Handle test reports with no test cases

__tests__/dart-json.test.ts

@@ -7,6 +7,22 @@ import {getReport} from '../src/report/get-report'
 import {normalizeFilePath} from '../src/utils/path-utils'
 
 describe('dart-json tests', () => {
+  it('produces empty test run result when there are no test cases', async () => {
+    const fixturePath = path.join(__dirname, 'fixtures', 'empty', 'dart-json.json')
+    const filePath = normalizeFilePath(path.relative(__dirname, fixturePath))
+    const fileContent = fs.readFileSync(fixturePath, {encoding: 'utf8'})
+
+    const opts: ParseOptions = {
+      parseErrors: true,
+      trackedFiles: []
+    }
+
+    const parser = new DartJsonParser(opts, 'dart')
+    const result = await parser.parse(filePath, fileContent)
+    expect(result.tests).toBe(0)
+    expect(result.result).toBe('success')
+  })
+
   it('matches report snapshot', async () => {
     const opts: ParseOptions = {
       parseErrors: true,

__tests__/dotnet-trx.test.ts

@@ -7,6 +7,22 @@ import {getReport} from '../src/report/get-report'
 import {normalizeFilePath} from '../src/utils/path-utils'
 
 describe('dotnet-trx tests', () => {
+  it('produces empty test run result when there are no test cases', async () => {
+    const fixturePath = path.join(__dirname, 'fixtures', 'empty', 'dotnet-trx.trx')
+    const filePath = normalizeFilePath(path.relative(__dirname, fixturePath))
+    const fileContent = fs.readFileSync(fixturePath, {encoding: 'utf8'})
+
+    const opts: ParseOptions = {
+      parseErrors: true,
+      trackedFiles: []
+    }
+
+    const parser = new DotnetTrxParser(opts)
+    const result = await parser.parse(filePath, fileContent)
+    expect(result.tests).toBe(0)
+    expect(result.result).toBe('success')
+  })
+
   it('matches report snapshot', async () => {
     const fixturePath = path.join(__dirname, 'fixtures', 'dotnet-trx.trx')
     const outputPath = path.join(__dirname, '__outputs__', 'dotnet-trx.md')

__tests__/fixtures/empty/dart-json.json

@@ -0,0 +1,9 @@
+{"protocolVersion":"0.1.1","runnerVersion":"1.15.4","pid":21320,"type":"start","time":0}
+{"suite":{"id":0,"platform":"vm","path":"test\\main_test.dart"},"type":"suite","time":0}
+{"test":{"id":1,"name":"loading test\\main_test.dart","suiteID":0,"groupIDs":[],"metadata":{"skip":false,"skipReason":null},"line":null,"column":null,"url":null},"type":"testStart","time":1}
+{"suite":{"id":2,"platform":"vm","path":"test\\second_test.dart"},"type":"suite","time":11}
+{"test":{"id":3,"name":"loading test\\second_test.dart","suiteID":2,"groupIDs":[],"metadata":{"skip":false,"skipReason":null},"line":null,"column":null,"url":null},"type":"testStart","time":11}
+{"count":2,"type":"allSuites","time":11}
+{"testID":1,"result":"success","skipped":false,"hidden":true,"type":"testDone","time":4018}
+{"testID":3,"result":"success","skipped":false,"hidden":true,"type":"testDone","time":4025}
+{"success":true,"type":"done","time":4029}

__tests__/fixtures/empty/dotnet-trx.trx

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TestRun id="80e4c095-f726-4ab2-9441-416daa162672" name="..." runUser="..." xmlns="http://microsoft.com/schemas/VisualStudio/TeamTest/2010">
+  <Times creation="2021-02-26T10:36:33.7131022+02:00" queuing="2021-02-26T10:36:33.7131029+02:00" start="2021-02-26T10:36:33.3278956+02:00" finish="2021-02-26T10:36:33.7139830+02:00" />
+  <TestSettings name="default" id="863a1d8b-ee3b-45f9-86ee-1869bc4e889f">
+    <Deployment runDeploymentRoot="..." />
+  </TestSettings>
+  <TestLists>
+    <TestList name="Results Not in a List" id="8c84fa94-04c1-424b-9868-57a2d4851a1d" />
+    <TestList name="All Loaded Results" id="19431567-8539-422a-85d7-44ee4e166bda" />
+  </TestLists>
+  <ResultSummary outcome="Completed">
+    <Counters total="0" executed="0" passed="0" failed="0" error="0" timeout="0" aborted="0" inconclusive="0" passedButRunAborted="0" notRunnable="0" notExecuted="0" disconnected="0" warning="0" completed="0" inProgress="0" pending="0" />
+    <RunInfos>
+      <RunInfo computerName="..." outcome="Warning" timestamp="2021-02-26T10:36:33.6676104+02:00">
+        <Text>No test is available in (...). Make sure that test discoverer &amp; executors are registered and platform &amp; framework version settings are appropriate and try again.</Text>
+      </RunInfo>
+    </RunInfos>
+  </ResultSummary>
+</TestRun>

__tests__/fixtures/empty/jest-junit.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<testsuites name="jest tests" tests="0" failures="0" errors="0" time="11.299">
+</testsuites>

__tests__/jest-junit.test.ts

@@ -7,6 +7,22 @@ import {getReport} from '../src/report/get-report'
 import {normalizeFilePath} from '../src/utils/path-utils'
 
 describe('jest-junit tests', () => {
+  it('produces empty test run result when there are no test cases', async () => {
+    const fixturePath = path.join(__dirname, 'fixtures', 'empty', 'jest-junit.xml')
+    const filePath = normalizeFilePath(path.relative(__dirname, fixturePath))
+    const fileContent = fs.readFileSync(fixturePath, {encoding: 'utf8'})
+
+    const opts: ParseOptions = {
+      parseErrors: true,
+      trackedFiles: []
+    }
+
+    const parser = new JestJunitParser(opts)
+    const result = await parser.parse(filePath, fileContent)
+    expect(result.tests).toBe(0)
+    expect(result.result).toBe('success')
+  })
+
   it('report from ./reports/jest test results matches snapshot', async () => {
     const fixturePath = path.join(__dirname, 'fixtures', 'jest-junit.xml')
     const outputPath = path.join(__dirname, '__outputs__', 'jest-junit.md')