Migrate BlobCollector to Kotlin (#49148)

Summary:
Migrate com.facebook.react.modules.blob.BlobCollector to Kotlin

## Changelog:

[INTERNAL] - Migrate com.facebook.react.modules.blob.BlobCollector to Kotlin

Pull Request resolved: https://github.com/facebook/react-native/pull/49148

Test Plan:
```bash
yarn test-android
yarn android
```

Reviewed By: cortinico, fabriziocucci

Differential Revision: D69522998

Pulled By: javache

fbshipit-source-id: a0255d1cdb51ee1f8aa73a07419e228871e56538

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/blob/BlobCollector.java

@@ -1,34 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-package com.facebook.react.modules.blob;
-
-import com.facebook.react.bridge.JavaScriptContextHolder;
-import com.facebook.react.bridge.ReactContext;
-import com.facebook.soloader.SoLoader;
-
-/* package */ class BlobCollector {
-  static {
-    SoLoader.loadLibrary("reactnativeblob");
-  }
-
-  static void install(final ReactContext reactContext, final BlobModule blobModule) {
-    reactContext.runOnJSQueueThread(
-        new Runnable() {
-          @Override
-          public void run() {
-            JavaScriptContextHolder jsContext = reactContext.getJavaScriptContextHolder();
-            // When debugging in chrome the JS context is not available.
-            if (jsContext != null && jsContext.get() != 0) {
-              nativeInstall(blobModule, jsContext.get());
-            }
-          }
-        });
-  }
-
-  private static native void nativeInstall(Object blobModule, long jsContext);
-}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/blob/BlobCollector.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.modules.blob
+
+import com.facebook.react.bridge.JavaScriptContextHolder
+import com.facebook.react.bridge.ReactContext
+import com.facebook.soloader.SoLoader
+
+internal object BlobCollector {
+  init {
+    SoLoader.loadLibrary("reactnativeblob")
+  }
+
+  @JvmStatic
+  public fun install(reactContext: ReactContext, blobModule: BlobModule) {
+    reactContext.runOnJSQueueThread {
+      val jsContext: JavaScriptContextHolder? = reactContext.getJavaScriptContextHolder()
+      // When debugging in chrome the JS context is not available.
+      if (jsContext != null && jsContext.get() != 0L) {
+        nativeInstall(blobModule, jsContext.get())
+      }
+    }
+  }
+
+  private external fun nativeInstall(blobModule: Any, jsContext: Long)
+}

packages/react-native/ReactAndroid/src/test/java/com/facebook/react/modules/blob/BlobCollectorTest.kt

@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.modules.blob
+
+import com.facebook.react.bridge.JavaScriptContextHolder
+import com.facebook.react.bridge.ReactContext
+import com.facebook.soloader.SoLoader
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import org.mockito.MockedStatic
+import org.mockito.Mockito.mockStatic
+import org.mockito.kotlin.any
+import org.mockito.kotlin.mock
+import org.mockito.kotlin.verify
+import org.mockito.kotlin.whenever
+
+class BlobCollectorTest {
+  private lateinit var reactContext: ReactContext
+  private lateinit var mockedStaticSoLoader: MockedStatic<SoLoader>
+
+  @Before
+  fun setUp() {
+    reactContext = mock()
+
+    mockedStaticSoLoader = mockStatic(SoLoader::class.java)
+    mockedStaticSoLoader
+        .`when`<Boolean> { SoLoader.loadLibrary("reactnativeblob") }
+        .thenReturn(true)
+  }
+
+  @After
+  fun tearDown() {
+    mockedStaticSoLoader.close()
+  }
+
+  @Test
+  fun testInstallWithValidJsContext() {
+    val jsContextHolder = mock<JavaScriptContextHolder>()
+    val jsContext = 1234L
+
+    whenever(reactContext.getJavaScriptContextHolder()).thenReturn(jsContextHolder)
+    whenever(jsContextHolder.get()).thenReturn(jsContext)
+
+    BlobCollector.install(reactContext, mock())
+
+    verify(reactContext).runOnJSQueueThread(any())
+  }
+
+  @Test
+  fun testInstallWithInvalidOrNullJsContext() {
+    val jsContextHolder = mock<JavaScriptContextHolder>()
+
+    whenever(reactContext.getJavaScriptContextHolder()).thenReturn(jsContextHolder)
+    whenever(jsContextHolder.get()).thenReturn(0L)
+
+    BlobCollector.install(reactContext, mock())
+
+    verify(reactContext).runOnJSQueueThread(any())
+  }
+}