Create own plurals subpackage

fix Typo

plurals/tests.go

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2018 DeineAgentur UG https://www.deineagentur.com. All rights reserved.
+ * Licensed under the MIT License. See LICENSE file in the project root for full license information.
+ */
+
+package plurals
+
+type equal struct {
+	value uint32
+}
+
+func (e equal) test(n uint32) bool {
+	return n == e.value
+}
+
+type notequal struct {
+	value uint32
+}
+
+func (e notequal) test(n uint32) bool {
+	return n != e.value
+}
+
+type gt struct {
+	value   uint32
+	flipped bool
+}
+
+func (e gt) test(n uint32) bool {
+	if e.flipped {
+		return e.value > n
+	} else {
+		return n > e.value
+	}
+}
+
+type lt struct {
+	value   uint32
+	flipped bool
+}
+
+func (e lt) test(n uint32) bool {
+	if e.flipped {
+		return e.value < n
+	} else {
+		return n < e.value
+	}
+}
+
+type gte struct {
+	value   uint32
+	flipped bool
+}
+
+func (e gte) test(n uint32) bool {
+	if e.flipped {
+		return e.value >= n
+	} else {
+		return n >= e.value
+	}
+}
+
+type lte struct {
+	value   uint32
+	flipped bool
+}
+
+func (e lte) test(n uint32) bool {
+	if e.flipped {
+		return e.value <= n
+	} else {
+		return n <= e.value
+	}
+}
+
+type and struct {
+	left  test
+	right test
+}
+
+func (e and) test(n uint32) bool {
+	if !e.left.test(n) {
+		return false
+	} else {
+		return e.right.test(n)
+	}
+}
+
+type or struct {
+	left  test
+	right test
+}
+
+func (e or) test(n uint32) bool {
+	if e.left.test(n) {
+		return true
+	} else {
+		return e.right.test(n)
+	}
+}
+
+type pipe struct {
+	modifier math
+	action   test
+}
+
+func (e pipe) test(n uint32) bool {
+	return e.action.test(e.modifier.calc(n))
+}