Add unit tests for optional string + isNilOrEmpty.

Author: jaclync

WooCommerce/WooCommerce.xcodeproj/project.pbxproj

@@ -128,6 +128,7 @@
 		024DF32123744798006658FE /* AztecFormatBarCommandCoordinator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 024DF32023744798006658FE /* AztecFormatBarCommandCoordinator.swift */; };
 		024EFA6923FCC10B00F36918 /* Product+Media.swift in Sources */ = {isa = PBXBuildFile; fileRef = 024EFA6823FCC10B00F36918 /* Product+Media.swift */; };
 		02521E11243DC3C400DC7810 /* CancellableMedia.swift in Sources */ = {isa = PBXBuildFile; fileRef = 02521E10243DC3C400DC7810 /* CancellableMedia.swift */; };
+		02564A88246C047C00D6DB2A /* Optional+StringTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 02564A87246C047C00D6DB2A /* Optional+StringTests.swift */; };
 		0257285C230ACC7E00A288C4 /* StoreStatsV4ChartAxisHelperTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0257285B230ACC7E00A288C4 /* StoreStatsV4ChartAxisHelperTests.swift */; };
 		025B1748237A92D800C780B4 /* ProductFormSection+ReusableTableRow.swift in Sources */ = {isa = PBXBuildFile; fileRef = 025B1747237A92D800C780B4 /* ProductFormSection+ReusableTableRow.swift */; };
 		025B174A237AA49D00C780B4 /* Product+ProductForm.swift in Sources */ = {isa = PBXBuildFile; fileRef = 025B1749237AA49D00C780B4 /* Product+ProductForm.swift */; };
@@ -966,6 +967,7 @@
 		024DF32023744798006658FE /* AztecFormatBarCommandCoordinator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AztecFormatBarCommandCoordinator.swift; sourceTree = "<group>"; };
 		024EFA6823FCC10B00F36918 /* Product+Media.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Product+Media.swift"; sourceTree = "<group>"; };
 		02521E10243DC3C400DC7810 /* CancellableMedia.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CancellableMedia.swift; sourceTree = "<group>"; };
+		02564A87246C047C00D6DB2A /* Optional+StringTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Optional+StringTests.swift"; sourceTree = "<group>"; };
 		0257285B230ACC7E00A288C4 /* StoreStatsV4ChartAxisHelperTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StoreStatsV4ChartAxisHelperTests.swift; sourceTree = "<group>"; };
 		025B1747237A92D800C780B4 /* ProductFormSection+ReusableTableRow.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "ProductFormSection+ReusableTableRow.swift"; sourceTree = "<group>"; };
 		025B1749237AA49D00C780B4 /* Product+ProductForm.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Product+ProductForm.swift"; sourceTree = "<group>"; };
@@ -2968,6 +2970,7 @@
 				0215320C2423309B003F2BBD /* UIStackView+SubviewsTests.swift */,
 				6856D7981E11F85D5E4EFED7 /* NSMutableAttributedStringHelperTests.swift */,
 				5761298A24589B84007BB2D9 /* NumberFormatter+LocalizedOrNinetyNinePlusTests.swift */,
+				02564A87246C047C00D6DB2A /* Optional+StringTests.swift */,
 			);
 			path = Extensions;
 			sourceTree = "<group>";
@@ -4941,6 +4944,7 @@
 				0247AAA223A3C5A6007F967E /* DecimalInputFormatterTests.swift in Sources */,
 				B509FED521C052D1000076A9 /* MockupSupportManager.swift in Sources */,
 				02691782232605B9002AFC20 /* PaginatedListViewControllerStateCoordinatorTests.swift in Sources */,
+				02564A88246C047C00D6DB2A /* Optional+StringTests.swift in Sources */,
 				0269576D23726401001BA0BF /* KeyboardFrameObserverTests.swift in Sources */,
 				0215320D2423309B003F2BBD /* UIStackView+SubviewsTests.swift in Sources */,
 				027B8BBD23FE0DE10040944E /* ProductImageActionHandlerTests.swift in Sources */,

WooCommerce/WooCommerceTests/Extensions/Optional+StringTests.swift

@@ -0,0 +1,21 @@
+import XCTest
+@testable import WooCommerce
+
+final class Optional_StringTests: XCTestCase {
+    // MARK: - `isNilOrEmpty`
+
+    func testNilStringReturnsTrueForNilOrEmpty() {
+        let string: String? = nil
+        XCTAssertTrue(string.isNilOrEmpty)
+    }
+
+    func testEmptyStringReturnsTrueForNilOrEmpty() {
+        let string: String? = ""
+        XCTAssertTrue(string.isNilOrEmpty)
+    }
+
+    func testNonEmptyStringReturnsFalseForNilOrEmpty() {
+        let string: String? = "🤓"
+        XCTAssertFalse(string.isNilOrEmpty)
+    }
+}