tests/file.cpp

   1 #include <msp/core/systemerror.h>
   2 #include <msp/io/file.h>
   3 #include <msp/test/test.h>
   4
   5 using namespace std;
   6 using namespace Msp;
   7
   8 class FileTests: public Test::RegisteredTest<FileTests>
   9 {
  10 public:
  11         FileTests();
  12
  13         static const char *get_name() { return "File"; }
  14
  15 private:
  16         void write();
  17         void read();
  18         void seek();
  19         void file_not_found();
  20         void invalid_access();
  21 };
  22
  23
  24 FileTests::FileTests()
  25 {
  26         add(&FileTests::write,          "Writing");
  27         add(&FileTests::read,           "Reading");
  28         add(&FileTests::seek,           "Seeking");
  29         add(&FileTests::file_not_found, "file_not_found").expect_throw<IO::file_not_found>();
  30         add(&FileTests::invalid_access, "invalid_access").expect_throw<IO::invalid_access>();
  31 }
  32
  33 void FileTests::write()
  34 {
  35         IO::File out("test.txt", IO::M_WRITE);
  36         out.write("foobar\n");
  37         out.write("quux\n");
  38 }
  39
  40 void FileTests::read()
  41 {
  42         IO::File in("test.txt");
  43
  44         string line;
  45         EXPECT(in.getline(line));
  46         EXPECT_EQUAL(line, "foobar");
  47
  48         char buf[128];
  49         unsigned len = in.read(buf, sizeof(buf));
  50         EXPECT_EQUAL(len, 5U);
  51         EXPECT_EQUAL(string(buf, len), "quux\n");
  52
  53         len = in.read(buf, sizeof(buf));
  54         EXPECT_EQUAL(len, 0U);
  55         EXPECT(in.eof());
  56 }
  57
  58 void FileTests::seek()
  59 {
  60         IO::File in("test.txt");
  61
  62         IO::SeekOffset pos = in.seek(3, IO::S_BEG);
  63         EXPECT_EQUAL(pos, 3);
  64         char c = in.get();
  65         EXPECT_EQUAL(c, 'b');
  66
  67         pos = in.seek(1, IO::S_CUR);
  68         EXPECT_EQUAL(pos, 5);
  69         c = in.get();
  70         EXPECT_EQUAL(c, 'r');
  71
  72         pos = in.seek(-2, IO::S_END);
  73         EXPECT_EQUAL(pos, 10);
  74         c = in.get();
  75         EXPECT_EQUAL(c, 'x');
  76 }
  77
  78 void FileTests::file_not_found()
  79 {
  80         IO::File in("does.not.exist");
  81 }
  82
  83 void FileTests::invalid_access()
  84 {
  85         IO::File in("test.txt");
  86         in.write("foo\n");
  87 }