Add InDeltaSlice.

assert/assertions.go

@@ -667,6 +667,25 @@ func InDelta(t TestingT, expected, actual interface{}, delta float64, msgAndArgs
 	return true
 }
 
+func InDeltaSlice(t TestingT, expected, actual interface{}, delta float64, msgAndArgs ...interface{}) bool {
+	if reflect.TypeOf(actual).Kind() != reflect.Slice ||
+		reflect.TypeOf(expected).Kind() != reflect.Slice {
+		return Fail(t, fmt.Sprintf("Parameters must be slice"), msgAndArgs...)
+	}
+
+	actualSlice := reflect.ValueOf(actual)
+	expectedSlice := reflect.ValueOf(expected)
+
+	for i := 0; i < actualSlice.Len(); i++ {
+		result := InDelta(t, actualSlice.Index(i).Interface(), expectedSlice.Index(i).Interface(), delta)
+		if !result {
+			return result
+		}
+	}
+
+	return true
+}
+
 // min(|expected|, |actual|) * epsilon
 func calcEpsilonDelta(expected, actual interface{}, epsilon float64) float64 {
 	af, aok := toFloat(expected)