feat(Go-StudyExample):2021/02/09:新增merge源码阅读和单测代码

SourceAnalysisAndTool/mergo@v0.3.11/v039_bugs_test.go

@@ -0,0 +1,92 @@
+package mergo_test
+
+import (
+	"testing"
+
+	"github.com/imdario/mergo"
+)
+
+type inner struct {
+	A int
+}
+
+type outer struct {
+	inner
+	B int
+}
+
+func TestV039Issue139(t *testing.T) {
+	dst := outer{
+		inner: inner{A: 1},
+		B:     2,
+	}
+	src := outer{
+		inner: inner{A: 10},
+		B:     20,
+	}
+	err := mergo.MergeWithOverwrite(&dst, src)
+	if err != nil {
+		panic(err.Error())
+	}
+	if dst.inner.A == 1 {
+		t.Errorf("expected %d, got %d", src.inner.A, dst.inner.A)
+	}
+}
+
+func TestV039Issue152(t *testing.T) {
+	dst := map[string]interface{}{
+		"properties": map[string]interface{}{
+			"field1": map[string]interface{}{
+				"type": "text",
+			},
+			"field2": "ohai",
+		},
+	}
+	src := map[string]interface{}{
+		"properties": map[string]interface{}{
+			"field1": "wrong",
+		},
+	}
+	if err := mergo.Map(&dst, src, mergo.WithOverride); err != nil {
+		t.Error(err)
+	}
+}
+
+type issue146Foo struct {
+	A string
+	B map[string]issue146Bar
+}
+
+type issue146Bar struct {
+	C *string
+	D *string
+}
+
+func TestV039Issue146(t *testing.T) {
+	var (
+		s1 = "asd"
+		s2 = "sdf"
+	)
+	dst := issue146Foo{
+		A: "two",
+		B: map[string]issue146Bar{
+			"foo": {
+				C: &s1,
+			},
+		},
+	}
+	src := issue146Foo{
+		A: "one",
+		B: map[string]issue146Bar{
+			"foo": {
+				D: &s2,
+			},
+		},
+	}
+	if err := mergo.Merge(&dst, src, mergo.WithOverride); err != nil {
+		t.Error(err)
+	}
+	if dst.B["foo"].D == nil {
+		t.Errorf("expected %v, got nil", &s2)
+	}
+}