Truncate text (#7)

Co-authored-by: Marcin Owsiany <marcin@owsiany.pl>

Author: janisz

main.go

@@ -255,22 +255,22 @@ const (
 	desc = `
 {{- if .Message }}
 {code:title=Message|borderStyle=solid}
-{{ .Message }}
+{{ .Message | truncate }}
 {code}
 {{- end }}
 {{- if .Stderr }}
 {code:title=STDERR|borderStyle=solid}
-{{ .Stderr }}
+{{ .Stderr | truncate }}
 {code}
 {{- end }}
 {{- if .Stdout }}
 {code:title=STDOUT|borderStyle=solid}
-{{ .Stdout }}
+{{ .Stdout | truncate }}
 {code}
 {{- end }}
 {{- if .Error }}
 {code:title=ERROR|borderStyle=solid}
-{{ .Error }}
+{{ .Error | truncate }}
 {code}
 {{- end }}
 
@@ -352,7 +352,7 @@ func (tc *testCase) addSubTest(subTest junit.Test) {
 }
 
 func render(tc testCase, text string) (string, error) {
-	tmpl, err := template.New("test").Parse(text)
+	tmpl, err := template.New("test").Funcs(map[string]any{"truncate": truncate}).Parse(text)
 	if err != nil {
 		return "", err
 	}
@@ -372,3 +372,13 @@ func clearString(str string) string {
 		return ' '
 	}, str)
 }
+
+var maxTextBlockLength = 10000
+
+func truncate(s string) string {
+	runes := []rune(s)
+	if len(runes) > maxTextBlockLength {
+		return string(runes[:maxTextBlockLength]) + "\n … too long, truncated."
+	}
+	return s
+}

main_test.go

@@ -230,4 +230,29 @@ org.spockframework.runtime.ConditionNotSatisfiedError: Condition not satisfied:
 	s, err := tc.summary()
 	assert.NoError(t, err)
 	assert.Equal(t, `DefaultPoliciesTest / Verify policy Apache Struts  CVE-2017-5638 is triggered FAILED`, s)
+
+	maxTextBlockLength = 100
+	actual, err = tc.description()
+	assert.NoError(t, err)
+	assert.Equal(t, `
+{code:title=Message|borderStyle=solid}
+Condition not satisfied:
+
+waitForViolation(deploymentName,  policyName, 60)
+|                |      
+ … too long, truncated.
+{code}
+{code:title=STDOUT|borderStyle=solid}
+?[1;30m21:35:15?[0;39m | ?[34mINFO ?[0;39m | DefaultPoliciesTest       | Starting testcase
+?[1;30m21
+ … too long, truncated.
+{code}
+
+||    ENV     ||      Value           ||
+| BUILD ID     | [1|https://prow.ci.openshift.org/view/gs/origin-ci-test/logs//1]|
+| BUILD TAG    | [|]|
+| JOB NAME     ||
+| CLUSTER      ||
+| ORCHESTRATOR ||
+`, actual)
 }