diff --git a/core/test/processing/data/FloatListTest.java b/core/test/processing/data/FloatListTest.java
new file mode 100644
index 0000000000..c9b171f806
--- /dev/null
+++ b/core/test/processing/data/FloatListTest.java
@@ -0,0 +1,95 @@
+package processing.data;
+
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.Assert.*;
+
+/**
+ * Unit tests for {@link FloatList}, mirroring coverage patterns used in {@link IntListTest}.
+ */
+public class FloatListTest {
+
+  @Test
+  public void testDefaultConstructor() {
+    FloatList list = new FloatList();
+    assertEquals(0, list.size());
+    assertEquals(10, list.data.length);
+  }
+
+  @Test
+  public void testConstructorWithLength() {
+    FloatList list = new FloatList(25);
+    assertEquals(0, list.size());
+    assertEquals(25, list.data.length);
+  }
+
+  @Test
+  public void testConstructorWithArray() {
+    float[] source = {1.5f, 2.5f, -3f};
+    FloatList list = new FloatList(source);
+    assertEquals(3, list.size());
+    assertEquals(1.5f, list.get(0), 0.0001f);
+    assertEquals(2.5f, list.get(1), 0.0001f);
+    assertEquals(-3f, list.get(2), 0.0001f);
+  }
+
+  @Test
+  public void testConstructorWithIterableParsesNumbersAndNullAsNaN() {
+    List<Object> source = new ArrayList<>(Arrays.asList(1, 2.5f, null, "3.25"));
+    FloatList list = new FloatList(source);
+    assertEquals(4, list.size());
+    assertEquals(1f, list.get(0), 0.0001f);
+    assertEquals(2.5f, list.get(1), 0.0001f);
+    assertTrue(Float.isNaN(list.get(2)));
+    assertEquals(3.25f, list.get(3), 0.0001f);
+  }
+
+  @Test
+  public void testAppendAndGet() {
+    FloatList list = new FloatList();
+    list.append(10f);
+    list.append(20f);
+    assertEquals(2, list.size());
+    assertEquals(10f, list.get(0), 0.0001f);
+    assertEquals(20f, list.get(1), 0.0001f);
+  }
+
+  @Test
+  public void testClear() {
+    FloatList list = new FloatList(new float[] {1f, 2f});
+    list.clear();
+    assertEquals(0, list.size());
+  }
+
+  @Test
+  public void testPopReturnsLastAndRemoves() {
+    FloatList list = new FloatList(new float[] {1f, 2f, 3f});
+    assertEquals(3f, list.pop(), 0.0001f);
+    assertEquals(2, list.size());
+    assertEquals(2f, list.get(1), 0.0001f);
+  }
+
+  @Test(expected = RuntimeException.class)
+  public void testPopOnEmptyThrows() {
+    new FloatList().pop();
+  }
+
+  @Test
+  public void testValuesReturnsCopyOfUsedRange() {
+    FloatList list = new FloatList(new float[] {1f, 2f, 3f});
+    float[] v = list.values();
+    assertEquals(3, v.length);
+    assertArrayEquals(new float[] {1f, 2f, 3f}, v, 0.0001f);
+    v[0] = 99f;
+    assertEquals(1f, list.get(0), 0.0001f);
+  }
+
+  @Test(expected = ArrayIndexOutOfBoundsException.class)
+  public void testGetOutOfBoundsThrows() {
+    new FloatList(new float[] {1f}).get(1);
+  }
+}