internal: move ParseINI into google

This was the only usage of the function.

Change-Id: I081e20789ea9e37fe96f764641078472153bf577
Reviewed-on: https://go-review.googlesource.com/85197
Reviewed-by: Andrew Bonventre <andybons@golang.org>

google/sdk_test.go

@@ -4,7 +4,11 @@
 
 package google
 
-import "testing"
+import (
+	"reflect"
+	"strings"
+	"testing"
+)
 
 func TestSDKConfig(t *testing.T) {
 	sdkConfigPath = func() (string, error) {
@@ -44,3 +48,60 @@ func TestSDKConfig(t *testing.T) {
 		}
 	}
 }
+
+func TestParseINI(t *testing.T) {
+	tests := []struct {
+		ini  string
+		want map[string]map[string]string
+	}{
+		{
+			`root = toor
+[foo]
+bar = hop
+ini = nin
+`,
+			map[string]map[string]string{
+				"":    {"root": "toor"},
+				"foo": {"bar": "hop", "ini": "nin"},
+			},
+		},
+		{
+			"\t  extra \t =  whitespace  \t\r\n \t [everywhere] \t \r\n  here \t =  \t there  \t \r\n",
+			map[string]map[string]string{
+				"":           {"extra": "whitespace"},
+				"everywhere": {"here": "there"},
+			},
+		},
+		{
+			`[empty]
+[section]
+empty=
+`,
+			map[string]map[string]string{
+				"":        {},
+				"empty":   {},
+				"section": {"empty": ""},
+			},
+		},
+		{
+			`ignore
+[invalid
+=stuff
+;comment=true
+`,
+			map[string]map[string]string{
+				"": {},
+			},
+		},
+	}
+	for _, tt := range tests {
+		result, err := parseINI(strings.NewReader(tt.ini))
+		if err != nil {
+			t.Errorf("parseINI(%q) error %v, want: no error", tt.ini, err)
+			continue
+		}
+		if !reflect.DeepEqual(result, tt.want) {
+			t.Errorf("parseINI(%q) = %#v, want: %#v", tt.ini, result, tt.want)
+		}
+	}
+}