Merge pull request #4232 from TechHara/whitespace

cut: add whitespace option for separating fields

tests/by-util/test_cut.rs

@@ -81,6 +81,38 @@ fn test_field_sequence() {
     }
 }
 
+#[test]
+fn test_whitespace_delimited() {
+    new_ucmd!()
+        .args(&["-w", "-f", COMPLEX_SEQUENCE.sequence, INPUT])
+        .succeeds()
+        .stdout_only_fixture("whitespace_delimited.expected");
+}
+
+#[test]
+fn test_whitespace_with_explicit_delimiter() {
+    new_ucmd!()
+        .args(&["-w", "-f", COMPLEX_SEQUENCE.sequence, "-d:"])
+        .fails()
+        .code_is(1);
+}
+
+#[test]
+fn test_whitespace_with_byte() {
+    new_ucmd!()
+        .args(&["-w", "-b", COMPLEX_SEQUENCE.sequence])
+        .fails()
+        .code_is(1);
+}
+
+#[test]
+fn test_whitespace_with_char() {
+    new_ucmd!()
+        .args(&["-c", COMPLEX_SEQUENCE.sequence, "-w"])
+        .fails()
+        .code_is(1);
+}
+
 #[test]
 fn test_specify_delimiter() {
     for param in ["-d", "--delimiter", "--del"] {

tests/fixtures/cut/whitespace_delimited.expected

@@ -0,0 +1,5 @@
+foo:bar:baz:qux:quux
+one:two:three:four:five:six:seven
+alpha:beta:gamma:delta:epsilon:zeta:eta:theta:iota:kappa:lambda:mu
+the	quick	fox	over	the	dog
+sally	sells	down	the	seashore	are	the	seashells	sally	sells