Adds back the Fake CI option

README.md

@@ -57,6 +57,7 @@ If you create an [appropriately scoped temporary api token](http://danger.system
 You can manually trigger danger against a pull request on the command line by setting the following environmental variables:
 
 ```bash
+export DANGER_FAKE_CI="YEP"
 export DANGER_GITHUB_API_TOKEN='xxxxxxxxxx'  # a github api token
 export DANGER_TEST_REPO='username/reponame'
 ```

changelog.md

@@ -2,6 +2,10 @@
 
 //  Add your own contribution below
 
+### 0.6.10
+
+* Brings back the ability to emulate a fake CI run locally via `danger` - orta
+
 ### 0.6.9
 
 * Makes `babel-polyfill` a direct dependency, this is because it is actually an implicit dependency in the app. I'm not sure how I feel about this, I guess if we use a part of it in the babel translation of a user's Dangerfile them I'm OK with it. - orta 

source/ci_source/Fake.js

@@ -2,6 +2,7 @@
 "use strict"
 
 import type { Env } from "./ci_source"
+import { ensureEnvKeysExist } from "./ci_source_helpers"
 
 export default class FakeCI {
   env: Env
@@ -15,7 +16,7 @@ export default class FakeCI {
   }
   get name(): string { return "Fake Testing CI" }
 
-  get isCI(): boolean { return true }
+  get isCI(): boolean { return ensureEnvKeysExist(this.env, ["DANGER_FAKE_CI"]) }
   get isPR(): boolean { return true }
 
   get pullRequestID(): string { return this.env.pr }

source/ci_source/_tests/_ci_course.test.js

@@ -0,0 +1,16 @@
+// @flow
+
+import Fake from "../Fake"
+import { getCISourceForEnv } from "../ci_source"
+
+describe(".getCISourceForEnv", () => {
+  test("returns undefined if nothing is found", () => {
+    const ci = getCISourceForEnv({ })
+    expect(ci).toBeUndefined()
+  })
+
+  test("falls back to the fake if DANGER_FAKE_CI exists", () => {
+    const ci = getCISourceForEnv({ DANGER_FAKE_CI: "YES" })
+    expect(ci).toBeInstanceOf(Fake)
+  })
+})

source/ci_source/ci_source.js

@@ -34,6 +34,7 @@ export interface CISource {
 import Travis from "./Travis"
 import Circle from "./Circle"
 import Semaphore from "./Semaphore"
+import Fake from "./Fake"
 
 /**
  * Gets a CI Source form the current environment, by asking all known
@@ -45,13 +46,16 @@ export function getCISourceForEnv(env: Env): ?CISource {
   const travis = new Travis(env)
   const circle = new Circle(env)
   const semaphore = new Semaphore(env)
+  const fake = new Fake(env)
 
   if (travis.isCI) {
     return travis
   } else if (circle.isCI) {
     return circle
-  } if (semaphore.isCI) {
+  } else if (semaphore.isCI) {
     return semaphore
+  } else if (fake.isCI) {
+    return fake
   }
 }