Identity v3 Projects List (#163)

* Identity v3 Projects List

* Rename ToListQuery to ToProjectListQuery
diff --git a/openstack/identity/v3/projects/testing/fixtures.go b/openstack/identity/v3/projects/testing/fixtures.go
new file mode 100644
index 0000000..c4d9c03
--- /dev/null
+++ b/openstack/identity/v3/projects/testing/fixtures.go
@@ -0,0 +1,80 @@
+package testing
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/gophercloud/gophercloud/openstack/identity/v3/projects"
+	th "github.com/gophercloud/gophercloud/testhelper"
+	"github.com/gophercloud/gophercloud/testhelper/client"
+)
+
+// ListOutput provides a single page of Project results.
+const ListOutput = `
+{
+  "projects": [
+    {
+      "is_domain": false,
+      "description": "The team that is red",
+      "domain_id": "default",
+      "enabled": true,
+      "id": "1234",
+      "name": "Red Team",
+      "parent_id": null
+    },
+    {
+      "is_domain": false,
+      "description": "The team that is blue",
+      "domain_id": "default",
+      "enabled": true,
+      "id": "9876",
+      "name": "Blue Team",
+      "parent_id": null
+    }
+  ],
+  "links": {
+    "next": null,
+    "previous": null
+  }
+}
+`
+
+// RedTeam is a Project fixture.
+var RedTeam = projects.Project{
+	IsDomain:    false,
+	Description: "The team that is red",
+	DomainID:    "default",
+	Enabled:     true,
+	ID:          "1234",
+	Name:        "Red Team",
+	ParentID:    "",
+}
+
+// BlueTeam is a Project fixture.
+var BlueTeam = projects.Project{
+	IsDomain:    false,
+	Description: "The team that is blue",
+	DomainID:    "default",
+	Enabled:     true,
+	ID:          "9876",
+	Name:        "Blue Team",
+	ParentID:    "",
+}
+
+// ExpectedProjectSlice is the slice of projects expected to be returned from ListOutput.
+var ExpectedProjectSlice = []projects.Project{RedTeam, BlueTeam}
+
+// HandleListProjectSuccessfully creates an HTTP handler at `/projects` on the
+// test handler mux that responds with a list of two tenants.
+func HandleListProjectsSuccessfully(t *testing.T) {
+	th.Mux.HandleFunc("/projects", func(w http.ResponseWriter, r *http.Request) {
+		th.TestMethod(t, r, "GET")
+		th.TestHeader(t, r, "Accept", "application/json")
+		th.TestHeader(t, r, "X-Auth-Token", client.TokenID)
+
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		fmt.Fprintf(w, ListOutput)
+	})
+}