Add emptyString()

Author: JavierSegoviaCordoba

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## [Unreleased]
 
 ### Added
+- `emptyString()`
 - `isNotNullNorBlank()` and `isNotNullNorEmpty()`
 - `second()`, `third()`, `forth()`, `fifth()` and `penultimate()`
 - `OrNull` variants for `second()`, `third()`, `forth()`, `fifth()` and `penultimate()`

kotlin-stdlib/api/kotlin-stdlib.api

@@ -157,6 +157,7 @@ public final class com/javiersc/kotlin/stdlib/CollectionsKt {
 }
 
 public final class com/javiersc/kotlin/stdlib/StringsKt {
+	public static final fun emptyString ()Ljava/lang/String;
 	public static final fun isNotNullNorBlank (Ljava/lang/CharSequence;)Z
 	public static final fun isNotNullNorBlank (Ljava/lang/String;)Z
 	public static final fun isNotNullNorEmpty (Ljava/lang/CharSequence;)Z

kotlin-stdlib/commonMain/kotlin/Strings.kt

@@ -36,3 +36,5 @@ public inline fun String?.isNotNullNorEmpty(): Boolean {
 
     return this != null && isNotEmpty()
 }
+
+public inline fun emptyString(): String = ""

kotlin-stdlib/commonTest/kotlin/StringsTest.kt

@@ -27,4 +27,9 @@ class StringsTest {
         assertTrue { notBlank.isNotNullNorBlank() }
         assertTrue { notBlank.isNotNullNorEmpty() }
     }
+
+    @Test
+    fun empty_string() {
+        assertTrue { emptyString() == "" }
+    }
 }