Add StatusResultMatchers.isEqualTo Kotlin extension

Issue: SPR-16429

spring-test/src/test/kotlin/org/springframework/test/web/servlet/result/StatusResultMatchersExtensionsTests.kt

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2002-2018 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.web.servlet.result
+
+import com.nhaarman.mockito_kotlin.mock
+import com.nhaarman.mockito_kotlin.times
+import com.nhaarman.mockito_kotlin.verify
+import org.hamcrest.Matcher
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.Answers
+import org.mockito.Mock
+import org.mockito.junit.MockitoJUnitRunner
+
+@RunWith(MockitoJUnitRunner::class)
+class StatusResultMatchersExtensionsTests {
+
+	@Mock(answer = Answers.RETURNS_MOCKS)
+	lateinit var matchers: StatusResultMatchers
+
+	@Test
+	fun `StatusResultMatchers#is with Matcher parameter is called as expected when using isEqualTo extension`() {
+		val matcher = mock<Matcher<Int>>()
+		matchers.isEqualTo(matcher)
+		verify(matchers, times(1)).`is`(matcher)
+	}
+
+	@Test
+	fun `StatusResultMatchers#is with int parameter is called as expected when using isEqualTo extension`() {
+		matchers.isEqualTo(200)
+		verify(matchers, times(1)).`is`(200)
+	}
+
+}