From e5e44373517112641a3b2a613d7ebe19497f4388 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Sun, 17 Aug 2014 14:45:43 -0700
Subject: [PATCH] helper/schema: start Provider

---
 helper/schema/provider.go      | 40 +++++++++++++++++++++++++++++
 helper/schema/provider_test.go | 47 ++++++++++++++++++++++++++++++++++
 2 files changed, 87 insertions(+)
 create mode 100644 helper/schema/provider.go
 create mode 100644 helper/schema/provider_test.go

diff --git a/helper/schema/provider.go b/helper/schema/provider.go
new file mode 100644
index 000000000..d6f1c1a0b
--- /dev/null
+++ b/helper/schema/provider.go
@@ -0,0 +1,40 @@
+package schema
+
+import (
+	"fmt"
+
+	"github.com/hashicorp/terraform/terraform"
+)
+
+// Provider represents a Resource provider in Terraform, and properly
+// implements all of the ResourceProvider API.
+//
+// This is a friendlier API than the core Terraform ResourceProvider API,
+// and is recommended to be used over that.
+type Provider struct {
+	Schema    map[string]*Schema
+	Resources map[string]*Resource
+
+	Configure ConfigureFunc
+}
+
+// ConfigureFunc is the function used to configure a Provider.
+type ConfigureFunc func(*ResourceData) error
+
+// Validate validates the provider configuration against the schema.
+func (p *Provider) Validate(c *terraform.ResourceConfig) ([]string, []error) {
+	return schemaMap(p.Schema).Validate(c)
+}
+
+// ValidateResource validates the resource configuration against the
+// proper schema.
+func (p *Provider) ValidateResource(
+	t string, c *terraform.ResourceConfig) ([]string, []error) {
+	r, ok := p.Resources[t]
+	if !ok {
+		return nil, []error{fmt.Errorf(
+			"Provider doesn't support resource: %s", t)}
+	}
+
+	return r.Validate(c)
+}
diff --git a/helper/schema/provider_test.go b/helper/schema/provider_test.go
new file mode 100644
index 000000000..aebffa81e
--- /dev/null
+++ b/helper/schema/provider_test.go
@@ -0,0 +1,47 @@
+package schema
+
+import (
+	"testing"
+
+	"github.com/hashicorp/terraform/config"
+	"github.com/hashicorp/terraform/terraform"
+)
+
+func TestProviderValidateResource(t *testing.T) {
+	cases := []struct {
+		P      *Provider
+		Type   string
+		Config map[string]interface{}
+		Err    bool
+	}{
+		{
+			P:      &Provider{},
+			Type:   "foo",
+			Config: nil,
+			Err:    true,
+		},
+
+		{
+			P: &Provider{
+				Resources: map[string]*Resource{
+					"foo": &Resource{},
+				},
+			},
+			Type:   "foo",
+			Config: nil,
+			Err:    false,
+		},
+	}
+
+	for i, tc := range cases {
+		c, err := config.NewRawConfig(tc.Config)
+		if err != nil {
+			t.Fatalf("err: %s", err)
+		}
+
+		_, es := tc.P.ValidateResource(tc.Type, terraform.NewResourceConfig(c))
+		if (len(es) > 0) != tc.Err {
+			t.Fatalf("%d: %#v", i, es)
+		}
+	}
+}