55 lines
1023 B
Go
55 lines
1023 B
Go
package logger
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import (
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"errors"
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"io/ioutil"
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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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type errReader struct{}
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func (errReader) Read(_ []byte) (n int, err error) {
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return 0, errors.New("test error")
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}
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func TestLoggerPeek(t *testing.T) {
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cases := []struct {
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body string
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n int64
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excerpt string
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hasMore bool
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}{
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{"", -1, "", false},
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{"", 0, "", false},
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{"", 1024, "", false},
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{"123456", -1, "", true},
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{"123456", 0, "", true},
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{"123456", 4, "1234", true},
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{"123456", 5, "12345", true},
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{"123456", 6, "123456", false},
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{"123456", 7, "123456", false},
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}
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for _, c := range cases {
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r, excerpt, hasMore, err := peek(strings.NewReader(c.body), c.n)
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if !assert.NoError(t, err) {
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continue
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}
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body, err := ioutil.ReadAll(r)
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if !assert.NoError(t, err) {
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continue
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}
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assert.Equal(t, c.body, string(body))
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assert.Equal(t, c.excerpt, excerpt)
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assert.Equal(t, c.hasMore, hasMore)
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}
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_, _, _, err := peek(errReader{}, 1024)
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assert.Error(t, err)
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}
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