tests ~ reorganize tests

tests/by-util/test_wc.rs

@@ -0,0 +1,66 @@
+use crate::common::util::*;
+
+#[test]
+fn test_stdin_default() {
+    new_ucmd!()
+        .pipe_in_fixture("lorem_ipsum.txt")
+        .run()
+        .stdout_is("  13 109 772\n");
+}
+
+#[test]
+fn test_stdin_only_bytes() {
+    new_ucmd!()
+        .args(&["-c"])
+        .pipe_in_fixture("lorem_ipsum.txt")
+        .run()
+        .stdout_is(" 772\n");
+}
+
+#[test]
+fn test_stdin_all_counts() {
+    new_ucmd!()
+        .args(&["-c", "-m", "-l", "-L", "-w"])
+        .pipe_in_fixture("alice_in_wonderland.txt")
+        .run()
+        .stdout_is("   5  57 302 302  66\n");
+}
+
+#[test]
+fn test_single_default() {
+    new_ucmd!()
+        .arg("moby_dick.txt")
+        .run()
+        .stdout_is("   18  204 1115 moby_dick.txt\n");
+}
+
+#[test]
+fn test_single_only_lines() {
+    new_ucmd!()
+        .args(&["-l", "moby_dick.txt"])
+        .run()
+        .stdout_is("   18 moby_dick.txt\n");
+}
+
+#[test]
+fn test_single_all_counts() {
+    new_ucmd!()
+        .args(&["-c", "-l", "-L", "-m", "-w", "alice_in_wonderland.txt"])
+        .run()
+        .stdout_is("   5  57 302 302  66 alice_in_wonderland.txt\n");
+}
+
+#[test]
+fn test_multiple_default() {
+    new_ucmd!()
+        .args(&[
+            "lorem_ipsum.txt",
+            "moby_dick.txt",
+            "alice_in_wonderland.txt",
+        ])
+        .run()
+        .stdout_is(
+            "   13  109  772 lorem_ipsum.txt\n   18  204 1115 moby_dick.txt\n    5   57  302 \
+                alice_in_wonderland.txt\n   36  370 2189 total\n",
+        );
+}