Add tests.

Test detect module.
Test buildkite service detector.
Edit snap service detector test to cover all paths.

test/detect.js

@@ -0,0 +1,25 @@
+
+var detect = require("../lib/detect");
+var execSync = require('child_process').execSync;
+if (!execSync) {
+  var exec = require('execSync').exec;
+  var execSync = function(cmd){
+    return exec(cmd).stdout;
+  };
+}
+
+describe("Codecov", function(){
+
+  it("can detect existing appveyor service", function(){
+    process.env.APPVEYOR = "true";
+
+    expect(detect().service).to.eql("appveyor");
+  });
+
+  it("can select local git service if no service is found", function(){
+    process.env.APPVEYOR = "";
+
+    expect(detect().commit).to.match(/^\w{40}$/);
+    expect(detect().commit).to.eql(execSync("git rev-parse HEAD || hg id -i --debug | tr -d '+'").toString().trim());
+  })
+});

test/services/buildkite.js

@@ -0,0 +1,27 @@
+var buildkite = require("../../lib/services/buildkite");
+
+describe("Buildkite CI Provider", function(){
+
+  it ("can detect buildkite", function(){
+    process.env.BUILDKITE = "true";
+    expect(buildkite.detect()).to.be(true);
+  });
+
+  it ("can get buildkite env info", function(){
+    process.env.BUILDKITE_BUILD_NUMBER = "1";
+    process.env.BUILDKITE_BUILD_URL = "url";
+    process.env.BUILDKITE_COMMIT = "commit";
+    process.env.BUILDKITE_BRANCH = "branch";
+    process.env.BUILDKITE_PROJECT_SLUG = "slug";
+
+    expect(buildkite.configuration()).to.eql({
+      service : 'buildkite',
+      build : "1",
+      build_url : "url",
+      commit : "commit",
+      branch : "branch",
+      slug : "slug"
+    });
+  });
+
+});

test/services/snap.js

@@ -23,10 +23,11 @@ describe("Snap CI Provider", function(){
   });
 
   it ("can get snap env info get_commit_status for pull requests", function(){
+    process.env.SNAP_COMMIT = '';
     process.env.SNAP_BRANCH = '';
     process.env.SNAP_CI = "true";
     process.env.SNAP_PIPELINE_COUNTER = '1234';
-    process.env.SNAP_COMMIT = '5678';
+    process.env.SNAP_UPSTREAM_COMMIT = '5678';
     process.env.SNAP_UPSTREAM_BRANCH = 'upstream-branch';
     process.env.SNAP_PULL_REQUEST_NUMBER = 'blah';
     expect(snap.configuration()).to.eql({