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

SourceAnalysisAndTool/mergo@v0.3.11/issue89_test.go

@@ -0,0 +1,57 @@
+package mergo_test
+
+import (
+	"testing"
+
+	"github.com/imdario/mergo"
+)
+
+func TestIssue89Boolean(t *testing.T) {
+	type Foo struct {
+		Bar bool `json:"bar"`
+	}
+
+	src := Foo{Bar: true}
+	dst := Foo{Bar: false}
+
+	if err := mergo.Merge(&dst, src); err != nil {
+		t.Error(err)
+	}
+	if dst.Bar == false {
+		t.Errorf("expected true, got false")
+	}
+}
+
+func TestIssue89MergeWithEmptyValue(t *testing.T) {
+	p1 := map[string]interface{}{
+		"A": 3, "B": "note", "C": true,
+	}
+	p2 := map[string]interface{}{
+		"B": "", "C": false,
+	}
+	if err := mergo.Merge(&p1, p2, mergo.WithOverwriteWithEmptyValue); err != nil {
+		t.Error(err)
+	}
+	testCases := []struct {
+		key      string
+		expected interface{}
+	}{
+		{
+			"A",
+			3,
+		},
+		{
+			"B",
+			"",
+		},
+		{
+			"C",
+			false,
+		},
+	}
+	for _, tC := range testCases {
+		if p1[tC.key] != tC.expected {
+			t.Errorf("expected %v in p1[%q], got %v", tC.expected, tC.key, p1[tC.key])
+		}
+	}
+}