tests ~ reorganize tests

tests/by-util/test_unexpand.rs

@@ -0,0 +1,138 @@
+use crate::common::util::*;
+
+#[test]
+fn unexpand_init_0() {
+    new_ucmd!()
+        .args(&["-t4"])
+        .pipe_in(" 1\n  2\n   3\n    4\n")
+        .run()
+        .stdout_is(" 1\n  2\n   3\n\t4\n");
+}
+
+#[test]
+fn unexpand_init_1() {
+    new_ucmd!()
+        .args(&["-t4"])
+        .pipe_in("     5\n      6\n       7\n        8\n")
+        .run()
+        .stdout_is("\t 5\n\t  6\n\t   7\n\t\t8\n");
+}
+
+#[test]
+fn unexpand_init_list_0() {
+    new_ucmd!()
+        .args(&["-t2,4"])
+        .pipe_in(" 1\n  2\n   3\n    4\n")
+        .run()
+        .stdout_is(" 1\n\t2\n\t 3\n\t\t4\n");
+}
+
+#[test]
+fn unexpand_init_list_1() {
+    // Once the list is exhausted, spaces are not converted anymore
+    new_ucmd!()
+        .args(&["-t2,4"])
+        .pipe_in("     5\n      6\n       7\n        8\n")
+        .run()
+        .stdout_is("\t\t 5\n\t\t  6\n\t\t   7\n\t\t    8\n");
+}
+
+#[test]
+fn unexpand_aflag_0() {
+    new_ucmd!()
+        .args(&["--"])
+        .pipe_in("e     E\nf      F\ng       G\nh        H\n")
+        .run()
+        .stdout_is("e     E\nf      F\ng       G\nh        H\n");
+}
+
+#[test]
+fn unexpand_aflag_1() {
+    new_ucmd!()
+        .args(&["-a"])
+        .pipe_in("e     E\nf      F\ng       G\nh        H\n")
+        .run()
+        .stdout_is("e     E\nf      F\ng\tG\nh\t H\n");
+}
+
+#[test]
+fn unexpand_aflag_2() {
+    new_ucmd!()
+        .args(&["-t8"])
+        .pipe_in("e     E\nf      F\ng       G\nh        H\n")
+        .run()
+        .stdout_is("e     E\nf      F\ng\tG\nh\t H\n");
+}
+
+#[test]
+fn unexpand_first_only_0() {
+    new_ucmd!()
+        .args(&["-t3"])
+        .pipe_in("        A     B")
+        .run()
+        .stdout_is("\t\t  A\t  B");
+}
+
+#[test]
+fn unexpand_first_only_1() {
+    new_ucmd!()
+        .args(&["-t3", "--first-only"])
+        .pipe_in("        A     B")
+        .run()
+        .stdout_is("\t\t  A     B");
+}
+
+#[test]
+fn unexpand_trailing_space_0() {
+    // evil
+    // Individual spaces before fields starting with non blanks should not be
+    // converted, unless they are at the beginning of the line.
+    new_ucmd!()
+        .args(&["-t4"])
+        .pipe_in("123 \t1\n123 1\n123 \n123 ")
+        .run()
+        .stdout_is("123\t\t1\n123 1\n123 \n123 ");
+}
+
+#[test]
+fn unexpand_trailing_space_1() {
+    // super evil
+    new_ucmd!()
+        .args(&["-t1"])
+        .pipe_in(" abc d e  f  g ")
+        .run()
+        .stdout_is("\tabc d e\t\tf\t\tg ");
+}
+
+#[test]
+fn unexpand_spaces_follow_tabs_0() {
+    // The two first spaces can be included into the first tab.
+    new_ucmd!()
+        .pipe_in("  \t\t   A")
+        .run()
+        .stdout_is("\t\t   A");
+}
+
+#[test]
+fn unexpand_spaces_follow_tabs_1() {
+    // evil
+    // Explanation of what is going on here:
+    //      'a' -> 'a'          // first tabstop (1)
+    //    ' \t' -> '\t'         // second tabstop (4)
+    //      ' ' -> '\t'         // third tabstop (5)
+    // '  B \t' -> '  B \t'     // after the list is exhausted, nothing must change
+    new_ucmd!()
+        .args(&["-t1,4,5"])
+        .pipe_in("a \t   B \t")
+        .run()
+        .stdout_is("a\t\t  B \t");
+}
+
+#[test]
+fn unexpand_spaces_after_fields() {
+    new_ucmd!()
+        .args(&["-a"])
+        .pipe_in("   \t        A B C D             A\t\n")
+        .run()
+        .stdout_is("\t\tA B C D\t\t    A\t\n");
+}