update test case for #269 to cover another case from the issue report.

Author: apatrida

src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github269.kt

@@ -1,5 +1,7 @@
 package com.fasterxml.jackson.module.kotlin.test.github
 
+import com.fasterxml.jackson.databind.annotation.JsonSerialize
+import com.fasterxml.jackson.databind.ser.std.ToStringSerializer
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.fasterxml.jackson.module.kotlin.readValue
 import org.junit.Test
@@ -9,6 +11,13 @@ class TestGithub269 {
     data class Foo(val pattern: Regex)
     data class Bar(val thing: Regex)
 
+    data class Goo(
+            @JsonSerialize(using = ToStringSerializer::class)
+            val myPattern: Regex
+    ) {
+        constructor(strPattern: String) : this(Regex(strPattern))
+    }
+
     @Test
     fun testGithub269WithFoo() {
         val mapper = jacksonObjectMapper()
@@ -36,4 +45,15 @@ class TestGithub269 {
 
         mapper.readValue<Bar>("""{"thing":"test"}""")
     }
+
+    @Test
+    fun testGithub269WithGoo() {
+        val mapper = jacksonObjectMapper()
+
+        val testObject = Goo(Regex("test_pattern_1"))
+        val testJson = mapper.writeValueAsString(testObject)
+        val resultObject = mapper.readValue<Goo>(testJson)
+
+        assertEquals(testObject.myPattern.pattern, resultObject.myPattern.pattern)
+    }
 }