diff --git a/test/unit/__snapshots__/metadata.test.ts.snap b/test/unit/__snapshots__/metadata.test.ts.snap
new file mode 100644
index 0000000..ff5282b
--- /dev/null
+++ b/test/unit/__snapshots__/metadata.test.ts.snap
@@ -0,0 +1,17 @@
+// Vitest Snapshot v1
+
+exports[`Metadata Object > get commentID() 1`] = `undefined`;
+
+exports[`Metadata Object > get commentID() 2`] = `undefined`;
+
+exports[`Metadata Object > get commentID() 3`] = `"123456789"`;
+
+exports[`Metadata Object > get commentID() 4`] = `"123456789"`;
+
+exports[`Metadata Object > get tag() 1`] = `undefined`;
+
+exports[`Metadata Object > get tag() 2`] = `"v1"`;
+
+exports[`Metadata Object > get tag() 3`] = `undefined`;
+
+exports[`Metadata Object > get tag() 4`] = `"v1"`;
diff --git a/test/unit/fixtures/metadata.fixture.ts b/test/unit/fixtures/metadata.fixture.ts
index 9cac60a..8201b1e 100644
--- a/test/unit/fixtures/metadata.fixture.ts
+++ b/test/unit/fixtures/metadata.fixture.ts
@@ -6,7 +6,12 @@ export interface IMetadataTestContext {
 }
 
 export const metadataContextFixture: IMetadataTestContext = {
-  metadata: [new Metadata({ tag: undefined, commentID: undefined })],
+  metadata: [
+    new Metadata({ tag: undefined, commentID: undefined }),
+    new Metadata({ tag: 'v1', commentID: undefined }),
+    new Metadata({ tag: undefined, commentID: '123456789' }),
+    new Metadata({ tag: 'v1', commentID: '123456789' }),
+  ],
 
   invalid: [
     // @ts-expect-error: Let's ignore a type error, it's required for testing
@@ -21,5 +26,9 @@ export const metadataContextFixture: IMetadataTestContext = {
     new Metadata({}),
     // @ts-expect-error: Let's ignore a type error, it's required for testing
     new Metadata([]),
+    // @ts-expect-error: Let's ignore a type error, it's required for testing
+    new Metadata({ tag: null, commentID: null }),
+    // @ts-expect-error: Let's ignore a type error, it's required for testing
+    new Metadata({ tag: undefined, commentID: 123456789 }),
   ],
 };
diff --git a/test/unit/metadata.test.ts b/test/unit/metadata.test.ts
index b4cc854..372bd56 100644
--- a/test/unit/metadata.test.ts
+++ b/test/unit/metadata.test.ts
@@ -1,4 +1,4 @@
-import { describe, it, expect, beforeEach } from 'vitest';
+import { describe, it, expect, beforeEach, test } from 'vitest';
 
 import {
   metadataContextFixture,
@@ -11,7 +11,31 @@ describe('Metadata Object', () => {
     context.invalid = metadataContextFixture.invalid;
   });
 
-  it<IMetadataTestContext>('can be instantiated', context => {
-    context.metadata.map(item => expect(item).toBeDefined());
-  });
+  it<IMetadataTestContext>('can be instantiated', context =>
+    context.metadata.map(metadataItem => expect(metadataItem).toBeDefined()));
+
+  it.todo<IMetadataTestContext>(
+    'is invalid' /*, async context => {
+    context.invalid.map(async item =>
+      expect(Metadata.validate(item)).resolves.toMatchSnapshot()
+    );
+  }*/
+  );
+
+  test<IMetadataTestContext>('get tag()', context =>
+    context.metadata.map(metadataItem =>
+      expect(metadataItem.tag).toMatchSnapshot()
+    ));
+
+  test.todo<IMetadataTestContext>('set tag()');
+
+  test<IMetadataTestContext>('get commentID()', context =>
+    context.metadata.map(metadataItem =>
+      expect(metadataItem.commentID).toMatchSnapshot()
+    ));
+
+  test.todo<IMetadataTestContext>('set commentID()');
+
+  test.todo<IMetadataTestContext>('getMetadata()');
+  test.todo<IMetadataTestContext>('setMetadata()');
 });