setIfAbsent周りのテストを追加

Author: k163377

src/test/kotlin/com/mapk/fastkfunction/argumentBucket/ArgumentBucketTest.kt

@@ -2,8 +2,7 @@ package com.mapk.fastkfunction.argumentBucket
 
 import com.mapk.fastkfunction.argumentbucket.ArgumentBucket
 import com.mapk.fastkfunction.argumentbucket.BucketGenerator
-import org.junit.jupiter.api.Assertions.assertEquals
-import org.junit.jupiter.api.Assertions.assertNull
+import org.junit.jupiter.api.Assertions.*
 import org.junit.jupiter.api.Nested
 import org.junit.jupiter.api.Test
 
@@ -37,4 +36,47 @@ private class ArgumentBucketTest {
             assertEquals(secondValue, bucket[index])
         }
     }
+
+    @Nested
+    inner class SetIfAbsentTest {
+        val index = 1
+        val firstValue = 10
+        val secondValue = 20
+
+        @Nested
+        inner class ByKParameter {
+            val param = parameters[index]
+
+            @Test
+            fun isNull() {
+                assertNull(bucket.setIfAbsent(param, null))
+                assertTrue(bucket.containsKey(param))
+            }
+
+            @Test
+            fun byKParameter() {
+                assertNull(bucket.setIfAbsent(param, firstValue))
+                assertEquals(firstValue, bucket[param])
+                assertEquals(firstValue, bucket.setIfAbsent(param, secondValue))
+                assertEquals(firstValue, bucket[param])
+            }
+        }
+
+        @Nested
+        inner class ByIndex {
+            @Test
+            fun isNull() {
+                assertNull(bucket.setIfAbsent(index, null))
+                assertTrue(bucket.containsKey(parameters[index]))
+            }
+
+            @Test
+            fun byKParameter() {
+                assertNull(bucket.setIfAbsent(index, firstValue))
+                assertEquals(firstValue, bucket[index])
+                assertEquals(firstValue, bucket.setIfAbsent(index, secondValue))
+                assertEquals(firstValue, bucket[index])
+            }
+        }
+    }
 }