fix: make coverage happy

Signed-off-by: gfanton <[email protected]>

tm2/pkg/bft/config/config_test.go

@@ -185,3 +185,28 @@ func TestConfig_ValidateBaseConfig(t *testing.T) {
 		assert.ErrorIs(t, c.BaseConfig.ValidateBasic(), errInvalidProfListenAddress)
 	})
 }
+
+func TestConfig_DBDir(t *testing.T) {
+	t.Parallel()
+
+	t.Run("DB path is absolute", func(t *testing.T) {
+		t.Parallel()
+
+		c := DefaultConfig()
+		c.RootDir = "/root"
+		c.DBPath = "/abs/path"
+
+		assert.Equal(t, c.DBPath, c.DBDir())
+		assert.NotEqual(t, filepath.Join(c.RootDir, c.DBPath), c.DBDir())
+	})
+
+	t.Run("DB path is relative", func(t *testing.T) {
+		t.Parallel()
+
+		c := DefaultConfig()
+		c.RootDir = "/root"
+		c.DBPath = "relative/path"
+
+		assert.Equal(t, filepath.Join(c.RootDir, c.DBPath), c.DBDir())
+	})
+}