base32/base64: handle two corner cases

* no padding
* --wrap 0

+ remove property_tests.rs, we don't need such tests as the
code is already tests by test_base* (+ it is too dependant
on the code structure)

Should make base64.pl pass

tests/by-util/test_base64.rs

@@ -40,6 +40,28 @@ fn test_encode_repeat_flags_later_wrap_15() {
         .stdout_only("aGVsbG8sIHdvcmx\nkIQ==\n"); // spell-checker:disable-line
 }
 
+#[test]
+fn test_decode_short() {
+    let input = "aQ";
+    new_ucmd!()
+        .args(&["--decode"])
+        .pipe_in(input)
+        .succeeds()
+        .stdout_only("i");
+}
+
+#[test]
+fn test_multi_lines() {
+    let input = ["aQ\n\n\n", "a\nQ==\n\n\n"];
+    for i in input {
+        new_ucmd!()
+            .args(&["--decode"])
+            .pipe_in(i)
+            .succeeds()
+            .stdout_only("i");
+    }
+}
+
 #[test]
 fn test_base64_encode_file() {
     new_ucmd!()
@@ -105,6 +127,17 @@ fn test_wrap() {
             // spell-checker:disable-next-line
             .stdout_only("VGhlIHF1aWNrIGJyb3du\nIGZveCBqdW1wcyBvdmVy\nIHRoZSBsYXp5IGRvZy4=\n");
     }
+    let input = "hello, world";
+    new_ucmd!()
+        .args(&["--wrap", "0"])
+        .pipe_in(input)
+        .succeeds()
+        .stdout_only("aGVsbG8sIHdvcmxk"); // spell-checker:disable-line
+    new_ucmd!()
+        .args(&["--wrap", "30"])
+        .pipe_in(input)
+        .succeeds()
+        .stdout_only("aGVsbG8sIHdvcmxk\n"); // spell-checker:disable-line
 }
 
 #[test]