tests: replace logging implementation when unit testing EventsBuilder

Fixes "Method d in android.util.Log not mocked"

parsely/src/main/java/com/parsely/parselyandroid/Log.kt

@@ -1,18 +1,32 @@
 package com.parsely.parselyandroid
 
-import android.util.Log
+import android.util.Log as AndroidLog
 
-internal object Log {
+internal object AndroidLogWrapper : Log {
 
-    fun i(message: String) {
-        Log.i("Parsely", message)
+    override fun i(message: String) {
+        AndroidLog.i("Parsely", message)
     }
 
-    fun d(message: String) {
-        Log.d("Parsely", message)
+    override fun d(message: String) {
+        AndroidLog.d("Parsely", message)
     }
 
-    fun e(message: String, throwable: Throwable? = null) {
-        Log.e("Parsely", message, throwable)
+    override fun e(message: String, throwable: Throwable?) {
+        AndroidLog.e("Parsely", message, throwable)
+    }
+}
+
+internal interface Log {
+    fun i(message: String)
+    fun d(message: String)
+    fun e(message: String, throwable: Throwable?)
+
+    companion object {
+        var instance: Log = AndroidLogWrapper
+
+        fun i(message: String) = instance.i(message)
+        fun d(message: String) = instance.d(message)
+        fun e(message: String, throwable: Throwable? = null) = instance.e(message, throwable)
     }
 }

parsely/src/test/java/com/parsely/parselyandroid/EventsBuilderTest.kt

@@ -18,6 +18,7 @@ internal class EventsBuilderTest {
             TEST_SITE_ID,
             clock
         )
+        Log.instance = FakeLog
     }
 
     @Test

parsely/src/test/java/com/parsely/parselyandroid/FakeLog.kt

@@ -0,0 +1,7 @@
+package com.parsely.parselyandroid
+
+internal object FakeLog : Log {
+    override fun i(message: String) = println(message)
+    override fun d(message: String) = println(message)
+    override fun e(message: String, throwable: Throwable?) = println(message + throwable?.message)
+}