✅ tests for typescript transpiling

spec/fixtures/typescript/invalid.ts

@@ -0,0 +1 @@
+var foo = 123 123; // Syntax error

spec/fixtures/typescript/valid.ts

@@ -0,0 +1,2 @@
+var inc = v => v + 1
+export = inc

spec/typescript-spec.coffee

@@ -0,0 +1,36 @@
+typescript = require '../src/typescript'
+crypto = require 'crypto'
+
+describe "TypeScript transpiler support", ->
+  beforeEach ->
+    jasmine.snapshotDeprecations()
+
+  afterEach ->
+    jasmine.restoreDeprecationsSnapshot()
+
+  describe "::createTypeScriptVersionAndOptionsDigest", ->
+    it "returns a digest for the library version and specified options", ->
+      defaultOptions =
+        target: 1 # ES5
+        module: 'commonjs'
+        sourceMap: true
+      version = '1.4.1'
+      shasum = crypto.createHash('sha1')
+      shasum.update('typescript', 'utf8')
+      shasum.update('\0', 'utf8')
+      shasum.update(version, 'utf8')
+      shasum.update('\0', 'utf8')
+      shasum.update('{"target": 1,"module": "commonjs","sourceMap": true,}')
+      expectedDigest = shasum.digest('hex')
+
+      observedDigest = typescript.createTypeScriptVersionAndOptionsDigest(version, defaultOptions)
+      expect(observedDigest).toEqual expectedDigest
+
+  describe "when there is a .ts file", ->
+    it "transpiles it using typescript", ->
+      transpiled = require('./fixtures/typescript/valid.ts')
+      expect(transpiled(3)).toBe 4
+
+  describe "when the .ts file is invalid", ->
+    it "does not transpile", ->
+      expect(-> require('./fixtures/typescript/invalid.ts')).toThrow()

src/typescript.coffee

@@ -14,7 +14,7 @@ stats =
   misses: 0
 
 defaultOptions =
-  target: 1
+  target: 1 # ES5
   module: 'commonjs'
   sourceMap: true