diff --git a/.gitignore b/.gitignore
index 5544386..a240ef6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,5 @@
 upload/
 build/
 temp/
+typings/
+typings.json
diff --git a/spec/bios.spec.js b/spec/bios.spec.js
new file mode 100644
index 0000000..7d5d92d
--- /dev/null
+++ b/spec/bios.spec.js
@@ -0,0 +1,26 @@
+var bios = require('../javascript/decrypt_bios.js');
+
+describe("Decryp BIOS", function() {
+    it("Sony key for 1234567 is 9648669", function() {
+        expect(bios.Sony.solve("1234567")).toEqual(["9648669"]);
+    });
+
+    it("Sony input validation", function() {
+        expect(bios.Sony.check("1234")).toBe(false);
+        expect(bios.Sony.check("1234567")).toBe(true);
+        expect(bios.Sony.check("0123456")).toBe(true);
+        expect(bios.Sony.check("123o567")).toBe(false);
+    });
+
+    it("Samsung key for 07088120410C0000 is 12345", function() {
+        expect(bios.Samsung.solve("07088120410C0000")).toEqual(["12345"]);
+    });
+
+    it("Samsung input validation", function() {
+        expect(bios.Samsung.check("07088120410C0000")).toBe(true);
+        expect(bios.Samsung.check("07088120410C")).toBe(true);
+        expect(bios.Samsung.check("07088120410C00")).toBe(true);
+        expect(bios.Samsung.check("0123456")).toBe(false);
+        expect(bios.Samsung.check("07088a20410C00")).toBe(true);
+    });
+});
diff --git a/tsconfig.json b/tsconfig.json
index c33b26f..ceb144f 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,9 +3,13 @@
         "module": "commonjs",
         "target": "es3",
         "noImplicitAny": true,
-        "sourceMap": false
+        "sourceMap": false,
+        "outDir": "javascript/"
     },
     "exclude": [
         "node_modules"
+    ],
+    "files": [
+        "scripts/decrypt_bios.ts"
     ]
 }