Added test cases for get-payload and get-task

github-deploy/test/deployment-get-payload.bats

@@ -0,0 +1,25 @@
+#!/usr/bin/env bats
+
+#load bootstrap
+
+PATH="$PATH:$BATS_TEST_DIRNAME/../bin"
+
+export GITHUB_EVENT_PATH="$BATS_TEST_DIRNAME/fixtures/deployment.json"
+
+@test "return error code if not given a parameter" {
+  run deployment-get-payload
+  [ "$status" -eq 64 ]
+}
+
+@test "returns correct payload item" {
+  run deployment-get-payload test_payload
+  [ "$status" -eq 0 ]
+  [ "$output" = "value" ]
+}
+
+
+@test "returns empty string if payload does not exist" {
+  run deployment-get-payload foo_payload
+  [ "$status" -eq 0 ]
+  [ "$output" = "" ]
+}

github-deploy/test/deployment-get-task.bats

@@ -0,0 +1,11 @@
+#!/usr/bin/env bats
+
+PATH="$PATH:$BATS_TEST_DIRNAME/../bin"
+
+export GITHUB_EVENT_PATH="$BATS_TEST_DIRNAME/fixtures/deployment.json"
+
+@test "returs deployment task" {
+  run deployment-get-task
+  [ "$status" -eq 0 ]
+  [ "$output" = "deploy" ]
+}

github-deploy/test/fixtures/deployment.json

@@ -7,6 +7,9 @@
     "ref": "master",
     "task": "deploy",
     "payload": {
+      "config": {
+        "test_payload": "value"
+      }
     },
     "environment": "production",
     "description": null,