From 82b91ed4228f796a8f3fbdce433f1f945b80dabb Mon Sep 17 00:00:00 2001
From: Nikolay <46225163+vigdorov@users.noreply.github.com>
Date: Mon, 28 Dec 2020 10:33:04 +0300
Subject: [PATCH] =?UTF-8?q?=D0=94=D0=BE=D0=B1=D0=B0=D0=B2=D0=BB=D0=B5?=
 =?UTF-8?q?=D0=BD=D0=B8=D0=B5=20=D1=84=D1=83=D0=BD=D0=BA=D1=86=D0=B8=D0=B8?=
 =?UTF-8?q?=20toRequestParamValue=20(#32)?=
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---
 .../__test__/toRequestParamValue.test.ts      | 26 +++++++++++++++++++
 src/core/utils/toRequestParamValue.ts         |  7 +++++
 2 files changed, 33 insertions(+)
 create mode 100644 src/core/utils/__test__/toRequestParamValue.test.ts
 create mode 100644 src/core/utils/toRequestParamValue.ts

diff --git a/src/core/utils/__test__/toRequestParamValue.test.ts b/src/core/utils/__test__/toRequestParamValue.test.ts
new file mode 100644
index 0000000..47d2626
--- /dev/null
+++ b/src/core/utils/__test__/toRequestParamValue.test.ts
@@ -0,0 +1,26 @@
+import {toRequestParamValue} from '../toRequestParamValue';
+
+describe('toRequestParamValue', () => {
+    it('Возвращает простые значения', () => {
+        expect(toRequestParamValue('trt')).toBe('trt');
+        expect(toRequestParamValue(0)).toBe(0);
+        expect(toRequestParamValue(false)).toBe(false);
+    });
+
+    it('Простые пустые значения возвращают undefined', () => {
+        expect(toRequestParamValue('')).toBeUndefined();
+        expect(toRequestParamValue(null)).toBeUndefined();
+        expect(toRequestParamValue(undefined)).toBeUndefined();
+    });
+
+    it('Возвращает заполненные объекты', () => {
+        expect(toRequestParamValue({foo: undefined})).toMatchObject({foo: undefined});
+        expect(toRequestParamValue({foo: 'bar'})).toMatchObject({foo: 'bar'});
+        expect(toRequestParamValue(['rtt'])).toEqual(['rtt']);
+    });
+
+    it('Пустые объекты возвращают undefined', () => {
+        expect(toRequestParamValue({})).toBeUndefined();
+        expect(toRequestParamValue([])).toBeUndefined();
+    });
+});
diff --git a/src/core/utils/toRequestParamValue.ts b/src/core/utils/toRequestParamValue.ts
new file mode 100644
index 0000000..f140aad
--- /dev/null
+++ b/src/core/utils/toRequestParamValue.ts
@@ -0,0 +1,7 @@
+import {isNotEmpty} from '../referers/common';
+
+export function toRequestParamValue<T>(val: T): T;
+export function toRequestParamValue<T>(val?: T): Undefinable<T>;
+export function toRequestParamValue<T>(val?: T) {
+    return isNotEmpty(val) ? val : undefined;
+}