add multipart method

src/main/kotlin/daikon/core/Part.kt

@@ -0,0 +1,23 @@
+package daikon.core
+
+data class Part(val name: String, val type: String?, val content: ByteArray) {
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as Part
+
+        if (name != other.name) return false
+        if (type != other.type) return false
+        if (!content.contentEquals(other.content)) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = name.hashCode()
+        result = 31 * result + (type?.hashCode() ?: 0)
+        result = 31 * result + content.contentHashCode()
+        return result
+    }
+}

src/main/kotlin/daikon/core/Request.kt

@@ -6,11 +6,13 @@ interface Request {
     fun header(name: String): String
     fun hasHeader(name: String): Boolean
     fun body(): String
+    fun multipart(name: String): Part
     fun url(): String
     fun path(): String
     fun <T> attribute(key: String, value: T)
     fun <T> attribute(key: String) : T
     fun hasAttribute(key: String) : Boolean
     fun method(): Method
     fun withPathParams(value: String): Request
-}
+}
+

src/test/kotlin/daikon/core/PartTest.kt

@@ -0,0 +1,22 @@
+package daikon.core
+
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+
+class PartTest {
+    @Test
+    fun `same parts are equal`() {
+        val part1 = Part("name", null, byteArrayOf(112, 124, 111, 54))
+        val part2 = Part("name", null, byteArrayOf(112, 124, 111, 54))
+
+        assertThat(part1).isEqualTo(part2)
+    }
+
+    @Test
+    fun `parts with different bytearray are different`() {
+        val part1 = Part("name", null, byteArrayOf(112, 124, 111, 54))
+        val part2 = Part("name", null, byteArrayOf(112, 124, 111, 0))
+
+        assertThat(part1).isNotEqualTo(part2)
+    }
+}

src/test/kotlin/daikon/core/TestRequest.kt

@@ -24,6 +24,10 @@ class TestRequest(
         TODO("Not yet implemented")
     }
 
+    override fun multipart(name: String): Part {
+        TODO("Not yet implemented")
+    }
+
     override fun url(): String {
         TODO("Not yet implemented")
     }