Add terratest (#58)

* Add terratest

* Add alpine makefile

Author: osterman

codefresh/test.yml

@@ -21,6 +21,7 @@ steps:
     commands:
     - make init
     - make -C test/ clean init
+    - make -C test/src clean init
 
   test:
     type: "parallel"
@@ -37,15 +38,22 @@ steps:
         - make readme/lint
 
       test_module:
-        title: Test module
+        title: Test module with bats
         image: ${{TEST_IMAGE}}
         stage: Test
         commands:
         - make -C test/ module
 
       test_examples_complete:
-        title: Test "examples/complete"
+        title: Test "examples/complete" with bats
         image: ${{TEST_IMAGE}}
         stage: Test
         commands:
         - make -C test/ examples/complete
+
+      test_examples_complete_terratest:
+        title: Test "examples/complete" with terratest
+        image: ${{TEST_IMAGE}}
+        stage: Test
+        commands:
+        - make -C test/src

test/Makefile

@@ -12,30 +12,30 @@ endef
 
 default: all
 
-# Provision the test-harnesss
+## Provision the test-harnesss
 .test-harness:
 	[ -d $@ ] || git clone --depth=1 -b $(TEST_HARNESS_BRANCH) $(TEST_HARNESS) $@
 
-# Initialize the tests
+## Initialize the tests
 init: .test-harness
 
-# Clean up the test harness
+## Clean up the test harness
 clean:
 	[ "$(TEST_HARNESS_PATH)" == "/" ] || rm -rf $(TEST_HARNESS_PATH)
 
-# Run all tests
+## Run all tests
 all: module examples/complete
 
-# Install all dependencies (OS specific)
+## Install all dependencies (OS specific)
 deps: init
 	@[ ! -x /sbin/apk ] || apk add --update terraform-docs@cloudposse
 
-# Run basic sanity checks against the module itself
+## Run basic sanity checks against the module itself
 module: export TESTS ?= installed lint get-modules validate terraform-docs input-descriptions output-descriptions
 module: deps
 	$(call RUN_TESTS, ../)
 
-# Run tests against example
+## Run tests against example
 examples/complete: export TESTS ?= init plan apply
 examples/complete: deps
 	$(call RUN_TESTS, ../$@)

test/src/.gitignore

@@ -0,0 +1,2 @@
+.gopath
+vendor/

test/src/Gopkg.lock

@@ -0,0 +1,7 @@
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  version = "1.2.2"
+
+[prune]
+  go-tests = true
+  unused-packages = true

test/src/Gopkg.toml

@@ -0,0 +1,42 @@
+PACKAGE  = terraform-null-label
+GOPATH   = $(CURDIR)/.gopath
+GOBIN    = $(GOPATH)/bin
+BASE     = $(GOPATH)/src/$(PACKAGE)
+PATH 	:= $(PATH):$(GOBIN)
+
+.PHONY: all
+## Default target
+all: test
+
+-include Makefile.*
+
+export GOPATH
+
+## Prepare the GOPATH
+$(BASE):
+	@mkdir -p $(dir $@)
+	@ln -sf $(CURDIR) $@
+
+## install OS-specific dependencies. See Makefile.*
+deps::
+	@exit 0
+
+.PHONY : init
+## Initialize tests
+init: | $(BASE)
+
+.PHONY : ensure
+## Install test dependencies
+ensure:
+	cd $(BASE) && dep ensure
+
+.PHONY : test
+## Run tests
+test: deps ensure
+	cd $(BASE) && go test -v -timeout 30m -run TestExamplesComplete
+
+## Clean up files
+clean:
+	rm -rf .gopath/ vendor/
+
+

test/src/Makefile

@@ -0,0 +1,8 @@
+ifneq (,$(wildcard /sbin/apk))
+.PHONY : deps
+deps::
+	mkdir -p $(GOBIN)
+	apk add --update go
+	@curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
+endif
+

test/src/Makefile.alpine

@@ -0,0 +1,42 @@
+package test
+
+import (
+	"testing"
+
+	"github.com/gruntwork-io/terratest/modules/terraform"
+	"github.com/stretchr/testify/assert"
+)
+
+// Test the Terraform module in examples/complete using Terratest.
+func TestExamplesComplete(t *testing.T) {
+	t.Parallel()
+
+	terraformOptions := &terraform.Options{
+		// The path to where our Terraform code is located
+		TerraformDir: "../../examples/complete",
+	}
+
+	// At the end of the test, run `terraform destroy` to clean up any resources that were created
+	defer terraform.Destroy(t, terraformOptions)
+
+	// This will run `terraform init` and `terraform apply` and fail the test if there are any errors
+	terraform.InitAndApply(t, terraformOptions)
+
+	// Run `terraform output` to get the value of an output variable
+	label1 := terraform.OutputMap(t, terraformOptions, "label1")
+
+	// Verify we're getting back the outputs we expect
+	assert.Equal(t, "winstonchurchroom-uat-build-fire-water-earth-air", label1["id"])
+
+	// Run `terraform output` to get the value of an output variable
+	label2 := terraform.OutputMap(t, terraformOptions, "label2")
+
+	// Verify we're getting back the outputs we expect
+	assert.Equal(t, "charlie+uat+test+fire+water+earth+air", label2["id"])
+
+	// Run `terraform output` to get the value of an output variable
+	label3 := terraform.OutputMap(t, terraformOptions, "label3")
+
+	// Verify we're getting back the outputs we expect
+	assert.Equal(t, "starfish.uat.release.fire.water.earth.air", label3["id"])
+}