1 files changed, 85 insertions, 0 deletions
diff --git a/formats/json-tests/commonTest/src/kotlinx/serialization/ClassWithMultipleMasksTest.kt b/formats/json-tests/commonTest/src/kotlinx/serialization/ClassWithMultipleMasksTest.kt
new file mode 100644
index 00000000..cc0158c1
--- /dev/null
+++ b/formats/json-tests/commonTest/src/kotlinx/serialization/ClassWithMultipleMasksTest.kt
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2017-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package kotlinx.serialization
+
+import kotlinx.serialization.json.Json
+import kotlin.test.*
+
+class ClassWithMultipleMasksTest {
+
+    /*
+     * Plugin generates int mask for each 32 fields.
+     * This test ensures that mask is properly generated when fields count is greater than 32.
+     */
+    @Serializable
+    data class BigDummyData(
+        val regular: String,
+        @SerialName("field0") val field0: String? = null,
+        @SerialName("field1") val field1: String? = null,
+        @SerialName("field2") val field2: String? = null,
+        @SerialName("field3") val field3: String? = null,
+        @SerialName("field4") val field4: String? = null,
+        @SerialName("field5") val field5: String? = null,
+        @SerialName("field6") val field6: String? = null,
+        @SerialName("field7") val field7: String? = null,
+        @SerialName("field8") val field8: String? = null,
+        @SerialName("field9") val field9: String? = null,
+        @SerialName("field10") val field10: String? = null,
+        @SerialName("field11") val field11: String? = null,
+        @SerialName("field12") val field12: String? = null,
+        @SerialName("field13") val field13: String? = null,
+        @SerialName("field14") val field14: String? = null,
+        @SerialName("field15") val field15: String? = null,
+        @SerialName("field16") val field16: String? = null,
+        @SerialName("field17") val field17: String? = null,
+        @SerialName("field18") val field18: String? = null,
+        @SerialName("field19") val field19: String? = null,
+        @SerialName("field20") val field20: String? = null,
+        @SerialName("field21") val field21: String? = null,
+        @SerialName("field22") val field22: String? = null,
+        @SerialName("field23") val field23: String? = null,
+        @SerialName("field24") val field24: String? = null,
+        @SerialName("field25") val field25: String? = null,
+        @SerialName("field26") val field26: String? = null,
+        @SerialName("field27") val field27: String? = null,
+        @SerialName("field28") val field28: String? = null,
+        @SerialName("field29") val field29: String? = null,
+        @SerialName("field30") val field30: String? = null,
+        @SerialName("field31") val field31: String? = null,
+        @SerialName("field32") val field32: String? = null,
+        @SerialName("field33") val field33: String? = null,
+        @SerialName("field34") val field34: String? = null,
+        @SerialName("field35") val field35: String? = null,
+        @SerialName("field36") val field36: String? = null,
+        @SerialName("field37") val field37: String? = null,
+        @SerialName("field38") val field38: String? = null,
+        @SerialName("field39") val field39: String? = null,
+        @SerialName("field40") val field40: String? = "b",
+        @Required val requiredLast: String = "required"
+    )
+
+    @Test
+    fun testMoreThan32Fields() {
+        val data = BigDummyData("a")
+        val message = Json.encodeToString(BigDummyData.serializer(), data)
+        println(message)
+        val restored = Json.decodeFromString(BigDummyData.serializer(), """{"regular": "0","requiredLast":"r"}""")
+        with(restored) {
+            assertEquals("0", regular)
+            assertEquals("b", field40)
+            assertEquals(null, field39)
+            assertEquals("r", requiredLast)
+        }
+
+        val restored2 = Json.decodeFromString(BigDummyData.serializer(), """{"regular": "0", "field39":"f","requiredLast":"required"}""")
+        with(restored2) {
+            assertEquals("0", regular)
+            assertEquals("b", field40)
+            assertEquals("f", field39)
+            assertEquals("required", requiredLast)
+        }
+        assertFailsWith<SerializationException> { Json.decodeFromString(BigDummyData.serializer(), """{"regular": "0"}""") }
+    }
+}