JsonInstrumentedTest.kt

package jp.juggler.myapplication

import org.json.JSONArray
import org.json.JSONObject
import org.junit.Assert.assertEquals
import org.junit.Test

class JsonInstrumentedTest {

    @Test
    fun test1() {
        val expected = """[{"mute":"on"}]"""

        // A
        run {
            assertEquals(expected, JSONArray(expected).toString())
        }

        // B
        run {
            // .apply{} で組み立てる
            val json = JSONArray().apply {
                put(JSONObject().apply {
                    put("mute", "on")
                })
            }
            assertEquals(expected, json.toString())
        }

        // C
        run {
            // 気の利いたコンストラクタがなければ作る
            fun jsonObject(vararg pairs: Pair<String, Any?>) =
                JSONObject().apply {
                    pairs.forEach { putOpt(it.first, it.second) }
                }

            fun jsonArray(vararg elements: Any?) =
                JSONArray().apply {
                    elements.forEach { put(it) }
                }

            val json = jsonArray(jsonObject("mute" to "on"))
            assertEquals(expected, json.toString())
        }
    }
}