Add a junithelper for creating a junit result from command (#926)

* Add a junithelper for creating a junit result from command

* Fix typo

test/junit/junit.go

@@ -95,6 +95,10 @@ func (testCase *TestCase) AddProperty(name, val string) {
 
 // AddTestCase adds a testcase to the testsuite
 func (ts *TestSuite) AddTestCase(tc TestCase) {
+	ts.Tests++
+	if tc.GetTestStatus() == Failed {
+		ts.Failures++
+	}
 	ts.TestCases = append(ts.TestCases, tc)
 }
 

testutils/junithelper/README.md

@@ -0,0 +1,22 @@
+## junithelper
+
+junithelper is a tool for creating a simple junit test result, which is
+used for creating a single junit result file with a single test
+
+## Usage
+
+This tool can be invoked from command line with following parameters:
+
+- `--suite`: name of suite
+- `--name`: name of test
+- `--err-msg`: (optional) error message, by default it's empty, means test
+  passed
+- `--dest`: (optional) file path for result to be written to, default
+  `junit_result.xml`
+
+### Example
+
+```
+go run junithelper --suite foo --name TestBar --err-msg "Failed Randomly" --dest
+"/tmp/junit_important_suite.xml"
+```

testutils/junithelper/main.go

@@ -0,0 +1,57 @@
+/*
+Copyright 2019 The Knative Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"flag"
+	"io/ioutil"
+	"log"
+
+	"knative.dev/pkg/test/junit"
+)
+
+var (
+	suite  string
+	name   string
+	errMsg string
+	dest   string
+)
+
+func main() {
+	flag.StringVar(&suite, "suite", "", "Name of suite")
+	flag.StringVar(&name, "name", "", "Name of test")
+	flag.StringVar(&errMsg, "err-msg", "", "Error message, empty means test passed, default empty")
+	flag.StringVar(&dest, "dest", "junit_result.xml", "Where junit xml writes to")
+	flag.Parse()
+
+	suites := junit.TestSuites{}
+	suite := junit.TestSuite{Name: suite}
+	var errP *string
+	if errMsg != "" {
+		errP = &errMsg
+	}
+	suite.AddTestCase(junit.TestCase{
+		Name:    name,
+		Failure: errP,
+	})
+	suites.AddTestSuite(&suite)
+	contents, err := suites.ToBytes("", "")
+	if err != nil {
+		log.Fatal(err)
+	}
+	ioutil.WriteFile(dest, contents, 0644)
+}