New --context flag for adding datasources to context

Signed-off-by: Dave Henderson <dhenderson@gmail.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/context_test.go b/context_test.go
index 16492e9a..f2780356 100644
--- a/context_test.go
+++ b/context_test.go
@@ -1,9 +1,12 @@
 package gomplate
 
 import (
+	"net/url"
 	"os"
 	"testing"
 
+	"github.com/hairyhenderson/gomplate/data"
+
 	"github.com/stretchr/testify/assert"
 )
 
@@ -19,3 +22,49 @@ func TestEnvGetsUpdatedEnvironment(t *testing.T) {
 	assert.NoError(t, os.Setenv("FOO", "foo"))
 	assert.Equal(t, c.Env()["FOO"], "foo")
 }
+
+func TestCreateContext(t *testing.T) {
+	c, err := createContext(nil, nil)
+	assert.NoError(t, err)
+	assert.Empty(t, c)
+
+	fooURL := "env:///foo?type=application/yaml"
+	barURL := "env:///bar?type=application/yaml"
+	uf, _ := url.Parse(fooURL)
+	ub, _ := url.Parse(barURL)
+	d := &data.Data{
+		Sources: map[string]*data.Source{
+			"foo": {URL: uf},
+			".":   {URL: ub},
+		},
+	}
+	os.Setenv("foo", "foo: bar")
+	defer os.Unsetenv("foo")
+	c, err = createContext([]string{"foo=" + fooURL}, d)
+	assert.NoError(t, err)
+	assert.IsType(t, &context{}, c)
+	ctx := c.(*context)
+	ds := ((*ctx)["foo"]).(map[string]interface{})
+	assert.Equal(t, "bar", ds["foo"])
+
+	os.Setenv("bar", "bar: baz")
+	defer os.Unsetenv("bar")
+	c, err = createContext([]string{".=" + barURL}, d)
+	assert.NoError(t, err)
+	assert.IsType(t, map[string]interface{}{}, c)
+	ds = c.(map[string]interface{})
+	assert.Equal(t, "baz", ds["bar"])
+}
+
+func TestParseAlias(t *testing.T) {
+	testdata := map[string]string{
+		"":        "",
+		"foo":     "foo",
+		"foo.bar": "foo",
+		"a=b":     "a",
+		".=foo":   ".",
+	}
+	for k, v := range testdata {
+		assert.Equal(t, v, parseAlias(k))
+	}
+}