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captureOutput() — fiber Function Reference

Architecture documentation for the captureOutput() function in listen_test.go from the fiber codebase.

Function go FiberCore Routing called by 9

Entity Profile

Dependency Diagram

graph TD
  e606935d_5140_5f32_e530_9b041f7f3116["captureOutput()"]
  edd60c6a_f37d_c392_5301_d2d5a002990a["listen_test.go"]
  e606935d_5140_5f32_e530_9b041f7f3116 -->|defined in| edd60c6a_f37d_c392_5301_d2d5a002990a
  2583b4ec_9c46_ed16_2cbf_7bf63f3e6cea["Test_Listen_Master_Process_Show_Startup_Message()"]
  2583b4ec_9c46_ed16_2cbf_7bf63f3e6cea -->|calls| e606935d_5140_5f32_e530_9b041f7f3116
  cae6d54b_ac1a_33cb_701d_706e7d02d060["Test_Listen_Master_Process_Show_Startup_MessageWithAppName()"]
  cae6d54b_ac1a_33cb_701d_706e7d02d060 -->|calls| e606935d_5140_5f32_e530_9b041f7f3116
  0c15c05d_9e50_9fe1_9dfd_9126ba9cf255["Test_Listen_Master_Process_Show_Startup_MessageWithAppNameNonAscii()"]
  0c15c05d_9e50_9fe1_9dfd_9126ba9cf255 -->|calls| e606935d_5140_5f32_e530_9b041f7f3116
  f2f90094_e2d1_9a16_775d_2a6a61d09e1b["Test_Listen_Master_Process_Show_Startup_MessageWithDisabledPreforkAndCustomEndpoint()"]
  f2f90094_e2d1_9a16_775d_2a6a61d09e1b -->|calls| e606935d_5140_5f32_e530_9b041f7f3116
  e07e8a9a_278d_a581_ee7a_f472bae20167["Test_StartupMessageCustomization()"]
  e07e8a9a_278d_a581_ee7a_f472bae20167 -->|calls| e606935d_5140_5f32_e530_9b041f7f3116
  b8350d31_ef28_a3f8_bb89_ba09c8f47080["Test_StartupMessageDisabledPostHook()"]
  b8350d31_ef28_a3f8_bb89_ba09c8f47080 -->|calls| e606935d_5140_5f32_e530_9b041f7f3116
  092684f5_87f2_33ed_d9cc_2092324f3507["Test_StartupMessagePreventedByHook()"]
  092684f5_87f2_33ed_d9cc_2092324f3507 -->|calls| e606935d_5140_5f32_e530_9b041f7f3116
  27615a06_d832_528b_799a_e7f27b9f62e1["Test_Listen_Print_Route()"]
  27615a06_d832_528b_799a_e7f27b9f62e1 -->|calls| e606935d_5140_5f32_e530_9b041f7f3116
  9e40732b_8b67_a197_c3f0_09419eed9623["Test_Listen_Print_Route_With_Group()"]
  9e40732b_8b67_a197_c3f0_09419eed9623 -->|calls| e606935d_5140_5f32_e530_9b041f7f3116
  style e606935d_5140_5f32_e530_9b041f7f3116 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

listen_test.go lines 869–899

func captureOutput(f func()) string {
	reader, writer, err := os.Pipe()
	if err != nil {
		panic(err)
	}
	stdout := os.Stdout
	stderr := os.Stderr
	defer func() {
		os.Stdout = stdout
		os.Stderr = stderr
		log.SetOutput(os.Stderr)
	}()
	os.Stdout = writer
	os.Stderr = writer
	log.SetOutput(writer)
	out := make(chan string)
	go func() {
		var buf bytes.Buffer
		_, copyErr := io.Copy(&buf, reader)
		if copyErr != nil {
			panic(copyErr)
		}
		out <- buf.String() // this out channel helps in synchronization
	}()
	f()
	err = writer.Close()
	if err != nil {
		panic(err)
	}
	return <-out
}

Domain

Subdomains

Defined In

Called By

Source

Frequently Asked Questions

What does captureOutput() do?
captureOutput() is a function in the fiber codebase, defined in listen_test.go.
Where is captureOutput() defined?
captureOutput() is defined in listen_test.go at line 869.
What calls captureOutput()?
captureOutput() is called by 9 function(s): Test_Listen_Master_Process_Show_Startup_Message, Test_Listen_Master_Process_Show_Startup_MessageWithAppName, Test_Listen_Master_Process_Show_Startup_MessageWithAppNameNonAscii, Test_Listen_Master_Process_Show_Startup_MessageWithDisabledPreforkAndCustomEndpoint, Test_Listen_Print_Route, Test_Listen_Print_Route_With_Group, Test_StartupMessageCustomization, Test_StartupMessageDisabledPostHook, and 1 more.

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