Add missing MockMvc.head Kotlin extension

See gh-1951

spring-test/src/main/kotlin/org/springframework/test/web/servlet/MockHttpServletRequestDsl.kt

@@ -35,6 +35,7 @@ import javax.servlet.http.Cookie
  * @see MockMvc.patch
  * @see MockMvc.delete
  * @see MockMvc.options
+ * @see MockMvc.head
  * @see MockMvc.request
  * @author Sebastien Deleuze
  * @since 5.2

spring-test/src/main/kotlin/org/springframework/test/web/servlet/MockMvcExtensions.kt

@@ -164,6 +164,30 @@ fun MockMvc.options(uri: URI, dsl: MockHttpServletRequestDsl.() -> Unit = {}): R
 	return MockHttpServletRequestDsl(requestBuilder).apply(dsl).perform(this)
 }
 
+/**
+ * [MockMvc] extension providing access to [MockHttpServletRequestDsl] Kotlin DSL.
+ *
+ * @see MockMvcRequestBuilders.head
+ * @author Sebastien Deleuze
+ * @since 5.2
+ */
+fun MockMvc.head(urlTemplate: String, vararg vars: Any?, dsl: MockHttpServletRequestDsl.() -> Unit = {}): ResultActionsDsl {
+	val requestBuilder = MockMvcRequestBuilders.head(urlTemplate, *vars)
+	return MockHttpServletRequestDsl(requestBuilder).apply(dsl).perform(this)
+}
+
+/**
+ * [MockMvc] extension providing access to [MockHttpServletRequestDsl] Kotlin DSL.
+ *
+ * @see MockMvcRequestBuilders.head
+ * @author Sebastien Deleuze
+ * @since 5.2
+ */
+fun MockMvc.head(uri: URI, dsl: MockHttpServletRequestDsl.() -> Unit = {}): ResultActionsDsl {
+	val requestBuilder = MockMvcRequestBuilders.head(uri)
+	return MockHttpServletRequestDsl(requestBuilder).apply(dsl).perform(this)
+}
+
 /**
  * [MockMvc] extension providing access to [MockHttpServletRequestDsl] Kotlin DSL.
  *