test: added unit tests

Author: rahilsh

pom.xml

@@ -57,16 +57,11 @@
       <version>3.0.0</version>
     </dependency>
 
+    <!-- Imported directly in Main/K8sScript; declared explicitly (also pulled in via retrofit) -->
     <dependency>
-      <groupId>com.google.guava</groupId>
-      <artifactId>guava</artifactId>
-      <version>33.6.0-jre</version>
-    </dependency>
-
-    <dependency>
-      <artifactId>commons-lang3</artifactId>
-      <groupId>org.apache.commons</groupId>
-      <version>3.20.0</version>
+      <groupId>com.squareup.okhttp3</groupId>
+      <artifactId>okhttp</artifactId>
+      <version>4.12.0</version>
     </dependency>
 
     <dependency>
@@ -75,6 +70,13 @@
         <version>2.15.1</version>
         <scope>compile</scope>
     </dependency>
+
+    <!-- Required at runtime by commons-configuration2 (declared optional upstream) -->
+    <dependency>
+        <groupId>commons-beanutils</groupId>
+        <artifactId>commons-beanutils</artifactId>
+        <version>1.11.0</version>
+    </dependency>
 
     <dependency>
       <artifactId>junit-jupiter</artifactId>
@@ -88,10 +90,5 @@
       <artifactId>client-java</artifactId>
       <version>27.0.0</version>
     </dependency>
-    <dependency>
-      <groupId>com.google.code.gson</groupId>
-      <artifactId>gson</artifactId>
-      <version>2.14.0</version>
-    </dependency>
   </dependencies>
 </project>

src/test/java/in/rsh/scripts/MainTest.java

@@ -0,0 +1,24 @@
+package in.rsh.scripts;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertSame;
+
+import com.google.inject.Injector;
+import org.junit.jupiter.api.Test;
+
+class MainTest {
+
+  @Test
+  void injectorIsCreated() {
+    Injector injector = Main.getInjector();
+    assertNotNull(injector, "Guice injector should be created");
+  }
+
+  @Test
+  void injectorIsSingleton() {
+    assertSame(
+        Main.getInjector(),
+        Main.getInjector(),
+        "getInjector() should return the same cached instance");
+  }
+}