diff --git a/.changeset/popular-comics-scream.md b/.changeset/popular-comics-scream.md
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+++ b/.changeset/popular-comics-scream.md
@@ -0,0 +1,2 @@
+---
+---
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diff --git a/packages/abi-coder/src/coders/array.test.ts b/packages/abi-coder/src/coders/array.test.ts
new file mode 100644
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+++ b/packages/abi-coder/src/coders/array.test.ts
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+import { U8_MAX } from '../../test/utils/constants';
+
+import ArrayCoder from './array';
+import BooleanCoder from './boolean';
+import EnumCoder from './enum';
+import NumberCoder from './number';
+
+describe('ArrayCoder', () => {
+  it('should encode a number array with zero inputs', () => {
+    const coder = new ArrayCoder(new NumberCoder('u8'), 0);
+    const expected = new Uint8Array([]);
+    const actual = coder.encode([]);
+
+    expect(actual).toStrictEqual(expected);
+  });
+
+  it('should decode a number array with zero inputs', () => {
+    const coder = new ArrayCoder(new NumberCoder('u8'), 0);
+    const expectedValue: number[] = [];
+    const expectedLength = 0;
+    const [actualValue, actualLength] = coder.decode(new Uint8Array([]), 0);
+
+    expect(actualValue).toStrictEqual(expectedValue);
+    expect(actualLength).toBe(expectedLength);
+  });
+
+  it('should encode a number array with four inputs', () => {
+    const coder = new ArrayCoder(new NumberCoder('u8'), 4);
+    const expected = new Uint8Array([
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13, 0, 0, 0, 0, 0, 0, 0, 37, 0, 0, 0, 0, 0, 0, 0,
+      255,
+    ]);
+    const actual = coder.encode([0, 13, 37, U8_MAX]);
+
+    expect(actual).toStrictEqual(expected);
+  });
+
+  it('should decode a number array with four inputs', () => {
+    const coder = new ArrayCoder(new NumberCoder('u8'), 4);
+    const expectedValue = [0, 13, 37, U8_MAX];
+    const expectedLength = 32;
+    const [actualValue, actualLength] = coder.decode(
+      new Uint8Array([
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13, 0, 0, 0, 0, 0, 0, 0, 37, 0, 0, 0, 0, 0, 0,
+        0, 255,
+      ]),
+      0
+    );
+
+    expect(actualValue).toStrictEqual(expectedValue);
+    expect(actualLength).toBe(expectedLength);
+  });
+
+  it('should encode an enum array with differently typed inputs', () => {
+    const coder = new ArrayCoder(
+      new EnumCoder('TestEnum', { a: new NumberCoder('u8'), b: new BooleanCoder() }),
+      4
+    );
+    const expected = new Uint8Array([
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
+      0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+      0, 255,
+    ]);
+    const actual = coder.encode([{ a: 0 }, { b: false }, { b: true }, { a: U8_MAX }]);
+
+    expect(actual).toStrictEqual(expected);
+  });
+
+  it('should decode an enum array with differently typed inputs', () => {
+    const coder = new ArrayCoder(
+      new EnumCoder('TestEnum', { a: new NumberCoder('u8'), b: new BooleanCoder() }),
+      4
+    );
+    const expectedValue = [{ a: 0 }, { b: false }, { b: true }, { a: U8_MAX }];
+    const expectedLength = 64;
+    const [actualValue, actualLength] = coder.decode(
+      new Uint8Array([
+        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
+        0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        0, 255,
+      ]),
+      0
+    );
+
+    expect(actualValue).toStrictEqual(expectedValue);
+    expect(actualLength).toBe(expectedLength);
+  });
+
+  it('should throw when value to encode is not array', () => {
+    const coder = new ArrayCoder(new NumberCoder('u8'), 1);
+    const nonArrayInput = { ...[1] };
+    expect(() => {
+      coder.encode(nonArrayInput);
+    }).toThrow('expected array value');
+  });
+
+  it('should throw when coder length is not match inputted array length', () => {
+    const coder = new ArrayCoder(new NumberCoder('u8'), 1);
+    expect(() => {
+      coder.encode([1, 2]);
+    }).toThrow('Types/values length mismatch');
+  });
+});