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add unit test for basic undo/redo of erases

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This commit is contained in:
Josh Holtrop 2017-01-15 20:06:08 -05:00
parent 441c33821e
commit 6ba280e75d
1 changed files with 49 additions and 0 deletions
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49
test/src/test_Buffer.cc
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@ -193,3 +193,52 @@ TEST(BufferTest, allows_undo_and_redo_of_inserts)
EXPECT_EQ(ss("12abc\nd3ef$\nghi\n"), b.get_string());
EXPECT_EQ(C('d'), **it);
}
TEST(BufferTest, allows_undo_and_redo_of_erases)
{
std::string s("abc\ndef\nghi\n");
Buffer b((const uint8_t *)&s[0], s.size());
auto it = b.add_cursor();
b.erase_code_point(*it);
EXPECT_EQ(ss("bc\ndef\nghi\n"), b.get_string());
EXPECT_EQ(C('b'), **it);
it->go_next_line();
it->go_right_in_line(false);
b.erase_code_point(*it);
EXPECT_EQ(ss("bc\ndf\nghi\n"), b.get_string());
EXPECT_EQ(C('f'), **it);
it->go_end_of_line(true);
b.erase_code_point(*it);
EXPECT_EQ(ss("bc\ndfghi\n"), b.get_string());
EXPECT_EQ(C('g'), **it);
it->go_left_in_line();
EXPECT_EQ(C('f'), **it);
b.undo();
EXPECT_EQ(ss("bc\ndf\nghi\n"), b.get_string());
EXPECT_EQ(C('f'), **it);
b.undo();
EXPECT_EQ(ss("bc\ndef\nghi\n"), b.get_string());
EXPECT_EQ(C('f'), **it);
b.undo();
EXPECT_EQ(ss("abc\ndef\nghi\n"), b.get_string());
EXPECT_EQ(C('f'), **it);
b.redo();
EXPECT_EQ(ss("bc\ndef\nghi\n"), b.get_string());
EXPECT_EQ(C('f'), **it);
b.redo();
EXPECT_EQ(ss("bc\ndf\nghi\n"), b.get_string());
EXPECT_EQ(C('f'), **it);
b.redo();
EXPECT_EQ(ss("bc\ndfghi\n"), b.get_string());
EXPECT_EQ(C('f'), **it);
}