Add VPN API smoke and unit tests; Test implementation support

[shai-almog]

Motivation

• Provide runtime and unit test coverage for the new best-effort VPN detection APIs so API invocations are safe and behavior can be tested deterministically.
• Make the test implementation controllable so unit tests can assert NetworkManager delegation without relying on platform networking.

Description

• Added a Hello app smoke test VPNDetectionAPITest that calls NetworkManager.getInstance().isVPNDetectionSupported() and NetworkManager.getInstance().isVPNActive() and registered it in Cn1ssDeviceRunner.
• Added a core unit test vpnDelegatesToImplementation() in maven/core-unittests/src/test/java/com/codename1/io/NetworkManagerTest.java that verifies NetworkManager delegates the VPN APIs to the implementation.
• Extended TestCodenameOneImplementation with vpnDetectionSupported and vpnActive fields, a setVPNState(boolean, boolean) helper, and overrides for isVPNDetectionSupported() and isVPNActive() to allow deterministic testing.
• Kept the platform wiring and documentation in place (Android/iOS heuristics and docs/developer-guide/io.asciidoc updates) so the APIs are implemented and documented across ports.

Testing

• Ran core unit tests with cd maven && mvn -pl core-unittests -am -DunitTests=true -Dmaven.javadoc.skip=true -DfailIfNoTests=false -Dtest=NetworkManagerTest test, and the suite passed including the new vpnDelegatesToImplementation test.
• Attempted to run the HelloCodenameOne module with cd scripts/hellocodenameone/common && mvn test -DskipTests=false, but it failed in this environment due to an unresolved com.codenameone:codenameone-maven-plugin:8.0-SNAPSHOT artifact (environment limitation).

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Codex Task

[github-actions]

Developer Guide build artifacts are available for download from this workflow run:

• Developer Guide HTML package
• Developer Guide PDF
• AsciiDoc linter report
• Vale report
• Unused image report

Developer Guide quality checks:

• AsciiDoc linter: No issues found (report)
• Vale: 18773 alert(s) (2767 errors, 6368 warnings, 9638 suggestions) (exit code 1) (report)
• Image references: No unused images detected (report)

[github-actions]

✅ Continuous Quality Report

Test & Coverage

• ✅ Tests: 2301 total, 0 failed, 0 skipped
• 📊 Line coverage: 53.01% [HTML preview] [Download]
  • Lowest covered classes
    • com.codename1.ui.Display$EdtException – 0.00%
    • com.codename1.ui.plaf.CSSBorder$LinearGradient – 0.00%
    • com.codename1.util.EasyThread$InQueueRunnable – 0.00%
    • com.codename1.components.FloatingActionButton$ReleaseActionListener – 0.00%
    • com.codename1.io.Oauth2$ShowAuthenticationActionListener – 0.00%
    • com.codename1.io.Oauth2$RefreshTokenActionListener – 0.00%
    • com.codename1.util.EasyThread$RunAndWaitRunnable – 0.00%
    • com.codename1.components.ToastBar$FlushAnimationCallback – 0.00%
    • com.codename1.ui.plaf.CSSBorder$ColorStop – 0.00%
    • com.codename1.ui.ElevationComparator – 0.00%

Static Analysis

• SpotBugs [HTML preview] [Download]
  • ❌ ByteCodeTranslator: 97 findings (High: 2, Normal: 68, Low: 27)
    • Top findings
      • High: com/codename1/tools/translator/BytecodeMethod.java:559 – Method com.codename1.tools.translator.BytecodeMethod.findWritableFields(Set) seems to be useless (rule: UC_USELESS_VOID_METHOD)
      • High: com/codename1/tools/translator/bytecodes/TryCatch.java:75 – Write to static field com.codename1.tools.translator.bytecodes.TryCatch.hasTryCatch from instance method com.codename1.tools.translator.bytecodes.TryCatch.appendInstruction(StringBuilder, List) (rule: ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD)
      • Normal: com/codename1/tools/translator/ByteCodeClass.java:1791 – com.codename1.tools.translator.ByteCodeClass.getBaseClassObject() may expose internal representation by returning ByteCodeClass.baseClassObject (rule: EI_EXPOSE_REP)
      • …and 94 more
  • ❌ android: 412 findings (High: 24, Normal: 196, Low: 192)
    • Top findings
      • High: CodenameOne/src/com/codename1/impl/CodenameOneThread.java:48 – com.codename1.impl.CodenameOneThread.STACK_FRAME_SIZE isn't final but should be (rule: MS_SHOULD_BE_FINAL)
      • High: com/codename1/impl/android/AndroidImplementation.java:1066 – Write to static field com.codename1.impl.android.AndroidImplementation.context from instance method com.codename1.impl.android.AndroidImplementation.setContext(Context) (rule: ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD)
      • High: com/codename1/impl/android/AndroidImplementation.java:1267 – com.codename1.impl.android.AndroidImplementation.isDarkMode() has Boolean return type and returns explicit null (rule: NP_BOOLEAN_RETURN_NULL)
      • …and 409 more
  • ❌ codenameone-maven-plugin: 480 findings (High: 1, Normal: 316, Low: 163)
    • Top findings
      • High: com/codename1/maven/AbstractCN1Mojo.java:807 – com.codename1.maven.AbstractCN1Mojo.OS isn't final but should be (rule: MS_SHOULD_BE_FINAL)
      • Normal: com/codename1/builders/AndroidGradleBuilder.java:1018 – Dead store to googleServicesJson in com.codename1.builders.AndroidGradleBuilder.build(File, BuildRequest) (rule: DLS_DEAD_LOCAL_STORE)
      • Normal: com/codename1/builders/AndroidGradleBuilder.java:1043 – Possible null pointer dereference in com.codename1.builders.AndroidGradleBuilder.build(File, BuildRequest) due to return value of called method (rule: NP_NULL_ON_SOME_PATH_FROM_RETURN_VALUE)
      • …and 477 more
  • ✅ core-unittests: 0 findings (no issues)
  • ❌ ios: 125 findings (High: 4, Normal: 75, Low: 46)
    • Top findings
      • High: com/codename1/impl/ios/IOSImplementation.java:1222 – com.codename1.impl.ios.IOSImplementation.isDarkMode() has Boolean return type and returns explicit null (rule: NP_BOOLEAN_RETURN_NULL)
      • High: com/codename1/impl/ios/IOSImplementation.java:128 – com.codename1.impl.ios.IOSImplementation.nativeInstance isn't final but should be (rule: MS_SHOULD_BE_FINAL)
      • High: com/codename1/impl/ios/IOSImplementation.java:213 – Write to static field com.codename1.impl.ios.IOSImplementation.instance from instance method com.codename1.impl.ios.IOSImplementation.init(Object) (rule: ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD)
      • …and 122 more
• ✅ PMD: 0 findings (no issues) [Report archive]
• ✅ Checkstyle: 0 findings (no issues) [Report archive]

Generated automatically by the PR CI workflow.

[shai-almog]

Compared 31 screenshots: 31 matched.

Native Android coverage

• 📊 Line coverage: 7.21% (3659/50766 lines covered) [HTML preview] (artifact android-coverage-report, jacocoAndroidReport/html/index.html)
  • Other counters: instruction 5.62% (17966/319632), branch 2.73% (848/31097), complexity 3.35% (995/29714), method 5.90% (816/13834), class 9.63% (176/1827)
  • Lowest covered classes
    • kotlin.collections.kotlin.collections.ArraysKt___ArraysKt – 0.00% (0/6327 lines covered)
    • kotlin.collections.unsigned.kotlin.collections.unsigned.UArraysKt___UArraysKt – 0.00% (0/2384 lines covered)
    • org.jacoco.agent.rt.internal_b6258fc.asm.org.jacoco.agent.rt.internal_b6258fc.asm.ClassReader – 0.00% (0/1519 lines covered)
    • kotlin.collections.kotlin.collections.CollectionsKt___CollectionsKt – 0.00% (0/1148 lines covered)
    • org.jacoco.agent.rt.internal_b6258fc.asm.org.jacoco.agent.rt.internal_b6258fc.asm.MethodWriter – 0.00% (0/923 lines covered)
    • kotlin.sequences.kotlin.sequences.SequencesKt___SequencesKt – 0.00% (0/712 lines covered)
    • kotlin.text.kotlin.text.StringsKt___StringsKt – 0.00% (0/623 lines covered)
    • org.jacoco.agent.rt.internal_b6258fc.asm.org.jacoco.agent.rt.internal_b6258fc.asm.Frame – 0.00% (0/564 lines covered)
    • kotlin.collections.kotlin.collections.ArraysKt___ArraysJvmKt – 0.00% (0/495 lines covered)
    • kotlinx.coroutines.kotlinx.coroutines.JobSupport – 0.00% (0/423 lines covered)

✅ Native Android screenshot tests passed.

Native Android coverage

• 📊 Line coverage: 7.21% (3659/50766 lines covered) [HTML preview] (artifact android-coverage-report, jacocoAndroidReport/html/index.html)
  • Other counters: instruction 5.62% (17966/319632), branch 2.73% (848/31097), complexity 3.35% (995/29714), method 5.90% (816/13834), class 9.63% (176/1827)
  • Lowest covered classes
    • kotlin.collections.kotlin.collections.ArraysKt___ArraysKt – 0.00% (0/6327 lines covered)
    • kotlin.collections.unsigned.kotlin.collections.unsigned.UArraysKt___UArraysKt – 0.00% (0/2384 lines covered)
    • org.jacoco.agent.rt.internal_b6258fc.asm.org.jacoco.agent.rt.internal_b6258fc.asm.ClassReader – 0.00% (0/1519 lines covered)
    • kotlin.collections.kotlin.collections.CollectionsKt___CollectionsKt – 0.00% (0/1148 lines covered)
    • org.jacoco.agent.rt.internal_b6258fc.asm.org.jacoco.agent.rt.internal_b6258fc.asm.MethodWriter – 0.00% (0/923 lines covered)
    • kotlin.sequences.kotlin.sequences.SequencesKt___SequencesKt – 0.00% (0/712 lines covered)
    • kotlin.text.kotlin.text.StringsKt___StringsKt – 0.00% (0/623 lines covered)
    • org.jacoco.agent.rt.internal_b6258fc.asm.org.jacoco.agent.rt.internal_b6258fc.asm.Frame – 0.00% (0/564 lines covered)
    • kotlin.collections.kotlin.collections.ArraysKt___ArraysJvmKt – 0.00% (0/495 lines covered)
    • kotlinx.coroutines.kotlinx.coroutines.JobSupport – 0.00% (0/423 lines covered)

[shai-almog]

Compared 31 screenshots: 31 matched.
✅ Native Android screenshot tests passed.

Benchmark Results

• VM Translation Time: 340 seconds
• Compilation Time: 411 seconds

Detailed Performance Metrics

Metric	Duration
Build Time Statistics
Setup & Unzip	31424 ms
Extract Extensions	26 ms
Google Services Setup	2 ms
Scan Classes	625 ms
Extract Libs	1172 ms
Inject Build Hints	52 ms
Generate Unit Tests	2 ms
Generate Stubs	1020 ms
Compile Stubs	2326 ms
Generate Icons	1068 ms
Prepare ParparVM	217 ms
ParparVM Execution	195613 ms
Post-VM Setup	203 ms
CocoaPods	6928 ms
Finalize	40 ms
Total Time	240720 msMaven Overhead : 100000 ms
CocoaPods Install (Script)	2000 ms
Simulator Boot	180000 ms
Simulator Boot (Run)	3000 ms
App Install	29000 ms
App Launch	84000 ms
Test Execution	233000 ms