Add open_weather_map input plugin (#5125)

testutil/accumulator.go

@@ -320,6 +320,26 @@ func (a *Accumulator) WaitError(n int) {
 	a.Unlock()
 }
 
+func (a *Accumulator) assertContainsTaggedFields(
+	t *testing.T,
+	measurement string,
+	fields map[string]interface{},
+	tags map[string]string,
+) {
+	for _, p := range a.Metrics {
+		if !reflect.DeepEqual(tags, p.Tags) {
+			continue
+		}
+
+		if p.Measurement == measurement {
+			assert.Equal(t, fields, p.Fields)
+			return
+		}
+	}
+	msg := fmt.Sprintf("unknown measurement %s with tags %v", measurement, tags)
+	assert.Fail(t, msg)
+}
+
 func (a *Accumulator) AssertContainsTaggedFields(
 	t *testing.T,
 	measurement string,
@@ -333,13 +353,11 @@ func (a *Accumulator) AssertContainsTaggedFields(
 			continue
 		}
 
-		if p.Measurement == measurement {
-			assert.Equal(t, fields, p.Fields)
+		if p.Measurement == measurement && reflect.DeepEqual(fields, p.Fields) {
 			return
 		}
 	}
-	msg := fmt.Sprintf("unknown measurement %s with tags %v", measurement, tags)
-	assert.Fail(t, msg)
+	a.assertContainsTaggedFields(t, measurement, fields, tags)
 }
 
 func (a *Accumulator) AssertDoesNotContainsTaggedFields(