chars.expected");
+}
+
+#[test]
+fn test_verbose() {
+    new_ucmd!()
+        .args(&["-v", INPUT])
+        .run()
+        .stdout_is_fixture("lorem_ipsum_verbose.expected");
+}