Added test and CI build

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+
+jobs:
+  android-compile:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: "17"
+          cache: maven
+
+      - name: Set up Android SDK
+        uses: android-actions/setup-android@v3
+
+      - name: Set up Codename One Build Client
+        shell: bash
+        run: |
+          set -euo pipefail
+          mkdir -p "$HOME/.codenameone"
+          curl -fsSL https://github.com/codenameone/CodenameOne/raw/refs/heads/master/maven/CodeNameOneBuildClient.jar \
+            -o "$HOME/.codenameone/CodeNameOneBuildClient.jar"
+
+      - name: Compute snapshot version
+        id: versions
+        shell: bash
+        run: |
+          set -euo pipefail
+          current_version="$(mvn -q -DforceStdout help:evaluate -Dexpression=project.version)"
+          if [[ "$current_version" == *-SNAPSHOT ]]; then
+            snapshot_version="$current_version"
+          else
+            snapshot_version="${current_version}-SNAPSHOT"
+          fi
+          echo "snapshot_version=$snapshot_version" >> "$GITHUB_OUTPUT"
+
+      - name: Build cn1lib snapshot into local Maven repository
+        shell: bash
+        run: |
+          set -euo pipefail
+          mvn -B -ntp versions:set -DnewVersion="${{ steps.versions.outputs.snapshot_version }}" -DgenerateBackupPoms=false
+          mvn -B -ntp -DskipTests install
+
+      - name: Generate Android source project from sample app
+        working-directory: fingerprint-scanner-test
+        shell: bash
+        run: |
+          set -euo pipefail
+          export JAVA17_HOME="$JAVA_HOME"
+          chmod +x mvnw
+          xvfb-run -a ./mvnw -B -ntp package \
+            -DskipTests \
+            -Dopen=false \
+            -Dcodename1.platform=android \
+            -Dcodename1.buildTarget=android-source \
+            -Dfingerprint.scanner.version="${{ steps.versions.outputs.snapshot_version }}"
+
+      - name: Build generated Android Gradle project
+        working-directory: fingerprint-scanner-test/android/target/myappname-android-1.0-SNAPSHOT-android-source
+        shell: bash
+        run: |
+          set -euo pipefail
+          chmod +x gradlew
+          ./gradlew --no-daemon --stacktrace assembleDebug
+
+  ios-compile:
+    runs-on: macos-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: "17"
+          cache: maven
+
+      - name: Set up Codename One Build Client
+        shell: bash
+        run: |
+          set -euo pipefail
+          mkdir -p "$HOME/.codenameone"
+          curl -fsSL https://github.com/codenameone/CodenameOne/raw/refs/heads/master/maven/CodeNameOneBuildClient.jar \
+            -o "$HOME/.codenameone/CodeNameOneBuildClient.jar"
+
+      - name: Compute snapshot version
+        id: versions
+        shell: bash
+        run: |
+          set -euo pipefail
+          current_version="$(mvn -q -DforceStdout help:evaluate -Dexpression=project.version)"
+          if [[ "$current_version" == *-SNAPSHOT ]]; then
+            snapshot_version="$current_version"
+          else
+            snapshot_version="${current_version}-SNAPSHOT"
+          fi
+          echo "snapshot_version=$snapshot_version" >> "$GITHUB_OUTPUT"
+
+      - name: Build cn1lib snapshot into local Maven repository
+        shell: bash
+        run: |
+          set -euo pipefail
+          mvn -B -ntp versions:set -DnewVersion="${{ steps.versions.outputs.snapshot_version }}" -DgenerateBackupPoms=false
+          mvn -B -ntp -DskipTests install
+
+      - name: Generate iOS source project from sample app
+        working-directory: fingerprint-scanner-test
+        shell: bash
+        run: |
+          set -euo pipefail
+          chmod +x mvnw
+          ./mvnw -B -ntp package \
+            -DskipTests \
+            -Dopen=false \
+            -Dcodename1.platform=ios \
+            -Dcodename1.buildTarget=ios-source \
+            -Dfingerprint.scanner.version="${{ steps.versions.outputs.snapshot_version }}"
+
+      - name: Build generated Xcode workspace
+        working-directory: fingerprint-scanner-test/ios/target/myappname-ios-1.0-SNAPSHOT-ios-source
+        shell: bash
+        run: |
+          set -euo pipefail
+          xcodebuild \
+            -workspace MyAppName.xcworkspace \
+            -scheme MyAppName \
+            -configuration Debug \
+            -sdk iphonesimulator \
+            -destination "generic/platform=iOS Simulator" \
+            CODE_SIGNING_ALLOWED=NO \
+            build

fingerprint-scanner-test/.gitignore

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+**/target/
+.idea/
+*.iml
+.DS_Store
+Thumbs.db

fingerprint-scanner-test/.mvn/wrapper/MavenWrapperDownloader.java

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+/*
+ * Copyright 2007-present the original author or 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.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

fingerprint-scanner-test/.mvn/wrapper/maven-wrapper.properties

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+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

fingerprint-scanner-test/README.md

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+# Codename One Project
+
+This is a multi-module Maven project for a Codename One app.
+You can write the app in Java and/or Kotlin, and build for Android, iOS, desktop, and web.
+
+## Getting Started
+
+You selected a Java template. Start here:
+https://shannah.github.io/cn1-maven-archetypes/cn1app-archetype-tutorial/getting-started.html
+
+## IntelliJ Users
+
+This project should work in IntelliJ out of the box.
+You usually don't need to copy or tweak any project files.
+
+## Help and Support
+
+- Codename One website: https://www.codenameone.com
+- Codename One GitHub: https://github.com/codenameone/CodenameOne