1 files changed, 39 insertions, 0 deletions
diff --git a/src/internal/godebug/godebug_test.go b/src/internal/godebug/godebug_test.go
new file mode 100644
index 0000000..319229d
--- /dev/null
+++ b/src/internal/godebug/godebug_test.go
@@ -0,0 +1,39 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package godebug_test
+
+import (
+	. "internal/godebug"
+	"testing"
+)
+
+func TestGet(t *testing.T) {
+	foo := New("foo")
+	tests := []struct {
+		godebug string
+		setting *Setting
+		want    string
+	}{
+		{"", New(""), ""},
+		{"", foo, ""},
+		{"foo=bar", foo, "bar"},
+		{"foo=bar,after=x", foo, "bar"},
+		{"before=x,foo=bar,after=x", foo, "bar"},
+		{"before=x,foo=bar", foo, "bar"},
+		{",,,foo=bar,,,", foo, "bar"},
+		{"foodecoy=wrong,foo=bar", foo, "bar"},
+		{"foo=", foo, ""},
+		{"foo", foo, ""},
+		{",foo", foo, ""},
+		{"foo=bar,baz", New("loooooooong"), ""},
+	}
+	for _, tt := range tests {
+		t.Setenv("GODEBUG", tt.godebug)
+		got := tt.setting.Value()
+		if got != tt.want {
+			t.Errorf("get(%q, %q) = %q; want %q", tt.godebug, tt.setting.Name(), got, tt.want)
+		}
+	}
+}