mirror of https://github.com/dapr/kit.git
125 lines
3.7 KiB
Go
125 lines
3.7 KiB
Go
/*
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Copyright 2023 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package streams
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import (
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"io"
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"strings"
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestLimitReadCloser(t *testing.T) {
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t.Run("stream shorter than limit", func(t *testing.T) {
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s := LimitReadCloser(io.NopCloser(strings.NewReader("e ho guardato dentro un'emozione")), 1000)
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read, err := io.ReadAll(s)
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require.NoError(t, err)
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require.Equal(t, "e ho guardato dentro un'emozione", string(read))
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// Reading again should return io.EOF
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n, err := s.Read(read)
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require.ErrorIs(t, err, io.EOF)
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require.Equal(t, 0, n)
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})
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t.Run("stream has same length as limit", func(t *testing.T) {
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s := LimitReadCloser(io.NopCloser(strings.NewReader("e ci ho visto dentro tanto amore")), 32)
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read, err := io.ReadAll(s)
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require.NoError(t, err)
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require.Equal(t, "e ci ho visto dentro tanto amore", string(read))
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// Reading again should return io.EOF
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n, err := s.Read(read)
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require.ErrorIs(t, err, io.EOF)
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require.Equal(t, 0, n)
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})
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t.Run("stream longer than limit", func(t *testing.T) {
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s := LimitReadCloser(io.NopCloser(strings.NewReader("che ho capito perche' non si comanda al cuore")), 21)
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read, err := io.ReadAll(s)
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require.Error(t, err)
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require.ErrorIs(t, err, ErrStreamTooLarge)
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require.Equal(t, "che ho capito perche'", string(read))
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// Reading again should return ErrStreamTooLarge again
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n, err := s.Read(read)
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require.ErrorIs(t, err, ErrStreamTooLarge)
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require.Equal(t, 0, n)
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})
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t.Run("stream longer than limit, read with byte slice", func(t *testing.T) {
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s := LimitReadCloser(io.NopCloser(strings.NewReader("e va bene cosi'")), 4)
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read := make([]byte, 100)
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n, err := s.Read(read)
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require.Error(t, err)
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require.ErrorIs(t, err, ErrStreamTooLarge)
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require.Equal(t, "e va", string(read[0:n]))
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// Reading again should return ErrStreamTooLarge again
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n, err = s.Read(read)
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require.ErrorIs(t, err, ErrStreamTooLarge)
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require.Equal(t, 0, n)
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})
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t.Run("read in two segments", func(t *testing.T) {
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s := LimitReadCloser(io.NopCloser(strings.NewReader("senza parole")), 9)
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read := make([]byte, 5)
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n, err := s.Read(read)
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require.NoError(t, err)
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require.Equal(t, "senza", string(read[0:n]))
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n, err = s.Read(read)
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require.Error(t, err)
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require.ErrorIs(t, err, ErrStreamTooLarge)
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require.Equal(t, " par", string(read[0:n]))
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// Reading again should return ErrStreamTooLarge again
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n, err = s.Read(read)
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require.ErrorIs(t, err, ErrStreamTooLarge)
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require.Equal(t, 0, n)
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})
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t.Run("close early", func(t *testing.T) {
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s := LimitReadCloser(io.NopCloser(strings.NewReader("senza parole")), 10)
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// Read 5 bytes then close
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read := make([]byte, 5)
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n, err := s.Read(read)
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require.NoError(t, err)
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require.Equal(t, "senza", string(read[0:n]))
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// Reading should now return io.EOF
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err = s.Close()
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require.NoError(t, err)
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n, err = s.Read(read)
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require.Error(t, err)
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require.ErrorIs(t, err, io.EOF)
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require.Equal(t, 0, n)
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})
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t.Run("stream is nil", func(t *testing.T) {
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s := LimitReadCloser(nil, 10)
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// Reading should return ErrStreamTooLarge again
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n, err := s.Read(make([]byte, 10))
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require.ErrorIs(t, err, ErrStreamTooLarge)
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require.Equal(t, 0, n)
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})
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}
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