Add argWhere function

mockito-kotlin/src/main/kotlin/com/nhaarman/mockito_kotlin/Mockito.kt

@@ -68,6 +68,14 @@ inline fun <reified T : Any> argThat(noinline predicate: T.() -> Boolean) = Mock
  */
 inline fun <reified T : Any> argForWhich(noinline predicate: T.() -> Boolean) = argThat(predicate)
 
+/**
+ * Creates a custom argument matcher.
+ * `null` values will never evaluate to `true`.
+ *
+ * @param predicate A function that returns `true` when given [T] matches the predicate.
+ */
+inline fun <reified T: Any> argWhere(noinline predicate: (T) -> Boolean) = argThat(predicate)
+
 /**
  * For usage with verification only.
  *

mockito-kotlin/src/test/kotlin/test/MockitoTest.kt

@@ -128,6 +128,16 @@ class MockitoTest : TestBase() {
         }
     }
 
+    @Test
+    fun listArgWhere() {
+        mock<Methods>().apply {
+            closedList(listOf(Closed(), Closed()))
+            verify(this).closedList(argWhere {
+                it.size == 2
+            })
+        }
+    }
+
     @Test
     fun listArgCheck() {
         mock<Methods>().apply {

tmp.txt

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+263344f Merge pull request #135 from nhaarman/handle-null-in-argumentmatcher
+b77d969 Handle `null` in argument matchers.
+543238f Merge pull request #131 from nhaarman/release-1.0.0
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