#2717 converted Matcher.java to Kotlin

app/src/androidTest/java/org/kiwix/kiwixmobile/testutils/Matcher.kt

@@ -0,0 +1,45 @@
+/*
+ * Kiwix Android
+ * Copyright (c) 2019 Kiwix <android.kiwix.org>
+ * This program 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.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package org.kiwix.kiwixmobile.testutils
+
+import android.view.View
+import android.view.ViewGroup
+import org.hamcrest.Description
+import org.hamcrest.Matcher
+import org.hamcrest.TypeSafeMatcher
+
+object Matcher {
+  fun childAtPosition(
+    parentMatcher: Matcher<View?>,
+    position: Int
+  ): Matcher<View> {
+    return object : TypeSafeMatcher<View>() {
+      override fun describeTo(description: Description) {
+        description.appendText("Child at position $position in parent ")
+        parentMatcher.describeTo(description)
+      }
+
+      public override fun matchesSafely(view: View): Boolean {
+        val parent = view.parent
+        return (parent is ViewGroup && parentMatcher.matches(parent) &&
+          view == parent.getChildAt(position))
+      }
+    }
+  }
+}