tags: Adds tests for reading tags.

Signed-off-by: Mark Laing <mark.laing@canonical.com>

tags_test.go

@@ -0,0 +1,50 @@
+package gomaasapi
+
+import (
+	"github.com/juju/testing"
+	jc "github.com/juju/testing/checkers"
+	gc "gopkg.in/check.v1"
+)
+
+type tagSuite struct {
+	testing.LoggingCleanupSuite
+}
+
+var _ = gc.Suite(&tagSuite{})
+
+func (*tagSuite) TestReadTags(c *gc.C) {
+	tags, err := readTags(twoDotOh, parseJSON(c, tagsResponse))
+	c.Assert(err, jc.ErrorIsNil)
+	c.Assert(tags, gc.HasLen, 3)
+
+	tag := tags[0]
+
+	c.Check(tag.Name(), gc.Equals, "virtual")
+	c.Check(tag.Comment(), gc.Equals, "virtual machines")
+	c.Check(tag.Definition(), gc.Equals, "tag for machines that are virtual")
+	c.Check(tag.KernelOpts(), gc.Equals, "nvme_core")
+}
+
+var tagsResponse = `[
+	{
+		"resource_uri": "/2.0/tags/virtual",
+		"name": "virtual",
+		"comment": "virtual machines",
+		"definition": "tag for machines that are virtual",
+		"kernel_opts": "nvme_core"
+	},
+	{
+		"resource_uri": "/2.0/tags/physical",
+		"name": "physical",
+		"comment": "physical machines",
+		"definition": "tag for machines that are physical",
+		"kernel_opts": ""
+	},
+	{
+		"resource_uri": "/2.0/tags/r-pi",
+		"name": "r-pi",
+		"comment": "raspberry pis'",
+		"definition": "tag for machines that are raspberry pis",
+		"kernel_opts": ""
+	}
+]`