unittests/Support/UnicodeTest.cpp

   1 //===- unittests/Support/UnicodeTest.cpp - Unicode.h tests ----------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/Support/Unicode.h"
  11 #include "gtest/gtest.h"
  12
  13 namespace llvm {
  14 namespace sys {
  15 namespace unicode {
  16 namespace {
  17
  18 TEST(Unicode, columnWidthUTF8) {
  19   EXPECT_EQ(0, columnWidthUTF8(""));
  20   EXPECT_EQ(1, columnWidthUTF8(" "));
  21   EXPECT_EQ(1, columnWidthUTF8("a"));
  22   EXPECT_EQ(1, columnWidthUTF8("~"));
  23
  24   EXPECT_EQ(6, columnWidthUTF8("abcdef"));
  25
  26   EXPECT_EQ(-1, columnWidthUTF8("\x01"));
  27   EXPECT_EQ(-1, columnWidthUTF8("aaaaaaaaaa\x01"));
  28   EXPECT_EQ(-1, columnWidthUTF8("\342\200\213")); // 200B ZERO WIDTH SPACE
  29
  30   // 00AD SOFT HYPHEN is displayed on most terminals as a space or a dash. Some
  31   // text editors display it only when a line is broken at it, some use it as a
  32   // line-break hint, but don't display. We choose terminal-oriented
  33   // interpretation.
  34   EXPECT_EQ(1, columnWidthUTF8("\302\255"));
  35
  36   EXPECT_EQ(0, columnWidthUTF8("\314\200"));     // 0300 COMBINING GRAVE ACCENT
  37   EXPECT_EQ(1, columnWidthUTF8("\340\270\201")); // 0E01 THAI CHARACTER KO KAI
  38   EXPECT_EQ(2, columnWidthUTF8("\344\270\200")); // CJK UNIFIED IDEOGRAPH-4E00
  39
  40   EXPECT_EQ(4, columnWidthUTF8("\344\270\200\344\270\200"));
  41   EXPECT_EQ(3, columnWidthUTF8("q\344\270\200"));
  42   EXPECT_EQ(3, columnWidthUTF8("\314\200\340\270\201\344\270\200"));
  43
  44   // Invalid UTF-8 strings, columnWidthUTF8 should error out.
  45   EXPECT_EQ(-2, columnWidthUTF8("\344"));
  46   EXPECT_EQ(-2, columnWidthUTF8("\344\270"));
  47   EXPECT_EQ(-2, columnWidthUTF8("\344\270\033"));
  48   EXPECT_EQ(-2, columnWidthUTF8("\344\270\300"));
  49   EXPECT_EQ(-2, columnWidthUTF8("\377\366\355"));
  50
  51   EXPECT_EQ(-2, columnWidthUTF8("qwer\344"));
  52   EXPECT_EQ(-2, columnWidthUTF8("qwer\344\270"));
  53   EXPECT_EQ(-2, columnWidthUTF8("qwer\344\270\033"));
  54   EXPECT_EQ(-2, columnWidthUTF8("qwer\344\270\300"));
  55   EXPECT_EQ(-2, columnWidthUTF8("qwer\377\366\355"));
  56
  57   // UTF-8 sequences longer than 4 bytes correspond to unallocated Unicode
  58   // characters.
  59   EXPECT_EQ(-2, columnWidthUTF8("\370\200\200\200\200"));     // U+200000
  60   EXPECT_EQ(-2, columnWidthUTF8("\374\200\200\200\200\200")); // U+4000000
  61 }
  62
  63 TEST(Unicode, isPrintable) {
  64   EXPECT_FALSE(isPrintable(0)); // <control-0000>-<control-001F>
  65   EXPECT_FALSE(isPrintable(0x01));
  66   EXPECT_FALSE(isPrintable(0x1F));
  67   EXPECT_TRUE(isPrintable(' '));
  68   EXPECT_TRUE(isPrintable('A'));
  69   EXPECT_TRUE(isPrintable('~'));
  70   EXPECT_FALSE(isPrintable(0x7F)); // <control-007F>..<control-009F>
  71   EXPECT_FALSE(isPrintable(0x90));
  72   EXPECT_FALSE(isPrintable(0x9F));
  73
  74   EXPECT_TRUE(isPrintable(0xAC));
  75   EXPECT_TRUE(isPrintable(0xAD)); // SOFT HYPHEN is displayed on most terminals
  76                                   // as either a space or a dash.
  77   EXPECT_TRUE(isPrintable(0xAE));
  78
  79   EXPECT_TRUE(isPrintable(0x0377));  // GREEK SMALL LETTER PAMPHYLIAN DIGAMMA
  80   EXPECT_FALSE(isPrintable(0x0378)); // <reserved-0378>..<reserved-0379>
  81
  82   EXPECT_FALSE(isPrintable(0x0600)); // ARABIC NUMBER SIGN
  83
  84   EXPECT_FALSE(isPrintable(0x1FFFF)); // <reserved-1F774>..<noncharacter-1FFFF>
  85   EXPECT_TRUE(isPrintable(0x20000));  // CJK UNIFIED IDEOGRAPH-20000
  86
  87   EXPECT_FALSE(isPrintable(0x10FFFF)); // noncharacter
  88 }
  89
  90 } // namespace
  91 } // namespace unicode
  92 } // namespace sys
  93 } // namespace llvm