def (#12)

Reviewed-on: #12

param/param_test.go

@@ -0,0 +1,49 @@
+package param_test
+
+import (
+	"testing"
+
+	"gitoa.ru/go-4devs/config/param"
+)
+
+func TestChainReplace(t *testing.T) {
+	t.Parallel()
+
+	const (
+		replaceParam = "param1"
+		replaceValue = "replace"
+	)
+
+	params1 := param.With(param.New(), replaceParam, "param1")
+	params2 := param.With(param.New(), replaceParam, replaceValue)
+
+	data, ok := param.String(param.Chain(params1, params2), replaceParam)
+	if !ok {
+		t.Errorf("param %v: not found", replaceParam)
+	}
+
+	if data != replaceValue {
+		t.Errorf("got:%v, expect:%v", data, replaceValue)
+	}
+}
+
+func TestChainExtend(t *testing.T) {
+	t.Parallel()
+
+	const (
+		extendParam = "param1"
+		extendValue = "replace"
+	)
+
+	params1 := param.With(param.New(), extendParam, extendValue)
+	params2 := param.With(param.New(), "new_value", "param2")
+
+	data1, ok := param.String(param.Chain(params1, params2), extendParam)
+	if !ok {
+		t.Errorf("param %v: not found", extendParam)
+	}
+
+	if data1 != extendValue {
+		t.Errorf("got:%v, expect:%v", data1, extendParam)
+	}
+}