fix cnf/json set() method not to override already existing keys on same object level | update tests accordingly

internal/cnf/json.go

@@ -2,7 +2,6 @@ package cnf
 
 import (
 	"encoding/json"
-	"fmt"
 	"io"
 	"strings"
 )
@@ -77,6 +76,7 @@ func (d *Json) Set(_path, _value string) bool {
 
 	// 1. browse path + create it if does not exist
 	path := strings.Split(_path, ".")
+	lp := len(path)
 	chain, found := d.browse(_path)
 
 	// 2. if found -> set value
@@ -85,7 +85,7 @@ func (d *Json) Set(_path, _value string) bool {
 		if !ok { // impossible
 			return false
 		}
-		key := path[len(path)-1]
+		key := path[lp-1]
 		mapWrapper[key] = _value
 		return true
 	}
@@ -95,32 +95,36 @@ func (d *Json) Set(_path, _value string) bool {
 	current := root
 
 	// create children until second to last
-	fmt.Printf("%d / %d\n", len(chain)-1, len(path))
-	for i, l := len(chain)-1, len(path)-1; i < l; i++ {
+	for i, l := len(chain)-1, lp-1; i < l; i++ {
 		child := make(map[string]interface{})
-		fmt.Printf("add '%s'\n", path[i])
 		current[path[i]] = child
 		current = child
 	}
 
 	// set value
-	current[path[len(path)-1]] = _value
+	current[path[lp-1]] = _value
 
 	// replace whole object if empty
 	if len(chain) < 2 {
-		d.data = root
+		wrapper, ok := d.data.(map[string]interface{})
+		if !ok { // impossible
+			return false
+		}
+		key := path[0]
+		wrapper[key] = root[key] // store with key ; eitherway it will erase all brother keys
 		return true
 	}
 
 	// update last found object to add the value
-	wrapper, ok := chain[len(chain)-2].(map[string]interface{})
+	wrapper, ok := chain[len(chain)-1].(map[string]interface{})
 	if !ok { // impossible
 		return false
 	}
 
-	key := path[len(chain)-2]
-	wrapper[key] = root
-
+	// add each subkey
+	for subkey, subvalue := range root {
+		wrapper[subkey] = subvalue
+	}
 	return true
 
 }

internal/cnf/json_test.go

@@ -130,17 +130,18 @@ func TestSetPathExistsAndIsString(t *testing.T) {
 func TestSetCreatePath(t *testing.T) {
 
 	tests := []struct {
-		raw   string
-		key   string
-		value string
+		raw    string
+		key    string
+		ignore string // path to field that must be present after transformation
+		value  string
 	}{
-		{`{ }`, "key", "newvalue"},
-		{`{ }`, "parent.child", "newvalue"},
-		{`{ }`, "parent.child.subchild", "newvalue"},
+		{`{ "ignore": "xxx" }`, "key", "ignore", "newvalue"},
+		{`{ "ignore": "xxx" }`, "parent.child", "ignore", "newvalue"},
+		{`{ "ignore": "xxx" }`, "parent.child.subchild", "ignore", "newvalue"},
 
-		{`{ "ignore": "xxx" }`, "key", "newvalue"},
-		{`{ "parent": { } }`, "parent.child", "newvalue"},
-		{`{ "ignore": "xxx", "parent": { } }`, "parent.child", "newvalue"},
+		{`{ "ignore": "xxx" }`, "key", "ignore", "newvalue"},
+		{`{ "parent": { "ignore": "xxx" } }`, "parent.child", "parent.ignore", "newvalue"},
+		{`{ "ignore": "xxx", "parent": { } }`, "parent.child", "ignore", "newvalue"},
 	}
 
 	for i, test := range tests {
@@ -171,8 +172,21 @@ func TestSetCreatePath(t *testing.T) {
 		// check value
 		if value != test.value {
 			t.Errorf("[%d] expected '%s' got '%s'", i, test.value, value)
+			continue
 		}
 
+		// check that ignore field is still there
+		value, found = parser.Get(test.ignore)
+		if !found {
+			t.Errorf("[%d] expected ignore field, got none", i)
+			continue
+		}
+
+		// check value
+		if value != "xxx" {
+			t.Errorf("[%d] expected ignore value to be '%s' got '%s'", i, "xxx", value)
+			continue
+		}
 	}
 
 }