fix: add tests for MainFragment and refactor testing modules

testing/unit/.gitignore

@@ -0,0 +1 @@
+/build

testing/unit/build.gradle.kts

@@ -0,0 +1,37 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+plugins {
+  id("com.android.library")
+  kotlin("android")
+}
+
+android {
+  namespace = "${BuildConfig.packageName}.testing.unit"
+}
+
+dependencies {
+  api(libs.tests.androidx.test.core)
+  api(libs.tests.robolectric)
+  api(libs.tests.junit)
+  api(libs.tests.google.truth)
+  api(libs.tests.mockk)
+
+  api(projects.buildInfo)
+  api(projects.common)
+  api(projects.shared)
+}

testing/unit/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile