예제 #1
0
// TestCreate proves we can create a
// bitmap and its size is as set.
func TestCreate(t *testing.T) {
	for size := range []int{1, 13, 27, 66} {
		b := dbio.NewBitMap(size)
		if b.Size() != size {
			t.Error("size doesn't match")
		}
	}
}
예제 #2
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func TestSet(t *testing.T) {
	b := dbio.NewBitMap(16)
	b.Set(2)
	b.Set(15)

	if !utils.SlicesEqual(b.Bytes(), []byte{0x02, 0x40}) {
		t.Errorf("bytes do not match '%X'", b.Bytes())
	}
}
예제 #3
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// Setting a value twice should not unset it.
func TestSetTwice(t *testing.T) {
	b := dbio.NewBitMap(10)
	b.Set(2)
	if !get(b, 2) {
		t.Error("expected it to be set")
	}
	b.Set(2)
	if !get(b, 2) {
		t.Error("expected it to still be set")
	}
}
예제 #4
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// TestGetOverflow tests dealing with out-of-range issues
// in the Get method.
func TestGetOverflow(t *testing.T) {
	b := dbio.NewBitMap(42)
	_, err := b.Get(52)
	if err != dbio.ErrOutOfRange {
		t.Error("out of range, there should be an error")
	}
	err = b.Set(-1)
	if err != dbio.ErrOutOfRange {
		t.Error("out of range, there should be an error")
	}
}
예제 #5
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// Unset a value.
func TestSetUnset(t *testing.T) {
	b := dbio.NewBitMap(10)
	err := b.Set(2)
	if err != nil {
		t.Error(err)
	}
	if !get(b, 2) {
		t.Error("expected it to be set")
	}
	err = b.Unset(2)
	if err != nil {
		t.Error(err)
	}
	if get(b, 2) {
		t.Error("expected it to be unset")
	}
	b.Unset(2)
	if get(b, 2) {
		t.Error("expected it to still be unset")
	}
}
예제 #6
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func TestGet(t *testing.T) {
	b := dbio.NewBitMap(50)
	b.Set(2)
	if !get(b, 2) {
		t.Error("expected true, got false")
	}
	if get(b, 3) {
		t.Error("expected false, got true")
	}
	b.Set(3)
	if !get(b, 3) {
		t.Error("expected true, got false")
	}
	// Larger number (to prove indexing past the first
	// byte works).
	if get(b, 42) {
		t.Error("expected false, got true")
	}
	b.Set(42)
	if !get(b, 42) {
		t.Error("expected true, got false")
	}
}
예제 #7
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func ExampleBitmap() {
	b := dbio.NewBitMap(10)
	b.Set(2)
	fmt.Printf("2 in bitmap: %v. 7 in bitmap: %v.\n", get(b, 2), get(b, 7))
	// Output: 2 in bitmap: true. 7 in bitmap: false.
}