chore: fix test fail

[thinkerou]

now ci have the following output:

[GIN-debug] GET    /recovery                 --> github.com/gin-gonic/gin.TestPanicWithBrokenPipe.func1.1 (2 handlers)
--- FAIL: TestPanicWithBrokenPipe (0.00s)
    --- FAIL: TestPanicWithBrokenPipe/Broken_pipe (0.00s)
        recovery_test.go:111: 
            	Error Trace:	recovery_test.go:111
            	Error:      	"
            	            	
            	            	2018/11/26 03:31:54 : : broken pipe
            	            	GET /recovery HTTP/1.1
            	            	
            	            	
            	            	" does not contain "Broken pipe"
            	Test:       	TestPanicWithBrokenPipe/Broken_pipe
    --- PASS: TestPanicWithBrokenPipe/connection_reset_by_peer (0.00s)
=== RUN   TestResponseWriterReset

update after output:

=== RUN   TestPanicWithBrokenPipe
=== RUN   TestPanicWithBrokenPipe/broken_pipe
[GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production.
 - using env:	export GIN_MODE=release
 - using code:	gin.SetMode(gin.ReleaseMode)
[GIN-debug] GET    /recovery                 --> github.com/gin-gonic/gin.TestPanicWithBrokenPipe.func1.1 (2 handlers)
=== RUN   TestPanicWithBrokenPipe/connection_reset_by_peer
[GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production.
 - using env:	export GIN_MODE=release
 - using code:	gin.SetMode(gin.ReleaseMode)
[GIN-debug] GET    /recovery                 --> github.com/gin-gonic/gin.TestPanicWithBrokenPipe.func1.1 (2 handlers)
--- PASS: TestPanicWithBrokenPipe (0.00s)
    --- PASS: TestPanicWithBrokenPipe/broken_pipe (0.00s)
    --- PASS: TestPanicWithBrokenPipe/connection_reset_by_peer (0.00s)

[codecov]

Codecov Report

Merging #1669 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1669   +/-   ##
=======================================
  Coverage   99.39%   99.39%           
=======================================
  Files          41       41           
  Lines        1993     1993           
=======================================
  Hits         1981     1981           
  Misses          9        9           
  Partials        3        3

---

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