Fix #431: Properties named "list" result in empty names of classes

Author: ark-1

src/main/kotlin/wu/seal/jsontokotlin/utils/TypeHelper.kt

@@ -111,6 +111,12 @@ fun isExpectedJsonObjArrayType(jsonElementArray: JsonArray): Boolean {
     return jsonElementArray.firstOrNull()?.isJsonObject ?: false
 }
 
+internal val random = Random(0)
+
+fun resetJsonToKotlinRandom() {
+    random.setSeed(0)
+}
+
 /**
  * when get the child type in an array
  * ,we need to make the property name be legal and then modify the property name to make it's type name looks like a child type.
@@ -128,14 +134,16 @@ fun adjustPropertyNameForGettingArrayChildType(property: String): String {
             val firstLatterAfterListIndex = innerProperty.lastIndexOf("List") + 4
             if (innerProperty.length > firstLatterAfterListIndex && innerProperty[firstLatterAfterListIndex] in 'A'..'Z') {
                 innerProperty = innerProperty.replaceFirst("List", "", false)
+            } else if (innerProperty == "List") {
+                innerProperty = "Item${random.nextInt(10)}"
             } else if (innerProperty.length == firstLatterAfterListIndex) {
                 innerProperty = innerProperty.substring(0, innerProperty.lastIndexOf("List"))
             }
         }
 
         innerProperty.contains("list") -> {
             if (innerProperty == "list") {
-                innerProperty = "Item${Date().time.toString().last()}"
+                innerProperty = "Item${random.nextInt()}"
             } else if (innerProperty.indexOf("list") == 0 && innerProperty.length >= 5) {
                 val end = innerProperty.substring(5)
                 val pre = (innerProperty[4] + "").toLowerCase()

src/test/kotlin/wu/seal/jsontokotlin/regression/Issue431Test.kt

@@ -0,0 +1,32 @@
+package wu.seal.jsontokotlin.regression
+
+import com.winterbe.expekt.should
+import org.junit.Test
+import wu.seal.jsontokotlin.generateKotlinClassCode
+import wu.seal.jsontokotlin.model.DefaultValueStrategy
+import wu.seal.jsontokotlin.model.TargetJsonConverter
+import wu.seal.jsontokotlin.test.TestConfig
+import wu.seal.jsontokotlin.utils.BaseTest
+import wu.seal.jsontokotlin.utils.resetJsonToKotlinRandom
+
+class Issue431Test : BaseTest() {
+    @Test
+    fun testIssue431() {
+        TestConfig.apply {
+            isCommentOff = true
+            targetJsonConvertLib = TargetJsonConverter.None
+            defaultValueStrategy = DefaultValueStrategy.None
+            isNestedClassModel = false
+        }
+        val json = """{"list":[{}]}"""
+        val expected = """
+        data class Test(
+            val list: List<Item0>
+        )
+        
+        class Item0
+        """.trimIndent()
+        resetJsonToKotlinRandom()
+        json.generateKotlinClassCode("Test").should.equal(expected)
+    }
+}

src/test/kotlin/wu/seal/jsontokotlin/utils/TypeHelperKtTest.kt

@@ -70,13 +70,18 @@ class TypeHelperKtTest {
 
     @Test
     fun adjustPropertyNameForGettingArrayChildTypeTest() {
-        adjustPropertyNameForGettingArrayChildType("").should.be.equal("X")
-        adjustPropertyNameForGettingArrayChildType("List").should.be.equal("")
-        adjustPropertyNameForGettingArrayChildType("arrayList").should.be.equal("Array")
-        adjustPropertyNameForGettingArrayChildType("Apples").should.be.equal("Apple")
-        adjustPropertyNameForGettingArrayChildType("Activities").should.be.equal("Activity")
-        adjustPropertyNameForGettingArrayChildType("Book_List").should.be.equal("Book")
-        adjustPropertyNameForGettingArrayChildType("show_list").should.be.equal("Show")
+        fun testArrayPropertyName(propertyName: String, expected: String) {
+            resetJsonToKotlinRandom()
+            adjustPropertyNameForGettingArrayChildType(propertyName).should.be.equal(expected)
+        }
+
+        testArrayPropertyName("", "X")
+        testArrayPropertyName("List", "Item0")
+        testArrayPropertyName("arrayList", "Array")
+        testArrayPropertyName("Apples", "Apple")
+        testArrayPropertyName("Activities", "Activity")
+        testArrayPropertyName("Book_List", "Book")
+        testArrayPropertyName("show_list", "Show")
     }
 
     @Test