Function TestPinFile

fs/cache/cache_test.go:195–262

(t *testing.T)

}

func TestPinFile(t *testing.T) {
	defer ClearMappings()
	create := mockNewFs(t)

	// Test pinning and unpinning nonexistent
	f, err := mockfs.NewFs(context.Background(), "mock", "/file.txt", nil)
	require.NoError(t, err)
	Pin(f)
	Unpin(f)

	// Now test pinning an existing
	f2, err := GetFn(context.Background(), "mock:/file.txt", create)
	require.Equal(t, fs.ErrorIsFile, err)
	assert.Equal(t, 1, len(childParentMap))

	Pin(f2)
	assert.Equal(t, 1, Entries())
	pinned, unpinned := EntriesWithPinCount()
	assert.Equal(t, 1, pinned)
	assert.Equal(t, 0, unpinned)

	Unpin(f2)
	assert.Equal(t, 1, Entries())
	pinned, unpinned = EntriesWithPinCount()
	assert.Equal(t, 0, pinned)
	assert.Equal(t, 1, unpinned)

	// try a different child of the same parent, and parent
	// should not add additional cache items
	called = 0 // this one does create() because we haven't seen it before and don't yet know it's a file
	f3, err := GetFn(context.Background(), "mock:/file2.txt", create)
	assert.Equal(t, fs.ErrorIsFile, err)
	assert.Equal(t, 1, Entries())
	assert.Equal(t, 2, len(childParentMap))

	parent, err := GetFn(context.Background(), "mock:/", create)
	assert.NoError(t, err)
	assert.Equal(t, 1, Entries())
	assert.Equal(t, 2, len(childParentMap))

	Pin(f3)
	assert.Equal(t, 1, Entries())
	pinned, unpinned = EntriesWithPinCount()
	assert.Equal(t, 1, pinned)
	assert.Equal(t, 0, unpinned)

	Unpin(f3)
	assert.Equal(t, 1, Entries())
	pinned, unpinned = EntriesWithPinCount()
	assert.Equal(t, 0, pinned)
	assert.Equal(t, 1, unpinned)

	Pin(parent)
	assert.Equal(t, 1, Entries())
	pinned, unpinned = EntriesWithPinCount()
	assert.Equal(t, 1, pinned)
	assert.Equal(t, 0, unpinned)