/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-â
âvi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :viâ
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â Copyright 2020 Justine Alexandra Roberts Tunney                              â
â                                                                              â
â Permission to use, copy, modify, and/or distribute this software for         â
â any purpose with or without fee is hereby granted, provided that the         â
â above copyright notice and this permission notice appear in all copies.      â
â                                                                              â
â THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                â
â WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                â
â WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             â
â AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         â
â DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        â
â PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               â
â TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             â
â PERFORMANCE OF THIS SOFTWARE.                                                â
ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ*/
#include "libc/intrin/bits.h"
#include "libc/stdio/stdio.h"
#include "libc/testlib/testlib.h"

TEST(fgetwc, testAscii_oneChar) {
  FILE *f = fmemopen(NULL, BUFSIZ, "r+");
  EXPECT_EQ('A', fputc('A', f));
  rewind(f);
  EXPECT_EQ('A', fgetc(f));
  fclose(f);
}

TEST(fgetwc, testAscii_twoChar) {
  FILE *f = fmemopen(NULL, BUFSIZ, "r+");
  EXPECT_EQ('A', fputc('A', f));
  EXPECT_EQ('B', fputc('B', f));
  rewind(f);
  EXPECT_EQ('A', fgetc(f));
  EXPECT_EQ('B', fgetc(f));
  fclose(f);
}

TEST(fgetwc, testUnicode_oneChar) {
  FILE *f = fmemopen(NULL, BUFSIZ, "r+");
  EXPECT_EQ(L'ð°', fputwc(L'ð°', f));
  rewind(f);
  EXPECT_EQ(L'ð°', fgetwc(f));
  fclose(f);
}

TEST(fgetwc, testUnicode_oneChar_writtenAsRawUtf8) {
  FILE *f = fmemopen(NULL, BUFSIZ, "r+");
  EXPECT_EQ(0xF0, fputc(0xF0, f));
  EXPECT_EQ(0x90, fputc(0x90, f));
  EXPECT_EQ(0x8C, fputc(0x8C, f));
  EXPECT_EQ(0xB0, fputc(0xB0, f));
  rewind(f);
  EXPECT_EQ(L'ð°', fgetwc(f));
  fclose(f);
}

TEST(fgetwc, testUnicode_undecodableSequences_fallsBackToBinary) {
  FILE *f = fmemopen(NULL, BUFSIZ, "r+");
  EXPECT_EQ(0200, fputc(0200, f));
  EXPECT_EQ(0220, fputc(0220, f));
  EXPECT_EQ(0xF0, fputc(0xF0, f));
  EXPECT_EQ(0x90, fputc(0x90, f));
  EXPECT_EQ(0x8C, fputc(0x8C, f));
  EXPECT_EQ(0xB0, fputc(0xB0, f));
  EXPECT_EQ(0304, fputc(0304, f));
  EXPECT_EQ('a', fputc('a', f));
  rewind(f);
  EXPECT_EQ(0200, fgetwc(f));
  EXPECT_EQ(0220, fgetwc(f));
  EXPECT_EQ(L'ð°', fgetwc(f));
  EXPECT_EQ(0304, fgetwc(f));
  EXPECT_EQ('a', fgetwc(f));
  fclose(f);
}
