From 8d00943077ddb4a9e806d250378c752d0dc62b34 Mon Sep 17 00:00:00 2001
From: Tom Costigliola <tcostigl@amazon.com>
Date: Wed, 6 Dec 2023 13:30:00 -0500
Subject: [PATCH] Add Missing Test Cases

---
 .../ionelement/MutableStructFieldsTests.kt    | 105 ++++++++++++++++++
 .../demos/java/MutableStructFieldsDemo.java   |   2 -
 2 files changed, 105 insertions(+), 2 deletions(-)

diff --git a/test/com/amazon/ionelement/MutableStructFieldsTests.kt b/test/com/amazon/ionelement/MutableStructFieldsTests.kt
index b9c6ace..42afb10 100644
--- a/test/com/amazon/ionelement/MutableStructFieldsTests.kt
+++ b/test/com/amazon/ionelement/MutableStructFieldsTests.kt
@@ -216,6 +216,111 @@ class MutableStructFieldsTests {
         assertEquals(expected, updated)
     }
 
+    @Test
+    fun testClear() {
+        val mutableFields = testStruct.mutableFields()
+        mutableFields.clear()
+
+        assertEquals(emptyIonStruct(), ionStructOf(mutableFields))
+        assertTrue(mutableFields.size == 0)
+        assertFalse(mutableFields.iterator().hasNext())
+    }
+
+    @Test
+    fun testClearField() {
+        val mutableFields = testStruct.mutableFields()
+        mutableFields.clearField("author")
+
+        val expected = testStruct.update {
+            removeAll(
+                listOf(
+                    field(
+                        "author",
+                        buildStruct {
+                            add("lastname", ionString("Doe"))
+                            add("firstname", ionString("Jane"))
+                        }
+                    ),
+                    field(
+                        "author",
+                        buildStruct {
+                            add("lastname", ionString("Smith"))
+                            add("firstname", ionString("Jane"))
+                        }
+                    )
+                )
+            )
+        }
+
+        assertEquals(expected, ionStructOf(mutableFields))
+    }
+
+    @Test
+    fun testContains() {
+        val mutableFields = testStruct.mutableFields()
+
+        assertTrue(
+            mutableFields.contains(
+                field(
+                    "author",
+                    buildStruct {
+                        add("lastname", ionString("Doe"))
+                        add("firstname", ionString("Jane"))
+                    }
+                )
+            )
+        )
+
+        assertFalse(mutableFields.contains(field("foo", ionString("bar"))))
+    }
+
+    @Test
+    fun testContainsAll() {
+        val mutableFields = testStruct.mutableFields()
+
+        assertTrue(
+            mutableFields.containsAll(
+                listOf(
+                    field(
+                        "author",
+                        buildStruct {
+                            add("lastname", ionString("Doe"))
+                            add("firstname", ionString("Jane"))
+                        }
+                    ),
+                    field(
+                        "author",
+                        buildStruct {
+                            add("lastname", ionString("Smith"))
+                            add("firstname", ionString("Jane"))
+                        }
+                    )
+                )
+            )
+        )
+
+        assertFalse(
+            mutableFields.containsAll(
+                listOf(
+                    field("foo", ionString("bar")),
+                    field("isbn", ionString("123-456-789"))
+                )
+            )
+        )
+    }
+
+    @Test
+    fun testIsEmpty() {
+        val mutableFields = testStruct.mutableFields()
+
+        assertFalse(mutableFields.isEmpty())
+
+        mutableFields.clear()
+
+        assertTrue(mutableFields.isEmpty())
+        assertTrue(emptyIonStruct().mutableFields().isEmpty())
+    }
+
     @Test
     fun testIterator() {
         val mutableFields = testStruct.mutableFields()
diff --git a/test/com/amazon/ionelement/demos/java/MutableStructFieldsDemo.java b/test/com/amazon/ionelement/demos/java/MutableStructFieldsDemo.java
index 6036982..af96eb1 100644
--- a/test/com/amazon/ionelement/demos/java/MutableStructFieldsDemo.java
+++ b/test/com/amazon/ionelement/demos/java/MutableStructFieldsDemo.java
@@ -3,13 +3,11 @@
 import com.amazon.ionelement.api.Ion;
 import com.amazon.ionelement.api.StructElement;
 import kotlin.Unit;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
 import static com.amazon.ionelement.api.ElementLoader.loadSingleElement;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-@Disabled
 public class MutableStructFieldsDemo {
 
     @Test