Fix a silly bug and add test coverage

transaction_test.go

@@ -99,15 +99,62 @@ func TestPAM_004(t *testing.T) {
 }
 
 func TestGetEnvList(t *testing.T) {
-	tx, err := StartFunc("passwd", "test", func(s Style, msg string) (string, error) {
+	tx, err := StartFunc("", "", func(s Style, msg string) (string, error) {
 		return "", nil
 	})
 	if err != nil {
 		t.Fatalf("start #error: %v", err)
 	}
+
 	m, err := tx.GetEnvList()
 	if err != nil {
 		t.Fatalf("getenvlist #error: %v", err)
 	}
-	t.Log(m)
+	n := len(m)
+	if n != 0 {
+		t.Fatalf("putenv #error: expected 0 items, got %v", n)
+	}
+
+	vals := []string{
+		"VAL1=1",
+		"VAL2=2",
+		"VAL3=3",
+	}
+	for _, s := range vals {
+		err = tx.PutEnv(s)
+		if err != nil {
+			t.Fatalf("putenv #error: %v", err)
+		}
+	}
+
+	s := tx.GetEnv("VAL1")
+	if s != "1" {
+		t.Fatalf("getenv #error: expected 1, got %v", s)
+	}
+	s = tx.GetEnv("VAL2")
+	if s != "2" {
+		t.Fatalf("getenv #error: expected 2, got %v", s)
+	}
+	s = tx.GetEnv("VAL3")
+	if s != "3" {
+		t.Fatalf("getenv #error: expected 3, got %v", s)
+	}
+
+	m, err = tx.GetEnvList()
+	if err != nil {
+		t.Fatalf("getenvlist #error: %v", err)
+	}
+	n = len(m)
+	if n != 3 {
+		t.Fatalf("getenvlist #error: expected 3 items, got %v", n)
+	}
+	if m["VAL1"] != "1" {
+		t.Fatalf("getenvlist #error: expected 1, got %v", m["VAL1"])
+	}
+	if m["VAL2"] != "2" {
+		t.Fatalf("getenvlist #error: expected 2, got %v", m["VAL1"])
+	}
+	if m["VAL3"] != "3" {
+		t.Fatalf("getenvlist #error: expected 3, got %v", m["VAL1"])
+	}
 }