Fixes issue #1409 (#1412)

* Fixes issue #1409

Copy pasting into Currency locks the editor.
Skipping the validation of full editor lock when backspace or clear button is clicked.

* Adding code review feedback.

* Adding code review feedback.

src/CalculatorUITestFramework/UnitConverterOperatorsPanel.cs

@@ -0,0 +1,17 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+using OpenQA.Selenium.Appium.Windows;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace CalculatorUITestFramework
+{
+    public class UnitConverterOperatorsPanel
+    {
+        private WindowsDriver<WindowsElement> session => WinAppDriver.Instance.CalculatorSession;
+        public NumberPad NumberPad = new NumberPad();
+        public WindowsElement ClearButton => this.session.TryFindElementByAccessibilityId("ClearEntryButtonPos0");
+        public WindowsElement BackSpaceButton => this.session.TryFindElementByAccessibilityId("BackSpaceButtonSmall");
+    }
+}

src/CalculatorUITestFramework/UnitConverterPage.cs

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+using OpenQA.Selenium.Appium.Windows;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace CalculatorUITestFramework
+{
+    public class UnitConverterPage
+    {
+        public UnitConverterOperatorsPanel UnitConverterOperators = new UnitConverterOperatorsPanel();
+        public NavigationMenu NavigationMenu = new NavigationMenu();
+        public UnitConverterResults UnitConverterResults = new UnitConverterResults();
+
+        private WindowsDriver<WindowsElement> session => WinAppDriver.Instance.CalculatorSession;
+
+        /// <summary>
+        /// Clear the Calculator display
+        /// </summary>
+        public void ClearAll()
+        {
+            this.UnitConverterOperators.ClearButton.Click();
+        }
+
+        ///// <summary>
+        ///// Ensures that the calculator result text is zero; if not, clears all
+        ///// </summary>
+        public void EnsureCalculatorResultTextIsZero()
+        {
+            if ("0" != this.UnitConverterResults.GetCalculationResult1Text())
+            {
+                this.ClearAll();
+            }
+        }
+
+        /// <summary>
+        /// Navigates the calculator is in currency mode
+        /// </summary>
+        public void NavigateToUnitConverter()
+        {
+            // Ensure that calculator is in Currency Mode
+            this.NavigationMenu.ChangeCalculatorMode(CalculatorMode.Currency);
+            this.UnitConverterResults.IsResultsDisplayPresent();
+        }
+
+        ///// <summary>
+        ///// Ensures that the calculator is in Currency Mode
+        ///// </summary>
+        public void EnsureCalculatorIsCurrencyMode()
+        {
+            string source = WinAppDriver.Instance.CalculatorSession.PageSource;
+            if (source.Contains("Header"))
+            {
+                string header = CalculatorApp.Header.Text;
+                if (header == "Currency")
+                {
+                    return;
+                }
+                else
+                {
+                    this.NavigateToUnitConverter();
+                }
+            }
+        }
+
+    }
+}

src/CalculatorUITestFramework/UnitConverterResults.cs

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using OpenQA.Selenium.Appium.Windows;
+using System;
+using OpenQA.Selenium.Interactions;
+using System.Text.RegularExpressions;
+
+namespace CalculatorUITestFramework
+{
+    public class UnitConverterResults
+    {
+        private WindowsDriver<WindowsElement> session => WinAppDriver.Instance.CalculatorSession;
+        private WindowsElement CalculationResult1 => this.session.TryFindElementByAccessibilityId("Value1");
+
+        private WindowsElement CalculationResult2 => this.session.TryFindElementByAccessibilityId("Value2");
+
+        /// <summary>
+        /// Gets the text from the Value1 control and removes the narrator text that is not displayed in the UI.
+        /// </summary>
+        /// <returns>The string shown in the UI.</returns>
+        public string GetCalculationResult1Text()
+        {
+            return Regex.Replace(this.CalculationResult1.Text.Trim(), "[^0-9.]", "");
+        }
+
+        /// <summary>
+        /// Verifies that CalculationResult1 and CalculationResult2 are not null
+        /// </summary>
+        /// <returns>The string shown in the UI.</returns>
+        public void IsResultsDisplayPresent()
+        {
+            Assert.IsNotNull(this.CalculationResult1);
+            Assert.IsNotNull(this.CalculationResult2);
+        }
+
+        /// <summary>
+        /// Gets the text from the Value2 control and removes the narrator text that is not displayed in the UI.
+        /// </summary>
+        /// <returns>The string shown in the UI.</returns>
+        public string GetCalculationResult2Text()
+        {
+            return Regex.Replace(this.CalculationResult2.Text.Trim(), "[^0-9.]", "");
+        }
+
+    }
+}