Add ucase(), lcase(), casecmp(), alpha(), digit(), alnum()

1 files changed, 68 insertions, 0 deletions

diff --git a/tests/strcase/driver.cxx b/tests/strcase/driver.cxx
new file mode 100644
index 0000000..4741856
--- /dev/null
+++ b/tests/strcase/driver.cxx
@@ -0,0 +1,68 @@
+// file      : tests/strcase/driver.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <string>
+#include <cassert>
+
+#include <butl/utility>
+
+using namespace std;
+using namespace butl;
+
+int
+main ()
+{
+  const string upper ("+/0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ");
+  const string lower ("+/0123456789abcdefghijklmnopqrstuvwxyz");
+
+  assert (casecmp (upper, lower) == 0);
+  assert (casecmp (upper, lower, upper.size ()) == 0);
+  assert (casecmp (upper, lower, 100) == 0);
+  assert (casecmp ("a", "A1") < 0);
+  assert (casecmp ("A1", "a") > 0);
+  assert (casecmp ("a", "A1", 1) == 0);
+  assert (casecmp ("A1", "a", 1) == 0);
+  assert (casecmp ("a", "b", 0) == 0);
+
+  for (size_t i (0); i < upper.size (); ++i)
+  {
+    assert (casecmp (upper[i], lower[i]) == 0);
+
+    if (i > 0)
+    {
+      assert (casecmp (upper[i], lower[i - 1]) > 0);
+      assert (casecmp (lower[i - 1], upper[i]) < 0);
+    }
+  }
+
+  // As casecmp() compares strings as if they have been converted to the
+  // lower case the characters [\]^_` (located between 'Z' and 'a' in the ASCII
+  // table) evaluates as less than any alphabetic character.
+  //
+  string ascii_91_96 ("[\\]^_`");
+  for (const auto& c: ascii_91_96)
+  {
+    assert (casecmp (&c, "A", 1) < 0);
+    assert (casecmp (&c, "a", 1) < 0);
+  }
+
+  assert (ucase (lower) == upper);
+  assert (lcase (upper) == lower);
+
+  assert (ucase (lower.c_str (), 20) == string (upper, 0, 20));
+  assert (lcase (upper.c_str (), 20) == string (lower, 0, 20));
+
+  assert (ucase (lower.c_str (), 0) == string ());
+  assert (lcase (upper.c_str (), 0) == string ());
+
+  assert (ucase ("") == string ());
+  assert (lcase ("") == string ());
+
+  string s (upper);
+  assert (lcase (s) == lower);
+
+  s = lower;
+  ucase (const_cast<char*> (s.data ()), s.size ());
+  assert (s == upper);
+}