Android: unit tests for package install codepaths

android/app/build.gradle

@@ -97,6 +97,7 @@ dependencies {
 
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'org.json:json:20231013'
+    testImplementation 'org.mockito:mockito-core:5.14.2'
 
     androidTestImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.2.1'

android/app/src/main/java/com/microsoft/codepush/react/CodePushUpdateManager.java

@@ -185,6 +185,13 @@ public void downloadPackage(JSONObject updatePackage, String expectedBundleFileN
             }
 
             connection.setRequestProperty("Accept-Encoding", "identity");
+
+            int responseCode = connection.getResponseCode();
+            if (responseCode < 200 || responseCode >= 300) {
+                throw new CodePushUnknownException("Error downloading update package. Response code: "
+                        + responseCode + ". Response body: " + NetworkUtils.readStreamToString(connection.getErrorStream()));
+            }
+
             bin = new BufferedInputStream(connection.getInputStream());
 
             long totalBytes = connection.getContentLength();
@@ -234,6 +241,15 @@ public void downloadPackage(JSONObject updatePackage, String expectedBundleFileN
             }
         }
 
+        installDownloadedUpdate(updatePackage, expectedBundleFileName, stringPublicKey,
+                downloadFile, isZip, newUpdateFolderPath, newUpdateMetadataPath);
+    }
+
+    void installDownloadedUpdate(JSONObject updatePackage, String expectedBundleFileName,
+                                  String stringPublicKey, File downloadFile, boolean isZip,
+                                  String newUpdateFolderPath, String newUpdateMetadataPath) throws IOException {
+        String newUpdateHash = updatePackage.optString(CodePushConstants.PACKAGE_HASH_KEY, null);
+
         if (isZip) {
             // Unzip the downloaded file and then delete the zip
             String unzippedFolderPath = getUnzippedFolderPath();
@@ -301,30 +317,26 @@ public void downloadPackage(JSONObject updatePackage, String expectedBundleFileN
                 String signaturePath = CodePushUpdateUtils.getSignatureFilePath(newUpdateFolderPath);
                 boolean isSignatureAppearedInBundle = FileUtils.fileAtPathExists(signaturePath);
 
+                if (isSignatureVerificationEnabled && !isSignatureAppearedInBundle) {
+                    throw new CodePushInvalidUpdateException(
+                            "Error! Public key was provided but there is no JWT signature within app bundle to verify. " +
+                            "Possible reasons, why that might happen: \n" +
+                            "1. You've been released CodePush bundle update using version of CodePush CLI that is not support code signing.\n" +
+                            "2. You've been released CodePush bundle update without providing --privateKeyPath option."
+                    );
+                }
+
+                if (!isSignatureVerificationEnabled && isSignatureAppearedInBundle) {
+                    CodePushUtils.log(
+                            "Warning! JWT signature exists in codepush update but code integrity check couldn't be performed because there is no public key configured. " +
+                            "Please ensure that public key is properly configured within your application."
+                    );
+                }
+
+                CodePushUpdateUtils.verifyFolderHash(newUpdateFolderPath, newUpdateHash);
+
                 if (isSignatureVerificationEnabled) {
-                    if (isSignatureAppearedInBundle) {
-                        CodePushUpdateUtils.verifyFolderHash(newUpdateFolderPath, newUpdateHash);
-                        CodePushUpdateUtils.verifyUpdateSignature(newUpdateFolderPath, newUpdateHash, stringPublicKey);
-                    } else {
-                        throw new CodePushInvalidUpdateException(
-                                "Error! Public key was provided but there is no JWT signature within app bundle to verify. " +
-                                "Possible reasons, why that might happen: \n" +
-                                "1. You've been released CodePush bundle update using version of CodePush CLI that is not support code signing.\n" +
-                                "2. You've been released CodePush bundle update without providing --privateKeyPath option."
-                        );
-                    }
-                } else {
-                    if (isSignatureAppearedInBundle) {
-                        CodePushUtils.log(
-                                "Warning! JWT signature exists in codepush update but code integrity check couldn't be performed because there is no public key configured. " +
-                                "Please ensure that public key is properly configured within your application."
-                        );
-                        CodePushUpdateUtils.verifyFolderHash(newUpdateFolderPath, newUpdateHash);
-                    } else {
-                        if (isDiffUpdate) {
-                            CodePushUpdateUtils.verifyFolderHash(newUpdateFolderPath, newUpdateHash);
-                        }
-                    }
+                    CodePushUpdateUtils.verifyUpdateSignature(newUpdateFolderPath, newUpdateHash, stringPublicKey);
                 }
 
                 CodePushUtils.setJSONValueForKey(updatePackage, CodePushConstants.RELATIVE_BUNDLE_PATH_KEY, relativeBundlePath);
@@ -384,6 +396,13 @@ public void downloadAndReplaceCurrentBundle(String remoteBundleUrl, String bundl
         try {
             downloadUrl = new URL(remoteBundleUrl);
             connection = (HttpURLConnection) (downloadUrl.openConnection());
+
+            int responseCode = connection.getResponseCode();
+            if (responseCode < 200 || responseCode >= 300) {
+                throw new CodePushUnknownException("Error downloading update package. Response code: "
+                        + responseCode + ". Response body: " + NetworkUtils.readStreamToString(connection.getErrorStream()));
+            }
+
             bin = new BufferedInputStream(connection.getInputStream());
             File downloadFile = new File(getCurrentPackageBundlePath(bundleFileName));
             downloadFile.delete();

android/app/src/main/java/com/microsoft/codepush/react/NetworkUtils.kt

@@ -0,0 +1,9 @@
+@file:JvmName("NetworkUtils")
+
+package com.microsoft.codepush.react
+
+import java.io.InputStream
+
+fun readStreamToString(inputStream: InputStream?): String {
+    return inputStream?.bufferedReader()?.use { it.readText() } ?: ""
+}