diff --git a/__tests__/Action.test.ts b/__tests__/Action.test.ts
index f3a3f4f..3822436 100644
--- a/__tests__/Action.test.ts
+++ b/__tests__/Action.test.ts
@@ -2,35 +2,113 @@ import { Action } from "../src/Action";
 import { Inputs } from "../src/Inputs";
 import { Releases } from "../src/Releases";
 
+const createMock = jest.fn()
+const uploadMock = jest.fn()
+
+const artifactPath = 'a/path'
+const body = 'body'
+const commit = 'commit'
+const contentType = "raw"
+const contentLength = 100
+const draft = true
+const name = 'name'
+const tag = 'tag'
+const token = 'token'
+const url = 'http://api.example.com'
 
 describe("Action", () => {
-
-    it('verifies my sanity', () => {
-        
+    beforeEach(() => {
+        createMock.mockClear()
+        uploadMock.mockClear()
     })
-})
 
-function createAction(): Action {
-    const MockReleases = jest.fn<Releases, any>(() => {
-        return {
-            create: jest.fn(),
-            uploadArtifact: jest.fn()
+    it('creates release but does not upload if no artifact', async () => {
+        const action = createAction(false)
+
+        await action.perform()
+
+        expect(createMock).toBeCalledWith(tag, body, commit, draft, name)
+        expect(uploadMock).not.toBeCalled()
+    })
+
+    it('creates release then uploads artifact', async () => {
+        const action = createAction(true)
+        createMock.mockResolvedValue({
+            data: {
+                assets_url: url
+            }
+        })
+
+        await action.perform()
+
+        expect(createMock).toBeCalledWith(tag, body, commit, draft, name)
+        expect(uploadMock).toBeCalledWith(url, contentLength, contentType, artifactPath, 'path')
+    })
+
+    it('throws error when create fails', async () => {
+        const action = createAction(true)
+        createMock.mockRejectedValue("error")
+
+        expect.hasAssertions()
+        try {
+            await action.perform()
+        } catch (error) {
+            expect(error).toEqual("error")
         }
-    })
-    const MockInputs = jest.fn<Inputs, any>(() => {
-        return {
-            artifact: "foo",
-            artifactContentType: "foo",
-            artifactContentLength: 22,
-            body: "bar",
-            commit: "foo",
-            name: "name",
-            tag: "foo",
-            token: "foo"
-        }
-    })
-    const inputs = new MockInputs()
-    const releases = new MockReleases()
 
-    return new Action(inputs, releases)
-}
\ No newline at end of file
+        expect(createMock).toBeCalledWith(tag, body, commit, draft, name)
+        expect(uploadMock).not.toBeCalled()
+    })
+
+    it('throws error when upload fails', async () => {
+        const action = createAction(true)
+        createMock.mockResolvedValue({
+            data: {
+                assets_url: url
+            }
+        })
+        uploadMock.mockRejectedValue("error")
+
+        expect.hasAssertions()
+        try {
+            await action.perform()
+        } catch (error) {
+            expect(error).toEqual("error")
+        }
+
+        expect(createMock).toBeCalledWith(tag, body, commit, draft, name)
+        expect(uploadMock).toBeCalledWith(url, contentLength, contentType, artifactPath, 'path')
+    })
+
+    function createAction(hasArtifact: boolean): Action {
+        let artifact: string
+        if (hasArtifact) {
+            artifact = artifactPath
+        } else {
+            artifact = ''
+        }
+        const MockReleases = jest.fn<Releases, any>(() => {
+            return {
+                create: createMock,
+                uploadArtifact: uploadMock
+            }
+        })
+        const MockInputs = jest.fn<Inputs, any>(() => {
+            return {
+                artifact: artifact,
+                artifactContentType: contentType,
+                artifactContentLength: contentLength,
+                body: body,
+                commit: commit,
+                draft: draft,
+                name: name,
+                tag: tag,
+                token: token
+            }
+        })
+        const inputs = new MockInputs()
+        const releases = new MockReleases()
+
+        return new Action(inputs, releases)
+    }
+})
\ No newline at end of file
diff --git a/src/Action.ts b/src/Action.ts
index 8fa47de..f3d18ef 100644
--- a/src/Action.ts
+++ b/src/Action.ts
@@ -17,7 +17,8 @@ export class Action {
             this.inputs.body,
             this.inputs.commit,
             this.inputs.draft,
-            this.inputs.name)
+            this.inputs.name
+        )
 
         if (this.inputs.artifact) {
             await this.releases.uploadArtifact(
@@ -25,7 +26,8 @@ export class Action {
                 this.inputs.artifactContentLength,
                 this.inputs.artifactContentType,
                 this.inputs.artifact,
-                basename(this.inputs.artifact))
+                basename(this.inputs.artifact)
+            )
         }
     }
 }
\ No newline at end of file