81 lines
1.6 KiB
Go
81 lines
1.6 KiB
Go
package media_test
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import (
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"io"
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"testing"
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"git.netflux.io/rob/clipper/media"
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"github.com/stretchr/testify/assert"
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)
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type testReader struct {
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count int
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data [][]byte
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}
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func (r *testReader) Read(p []byte) (int, error) {
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if r.count == len(r.data) {
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return 0, io.EOF
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}
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n := copy(p, r.data[r.count])
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r.count++
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return n, nil
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}
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func TestModuloBufReader(t *testing.T) {
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reader := testReader{
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data: [][]byte{
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{'a', 'b', 'c', 'd'},
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{'e', 'f', 'g', 'h', 'i'},
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{},
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{'j', 'k', 'l', 'm'},
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{'n', 'o', 'p'},
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{'q', 'r', 's', 't', 'u'},
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},
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}
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modReader := media.NewModuloBufReader(io.NopCloser(&reader), 4)
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out := make([]byte, 5)
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n, err := modReader.Read(out)
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assert.NoError(t, err)
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assert.Equal(t, 4, n)
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assert.Equal(t, []byte{'a', 'b', 'c', 'd'}, out[:n])
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n, err = modReader.Read(out)
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assert.NoError(t, err)
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assert.Equal(t, 4, n)
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assert.Equal(t, []byte{'e', 'f', 'g', 'h'}, out[:n])
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n, err = modReader.Read(out)
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assert.NoError(t, err)
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assert.Zero(t, n)
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assert.Empty(t, out[:n])
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n, err = modReader.Read(out)
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assert.NoError(t, err)
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assert.NoError(t, err)
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assert.Equal(t, 4, n)
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assert.Equal(t, []byte{'i', 'j', 'k', 'l'}, out[:n])
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n, err = modReader.Read(out)
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assert.NoError(t, err)
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assert.Equal(t, 4, n)
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assert.Equal(t, []byte{'m', 'n', 'o', 'p'}, out[:n])
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n, err = modReader.Read(out)
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assert.NoError(t, err)
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assert.Equal(t, 4, n)
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assert.Equal(t, []byte{'q', 'r', 's', 't'}, out[:n])
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n, err = modReader.Read(out)
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assert.Equal(t, io.EOF, err)
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assert.Equal(t, 1, n)
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assert.Equal(t, []byte{'u'}, out[:n])
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n, err = modReader.Read(out)
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assert.Zero(t, n)
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assert.Equal(t, io.EOF, err)
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}
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