1 files changed, 56 insertions, 0 deletions
diff --git a/formats/json-tests/jvmTest/src/kotlinx/serialization/json/GsonCompatibilityTest.kt b/formats/json-tests/jvmTest/src/kotlinx/serialization/json/GsonCompatibilityTest.kt
new file mode 100644
index 00000000..99bc23f9
--- /dev/null
+++ b/formats/json-tests/jvmTest/src/kotlinx/serialization/json/GsonCompatibilityTest.kt
@@ -0,0 +1,56 @@
+package kotlinx.serialization.json
+
+import com.google.gson.*
+import kotlinx.serialization.*
+import org.junit.Test
+import kotlin.test.*
+
+class GsonCompatibilityTest {
+
+    @Serializable
+    data class Box(val d: Double, val f: Float)
+
+    @Test
+    fun testNaN() {
+        checkCompatibility(Box(Double.NaN, 1.0f))
+        checkCompatibility(Box(1.0, Float.NaN))
+        checkCompatibility(Box(Double.NaN, Float.NaN))
+    }
+
+    @Test
+    fun testInfinity() {
+        checkCompatibility(Box(Double.POSITIVE_INFINITY, 1.0f))
+        checkCompatibility(Box(1.0, Float.POSITIVE_INFINITY))
+        checkCompatibility(Box(Double.NEGATIVE_INFINITY, Float.NEGATIVE_INFINITY))
+    }
+
+    @Test
+    fun testNumber() {
+        checkCompatibility(Box(23.9, 23.9f))
+    }
+
+    private fun checkCompatibility(box: Box) {
+        checkCompatibility(box, Gson(), Json)
+        checkCompatibility(box, GsonBuilder().serializeSpecialFloatingPointValues().create(), Json { allowSpecialFloatingPointValues = true })
+    }
+
+    private fun checkCompatibility(box: Box, gson: Gson, json: Json) {
+        val jsonResult = resultOrNull { json.encodeToString(box) }
+        val gsonResult = resultOrNull { gson.toJson(box) }
+        assertEquals(gsonResult, jsonResult)
+
+        if (jsonResult != null && gsonResult != null) {
+            val jsonDeserialized: Box = json.decodeFromString(jsonResult)
+            val gsonDeserialized: Box = gson.fromJson(gsonResult, Box::class.java)
+            assertEquals(gsonDeserialized, jsonDeserialized)
+        }
+    }
+
+    private fun resultOrNull(function: () -> String): String? {
+        return try {
+            function()
+        } catch (t: Throwable) {
+            null
+        }
+    }
+}