Fix conversion from string float to integer (#5518)

plugins/processors/converter/converter_test.go

@@ -129,8 +129,8 @@ func TestConverter(t *testing.T) {
 			converter: &Converter{
 				Fields: &Conversion{
 					String:   []string{"a"},
-					Integer:  []string{"b"},
-					Unsigned: []string{"c"},
+					Integer:  []string{"b", "b1", "b2"},
+					Unsigned: []string{"c", "c1", "c2"},
 					Boolean:  []string{"d"},
 					Float:    []string{"e"},
 					Tag:      []string{"f"},
@@ -141,12 +141,16 @@ func TestConverter(t *testing.T) {
 					"cpu",
 					map[string]string{},
 					map[string]interface{}{
-						"a": "howdy",
-						"b": "42",
-						"c": "42",
-						"d": "true",
-						"e": "42.0",
-						"f": "foo",
+						"a":  "howdy",
+						"b":  "42",
+						"b1": "42.2",
+						"b2": "42.5",
+						"c":  "42",
+						"c1": "42.2",
+						"c2": "42.5",
+						"d":  "true",
+						"e":  "42.0",
+						"f":  "foo",
 					},
 					time.Unix(0, 0),
 				),
@@ -158,11 +162,15 @@ func TestConverter(t *testing.T) {
 						"f": "foo",
 					},
 					map[string]interface{}{
-						"a": "howdy",
-						"b": int64(42),
-						"c": uint64(42),
-						"d": true,
-						"e": 42.0,
+						"a":  "howdy",
+						"b":  int64(42),
+						"b1": int64(42),
+						"b2": int64(43),
+						"c":  uint64(42),
+						"c1": uint64(42),
+						"c2": uint64(43),
+						"d":  true,
+						"e":  42.0,
 					},
 					time.Unix(0, 0),
 				),