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66 lines
1.6 KiB
66 lines
1.6 KiB
// Copyright 2023 The Gitea Authors. All rights reserved. |
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// SPDX-License-Identifier: MIT |
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package util |
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import ( |
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"bytes" |
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"errors" |
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"testing" |
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"github.com/stretchr/testify/assert" |
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) |
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type readerWithError struct { |
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buf *bytes.Buffer |
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} |
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func (r *readerWithError) Read(p []byte) (n int, err error) { |
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if r.buf.Len() < 2 { |
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return 0, errors.New("test error") |
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} |
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return r.buf.Read(p) |
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} |
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func TestReadWithLimit(t *testing.T) { |
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bs := []byte("0123456789abcdef") |
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// normal test |
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buf, err := readWithLimit(bytes.NewBuffer(bs), 5, 2) |
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assert.NoError(t, err) |
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assert.Equal(t, []byte("01"), buf) |
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buf, err = readWithLimit(bytes.NewBuffer(bs), 5, 5) |
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assert.NoError(t, err) |
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assert.Equal(t, []byte("01234"), buf) |
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buf, err = readWithLimit(bytes.NewBuffer(bs), 5, 6) |
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assert.NoError(t, err) |
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assert.Equal(t, []byte("012345"), buf) |
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buf, err = readWithLimit(bytes.NewBuffer(bs), 5, len(bs)) |
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assert.NoError(t, err) |
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assert.Equal(t, []byte("0123456789abcdef"), buf) |
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buf, err = readWithLimit(bytes.NewBuffer(bs), 5, 100) |
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assert.NoError(t, err) |
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assert.Equal(t, []byte("0123456789abcdef"), buf) |
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// test with error |
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buf, err = readWithLimit(&readerWithError{bytes.NewBuffer(bs)}, 5, 10) |
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assert.NoError(t, err) |
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assert.Equal(t, []byte("0123456789"), buf) |
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buf, err = readWithLimit(&readerWithError{bytes.NewBuffer(bs)}, 5, 100) |
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assert.ErrorContains(t, err, "test error") |
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assert.Empty(t, buf) |
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// test public function |
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buf, err = ReadWithLimit(bytes.NewBuffer(bs), 2) |
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assert.NoError(t, err) |
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assert.Equal(t, []byte("01"), buf) |
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buf, err = ReadWithLimit(bytes.NewBuffer(bs), 9999999) |
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assert.NoError(t, err) |
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assert.Equal(t, []byte("0123456789abcdef"), buf) |
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}
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