Implement unit tests for QRCodeOnboardingPayload (#27587)

* Implement unit tests for QRCodeOnboardingPayload

* Restyled by gn

* Address review comments

---------

Co-authored-by: Restyled.io <commits@restyled.io>

Author: yufengwangca

.github/workflows/java-tests.yaml

@@ -79,7 +79,8 @@ jobs:
                    chip.tlv.TlvReadWriteTest        \
                    chip.tlv.TlvReaderTest           \
                    chip.jsontlv.JsonToTlvToJsonTest \
-                   chip.onboardingpayload.ManualCodeTest
+                   chip.onboardingpayload.ManualCodeTest \
+                   chip.onboardingpayload.QRCodeTest
             - name: Build Java Matter Controller and all clusters app
               run: |
                   scripts/run_in_build_env.sh './scripts/build_python.sh --install_virtual_env out/venv'

kotlin-detect-config.yaml

@@ -40,6 +40,7 @@ style:
               examples/android/CHIPTest/app/src/androidTest/java/com/tcl/chip/chiptest/ExampleInstrumentedTest.kt"
             - "**/src/controller/java/tests/chip/jsontlv/JsonToTlvToJsonTest.kt"
             - "**/src/controller/java/tests/chip/onboardingpayload/ManualCodeTest.kt"
+            - "**/src/controller/java/tests/chip/onboardingpayload/QRCodeTest.kt"
             - "**/src/controller/java/tests/chip/tlv/TlvReaderTest.kt"
             - "**/src/controller/java/tests/chip/tlv/TlvReadWriteTest.kt"
             - "**/src/controller/java/tests/chip/tlv/TlvWriterTest.kt"
@@ -128,6 +129,7 @@ style:
             - "**/src/controller/java/src/chip/onboardingpayload/OnboardingPayload.kt"
             - "**/src/controller/java/src/chip/onboardingpayload/QRCodeBasicOnboardingPayloadGenerator.kt"
             - "**/src/controller/java/tests/chip/onboardingpayload/ManualCodeTest.kt"
+            - "**/src/controller/java/tests/chip/onboardingpayload/QRCodeTest.kt"
     UnusedParameter:
         excludes:
             - "**/examples/android/CHIPTool/app/src/main/java/com/google/chip/chiptool/bluetooth/BluetoothManager.kt"
@@ -201,6 +203,7 @@ exceptions:
             - "**/examples/java-matter-controller/java/src/com/matter/controller/commands/common/Argument.kt"
             - "**/examples/java-matter-controller/java/src/com/matter/controller/Main.kt"
             - "**/src/controller/java/tests/chip/onboardingpayload/ManualCodeTest.kt"
+            - "**/src/controller/java/tests/chip/onboardingpayload/QRCodeTest.kt"
     SwallowedException:
         excludes:
             - "**/examples/android/CHIPTool/app/src/main/java/com/google/chip/chiptool/clusterclient/SensorClientFragment.kt"
@@ -221,6 +224,7 @@ naming:
             - "**/src/controller/java/tests/chip/tlv/TlvReaderTest.kt"
             - "**/src/controller/java/tests/chip/jsontlv/JsonToTlvToJsonTest.kt"
             - "**/src/controller/java/tests/chip/onboardingpayload/ManualCodeTest.kt"
+            - "**/src/controller/java/tests/chip/onboardingpayload/QRCodeTest.kt"
             - "**/examples/android/CHIPTest/app/src/test/java/com/tcl/chip/chiptest/ExampleUnitTest.kt"
     ConstructorParameterNaming:
         excludes:
@@ -264,6 +268,7 @@ complexity:
             - "**/src/controller/java/src/chip/tlv/TlvWriter.kt"
             - "**/src/controller/java/tests/chip/jsontlv/JsonToTlvToJsonTest.kt"
             - "**/src/controller/java/tests/chip/onboardingpayload/ManualCodeTest.kt"
+            - "**/src/controller/java/tests/chip/onboardingpayload/QRCodeTest.kt"
             - "**/src/controller/java/tests/chip/tlv/TlvReadWriteTest.kt"
     NestedBlockDepth:
         excludes:
@@ -282,6 +287,7 @@ complexity:
             - "**/src/controller/java/src/chip/onboardingpayload/ManualOnboardingPayloadParser.kt"
             - "**/src/controller/java/tests/chip/jsontlv/JsonToTlvToJsonTest.kt"
             - "**/src/controller/java/tests/chip/onboardingpayload/ManualCodeTest.kt"
+            - "**/src/controller/java/tests/chip/onboardingpayload/QRCodeTest.kt"
             - "**/src/controller/java/tests/chip/tlv/TlvReaderTest.kt"
     LargeClass:
         excludes:

src/controller/java/BUILD.gn

@@ -275,10 +275,25 @@ kotlin_library("onboardingpayload_manual_code_test") {
   kotlinc_flags = [ "-Xlint:deprecation" ]
 }
 
+kotlin_library("onboardingpayload_qr_code_test") {
+  output_name = "OnboardingPayloadQRCodeTest.jar"
+
+  deps = [
+    ":onboarding_payload",
+    "${chip_root}/third_party/java_deps:junit-4",
+    "${chip_root}/third_party/java_deps:truth",
+  ]
+
+  sources = [ "tests/chip/onboardingpayload/QRCodeTest.kt" ]
+
+  kotlinc_flags = [ "-Xlint:deprecation" ]
+}
+
 group("unit_tests") {
   deps = [
     ":json_to_tlv_to_json_test",
     ":onboardingpayload_manual_code_test",
+    ":onboardingpayload_qr_code_test",
     ":tlv_read_write_test",
     ":tlv_reader_test",
     ":tlv_writer_test",

src/controller/java/src/chip/onboardingpayload/QRCodeOnboardingPayloadParser.kt

@@ -24,39 +24,6 @@ import java.util.concurrent.atomic.AtomicInteger
  *   to a OnboardingPayload object
  */
 class QRCodeOnboardingPayloadParser(private val mBase38Representation: String) {
-  private fun extractPayload(inString: String): String {
-    var chipSegment = ""
-    val delimiter = '%'
-    val startIndices = mutableListOf<Int>()
-    startIndices.add(0)
-
-    for (i in inString.indices) {
-      if (inString[i] == delimiter) {
-        startIndices.add(i + 1)
-      }
-    }
-
-    // Find the first string between delimiters that starts with kQRCodePrefix
-    for (i in 0 until startIndices.size) {
-      val startIndex = startIndices[i]
-      val endIndex = if (i == startIndices.size - 1) inString.length else startIndices[i + 1] - 1
-      val length = if (endIndex != inString.length) endIndex - startIndex else inString.length
-      val segment = inString.substring(startIndex, startIndex + length)
-
-      // Find a segment that starts with kQRCodePrefix
-      if (segment.startsWith(kQRCodePrefix) && segment.length > kQRCodePrefix.length) {
-        chipSegment = segment
-        break
-      }
-    }
-
-    if (chipSegment.length > 0) {
-      return chipSegment.substring(kQRCodePrefix.length) // strip out prefix before returning
-    }
-
-    return chipSegment
-  }
-
   fun populatePayload(outPayload: OnboardingPayload) {
     var indexToReadFrom: AtomicInteger = AtomicInteger(0)
 
@@ -113,5 +80,14 @@ class QRCodeOnboardingPayloadParser(private val mBase38Representation: String) {
       index.addAndGet(numberOfBitsToRead)
       return dest
     }
+
+    fun extractPayload(inString: String?): String {
+      return inString
+        ?.split('%')
+        ?.filter { s -> s.startsWith(kQRCodePrefix) }
+        ?.firstOrNull()
+        ?.substring(kQRCodePrefix.length)
+        ?: ""
+    }
   }
 }