Create tests for Stoppable.

contracts/test-helpers/StoppableMock.sol

@@ -2,9 +2,14 @@ pragma solidity ^0.4.0;
 import '../Stoppable.sol';
 
 // mock class using Stoppable
-contract StoppableMock is Stoppable {
+contract StoppableMock is Stoppable(msg.sender) {
   bool public drasticMeasureTaken;
-  uint public count = 0;
+  uint public count;
+
+  function StoppableMock() Stoppable(msg.sender){
+    drasticMeasureTaken = false;
+    count = 0;
+  }
 
   function normalProcess() external stopInEmergency {
     count++;

test/Stoppable.js

@@ -0,0 +1,108 @@
+contract('Stoppable', function(accounts) {
+
+  it("can perform normal process in non-emergency", function(done) {
+    var stoppable;
+    return StoppableMock.new(accounts[0])
+      .then(function(_stoppable) {
+        stoppable = _stoppable;
+        return stoppable.count();
+      })
+      .then(function(count) {
+        assert.equal(count, 0);
+      })
+      .then(function () {
+        return stoppable.normalProcess();
+      })
+      .then(function() {
+        return stoppable.count();
+      })
+      .then(function(count) {
+        assert.equal(count, 1);
+      })
+      .then(done);
+  });
+
+  it("can not perform normal process in emergency", function(done) {
+    var stoppable;
+    return StoppableMock.new(accounts[0])
+      .then(function(_stoppable) {
+        stoppable = _stoppable;
+        return stoppable.emergencyStop();
+      })
+      .then(function () {
+        return stoppable.count();
+      })
+      .then(function(count) {
+        assert.equal(count, 0);
+      })
+      .then(function () {
+        return stoppable.normalProcess();
+      })
+      .then(function() {
+        return stoppable.count();
+      })
+      .then(function(count) {
+        assert.equal(count, 0);
+      })
+      .then(done);
+  });
+
+
+  it("can not take drastic measure in non-emergency", function(done) {
+    var stoppable;
+    return StoppableMock.new(accounts[0])
+      .then(function(_stoppable) {
+        stoppable = _stoppable;
+        return stoppable.drasticMeasure();
+      })
+      .then(function() {
+        return stoppable.drasticMeasureTaken();
+      })
+      .then(function(taken) {
+        assert.isFalse(taken);
+      })
+      .then(done);
+  });
+
+  it("can take a drastic measure in an emergency", function(done) {
+    var stoppable;
+    return StoppableMock.new(accounts[0])
+      .then(function(_stoppable) {
+        stoppable = _stoppable;
+        return stoppable.emergencyStop();
+      })
+      .then(function() {
+        return stoppable.drasticMeasure();
+      })
+      .then(function() {
+        return stoppable.drasticMeasureTaken();
+      })
+      .then(function(taken) {
+        assert.isTrue(taken);
+      })
+      .then(done);
+  });
+
+  it("should resume allowing normal process after emergency is over", function(done) {
+    var stoppable;
+    return StoppableMock.new(accounts[0])
+      .then(function(_stoppable) {
+        stoppable = _stoppable;
+        return stoppable.emergencyStop();
+      })
+      .then(function () {
+        return stoppable.release();
+      })
+      .then(function() {
+        return stoppable.normalProcess();
+      })
+      .then(function() {
+        return stoppable.count();
+      })
+      .then(function(count) {
+        assert.equal(count, 1);
+      })
+      .then(done);
+  });
+
+});