agent: config loading tests

command/agent/config_test.go

@@ -1,6 +1,9 @@
 package agent
 
 import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
 	"reflect"
 	"testing"
 )
@@ -43,3 +46,139 @@ func TestConfig_Merge(t *testing.T) {
 		t.Fatalf("bad: %#v", result)
 	}
 }
+
+func TestConfig_LoadConfigFile(t *testing.T) {
+	// Fails if the file doesn't exist
+	if _, err := LoadConfigFile("/unicorns/leprechauns"); err == nil {
+		t.Fatalf("expected error, got nothing")
+	}
+
+	fh, err := ioutil.TempFile("", "nomad")
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	defer os.RemoveAll(fh.Name())
+
+	// Invalid content returns error
+	if _, err := fh.WriteString("nope"); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if _, err := LoadConfigFile(fh.Name()); err == nil {
+		t.Fatalf("expected load error, got nothing")
+	}
+
+	// Valid content parses successfully
+	if err := fh.Truncate(0); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if _, err := fh.Seek(0, 0); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if _, err := fh.WriteString(`{"region":"west"}`); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	config, err := LoadConfigFile(fh.Name())
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if config.Region != "west" {
+		t.Fatalf("bad region: %q", config.Region)
+	}
+}
+
+func TestConfig_LoadConfigDir(t *testing.T) {
+	// Fails if the dir doesn't exist.
+	if _, err := LoadConfigDir("/unicorns/leprechauns"); err == nil {
+		t.Fatalf("expected error, got nothing")
+	}
+
+	dir, err := ioutil.TempDir("", "nomad")
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	defer os.RemoveAll(dir)
+
+	file1 := filepath.Join(dir, "conf1.hcl")
+	err = ioutil.WriteFile(file1, []byte(`{"region":"west"}`), 0600)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	file2 := filepath.Join(dir, "conf2.hcl")
+	err = ioutil.WriteFile(file2, []byte(`{"datacenter":"sfo"}`), 0600)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	file3 := filepath.Join(dir, "conf3.hcl")
+	err = ioutil.WriteFile(file3, []byte(`nope`), 0600)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	// Fails if we have a bad config file
+	if _, err := LoadConfigDir(dir); err == nil {
+		t.Fatalf("expected load error, got nothing")
+	}
+
+	if err := os.Remove(file3); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	// Works if configs are valid
+	config, err := LoadConfigDir(dir)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if config.Region != "west" || config.Datacenter != "sfo" {
+		t.Fatalf("bad: %#v", config)
+	}
+}
+
+func TestConfig_LoadConfig(t *testing.T) {
+	// Fails if the target doesn't exist
+	if _, err := LoadConfig("/unicorns/leprechauns"); err == nil {
+		t.Fatalf("expected error, got nothing")
+	}
+
+	fh, err := ioutil.TempFile("", "nomad")
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	defer os.Remove(fh.Name())
+
+	if _, err := fh.WriteString(`{"region":"west"}`); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	// Works on a config file
+	config, err := LoadConfig(fh.Name())
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if config.Region != "west" {
+		t.Fatalf("bad: %#v", config)
+	}
+
+	dir, err := ioutil.TempDir("", "nomad")
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	defer os.RemoveAll(dir)
+
+	file1 := filepath.Join(dir, "config1.hcl")
+	err = ioutil.WriteFile(file1, []byte(`{"datacenter":"sfo"}`), 0600)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	// Works on config dir
+	config, err = LoadConfig(dir)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if config.Datacenter != "sfo" {
+		t.Fatalf("bad: %#v", config)
+	}
+}