Merged in meta-more-unit-tests (pull request #381)

add unit tests for NewFromMap and EncodeAsString methods

Approved-by: Saxon Milton <saxon.milton@gmail.com>

container/mts/meta/meta_test.go

@@ -216,3 +216,77 @@ func TestKeys(t *testing.T) {
 		t.Errorf("Did not get expected out. \nGot : %v, \nWant: %v\n", got, want)
 	}
 }
+
+// TestNewFromMap checks that we can successfully create a new data struct from a map.
+func TestNewFromMap(t *testing.T) {
+	want := map[string]string{
+		"loc": "a,b,c",
+		"ts":  "12345",
+	}
+
+	meta := NewFromMap(want)
+
+	got := meta.All()
+
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("Did not get expected out. \nGot : %v, \nWant: %v\n", got, want)
+	}
+}
+
+// TestEncodeAsString checks that metadata is correctly encoded as a string.
+func TestEncodeAsString(t *testing.T) {
+	meta := NewFromMap(map[string]string{
+		"loc": "a,b,c",
+		"ts":  "12345",
+	})
+
+	got := meta.EncodeAsString()
+	want1 := "loc=a,b,c\tts=12345"
+	want2 := "ts=12345\tloc=a,b,c"
+
+	if got != want1 && got != want2 {
+		t.Errorf("Did not get expected out. \nGot : %v, \nWant: %v or %v\n", got, want1, want2)
+	}
+}
+
+// TestDeleteOrder checks that the order of keys is correct after a deletion.
+func TestDeleteOrder(t *testing.T) {
+	tests := []struct {
+		delKey string
+		want   []string
+	}{
+		{
+			"key1",
+			[]string{"key2", "key3", "key4"},
+		},
+		{
+			"key2",
+			[]string{"key1", "key3", "key4"},
+		},
+		{
+			"key3",
+			[]string{"key1", "key2", "key4"},
+		},
+		{
+			"key4",
+			[]string{"key1", "key2", "key3"},
+		},
+	}
+
+	for _, test := range tests {
+		t.Logf("deleting %s", test.delKey)
+		meta := NewWith([][2]string{
+			{"key1", "val1"},
+			{"key2", "val2"},
+			{"key3", "val3"},
+			{"key4", "val4"},
+		})
+		meta.Delete(test.delKey)
+
+		got := meta.order
+		want := test.want
+		if !reflect.DeepEqual(got, want) {
+			t.Errorf("Did not get expected out. \nGot:  %v, \nWant: %v\n", got, want)
+		}
+	}
+}