Test for added animal; minor fixes

03_Animal/vbnet/Animal.Tests/EndOfInputsException.vb

@@ -0,0 +1,7 @@
+''' <summary>
+''' <para>Indicates that there are no more inputs in the MockConsole.</para>
+''' We need this while testing, because otherwise the game loop will continue forever, waiting for a nonexistent input.
+''' </summary>
+Public Class EndOfInputsException
+    Inherits Exception
+End Class

03_Animal/vbnet/Animal.Tests/MockConsole.vb

@@ -37,26 +37,21 @@ Public Class MockConsole
         WriteString(value?.ToString)
     End Sub
 
-    Public Overrides Sub WriteLine(value As Object)
-        WriteString(value?.ToString)
-        WriteLine()
-    End Sub
-
     Public Overrides Sub WriteLine()
         Lines.Add(("", False))
     End Sub
 
-    Public Overrides Sub WriteCenteredLine(value As Object)
+    Public Overrides Sub WriteCenteredLines(value As Object)
         If Lines.Count = 0 Then Lines.Add(("", False))
         Dim currentLast = Lines(Lines.Count - 1).line
-        If currentLast.Length > 0 Then Throw New InvalidOperationException("Can only write centered line if cursor is at start of line.")
+        If currentLast.Length > 0 Then Lines.Add(("", False))
         WriteString(value?.ToString, True)
         WriteLine()
     End Sub
 
     Public Overrides Function ReadLine() As String
         ' Indicates the end of a test run, for programs which loop endlessly
-        If inputs.Count = 0 Then Throw New EndOfStreamException("End of inputs")
+        If inputs.Count = 0 Then Throw New EndOfInputsException
 
         Dim nextInput = inputs.Dequeue.Trim
         WriteLine(nextInput)

03_Animal/vbnet/Animal.Tests/TestContainer.vb

@@ -36,7 +36,7 @@ Public Class TestContainer
     Sub List(listResponse As String)
         Dim console As New MockConsole({listResponse})
         Dim game As New Game(console)
-        Assert.Throws(Of EndOfStreamException)(Sub() game.BeginLoop())
+        Assert.Throws(Of EndOfInputsException)(Sub() game.BeginLoop())
         Assert.Equal(
             {
                 "ANIMALS I ALREADY KNOW ARE:",
@@ -52,7 +52,7 @@ Public Class TestContainer
     Sub YesVariant(yesVariant As String)
         Dim console As New MockConsole({yesVariant})
         Dim game As New Game(console)
-        Assert.Throws(Of EndOfStreamException)(Sub() game.BeginLoop())
+        Assert.Throws(Of EndOfInputsException)(Sub() game.BeginLoop())
         Assert.Equal(
             {
                 $"ARE YOU THINKING OF AN ANIMAL? {yesVariant}",
@@ -68,7 +68,7 @@ Public Class TestContainer
     Sub NoVariant(noVariant As String)
         Dim console As New MockConsole({"y", noVariant})
         Dim game As New Game(console)
-        Assert.Throws(Of EndOfStreamException)(Sub() game.BeginLoop())
+        Assert.Throws(Of EndOfInputsException)(Sub() game.BeginLoop())
         Assert.Equal(
             {
                 $"DOES IT SWIM? {noVariant}",
@@ -77,4 +77,42 @@ Public Class TestContainer
             console.Lines.Slice(-2, 0).Select(Function(x) x.line)
         )
     End Sub
+
+    ''' <summary>Test adding a new animal and using the new animal in the game</summary>
+    <Fact>
+    Sub TestAddedAnimal()
+        Dim console As New MockConsole({
+            "y",
+            "y",
+            "n",
+            "whale",
+            "is it a mammal?",
+            "y",
+            "y",
+            "y",
+            "y",
+            "y"
+        })
+        Dim game As New Game(console)
+        Assert.Throws(Of EndOfInputsException)(Sub() game.BeginLoop())
+        Assert.Equal(
+            {
+                "ARE YOU THINKING OF AN ANIMAL? y",
+                "DOES IT SWIM? y",
+                "IS IT A FISH? n",
+                "THE ANIMAL YOU WERE THINKING OF WAS A ? whale",
+                "PLEASE TYPE IN A QUESTION THAT WOULD DISTINGUISH A",
+                "WHALE FROM A FISH",
+                "is it a mammal?",
+                "FOR A WHALE THE ANSWER WOULD BE? y",
+                "ARE YOU THINKING OF AN ANIMAL? y",
+                "DOES IT SWIM? y",
+                "IS IT A MAMMAL? y",
+                "IS IT A WHALE? y",
+                "WHY NOT TRY ANOTHER ANIMAL?",
+                "ARE YOU THINKING OF AN ANIMAL? "
+            },
+            console.Lines.Slice(9, 100).Select(Function(x) x.line)
+        )
+    End Sub
 End Class

03_Animal/vbnet/Animal/Game.vb

@@ -46,8 +46,11 @@ Public Class Game
 
     Sub BeginLoop()
         ' Print the program heading
-        console.WriteCenteredLine("ANIMAL")
-        console.WriteCenteredLine("CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY")
+        console.WriteCenteredLines(
+"ANIMAL
+CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY")
+
+        ' Print the program description
         console.Write(
 "
 
@@ -64,9 +67,10 @@ THINK OF AN ANIMAL AND THE COMPUTER WILL TRY TO GUESS IT.
             Dim response = console.ReadLine
             If response = "list" Then
                 ' List all the stored animals
-                console.WriteLine(
+                console.Write(
 "
-ANIMALS I ALREADY KNOW ARE:")
+ANIMALS I ALREADY KNOW ARE:
+")
 
                 ' We're using a ForEach extension method instead of the regular For Each loop to provide the index alongside the text
                 root.DescendantTexts.ForEach(Sub(text, index)
@@ -76,8 +80,9 @@ ANIMALS I ALREADY KNOW ARE:")
                                                  If index > 0 AndAlso index Mod 4 = 0 Then console.WriteLine()
                                                  console.Write($"{text.MaxLength(15),-15}")
                                              End Sub)
-                console.WriteLine(
+                console.Write(
 "
+
 ")
                 Continue Do
             End If
@@ -105,25 +110,26 @@ ANIMALS I ALREADY KNOW ARE:")
             ' Now we're at an end branch
             console.Write($"IS IT A {currentBranch.Text}? ")
             ynResponse = GetYesNo()
-            If ynResponse Then ' Only if ynResponse = True will we go into this If Then
+            If ynResponse Then ' Only if ynResponse = True will we go into this If Then block
+                ' The computer guessed the animal; we can go back to the beginning of the game
                 console.WriteLine("WHY NOT TRY ANOTHER ANIMAL?")
                 Continue Do
             End If
 
-            ' Get the new animal
+            ' Get the new animal from the user
             console.Write("THE ANIMAL YOU WERE THINKING OF WAS A ? ")
-            Dim newAnimal = console.ReadLine
+            Dim newAnimal = console.ReadLine.ToUpperInvariant
 
             ' Get the question used to distinguish the new animal from the current end branch
-            console.WriteLine(
-$"PLEASE TYPE IN A QUESTION THAT WOULD DISTINGUISH A 
-{newAnimal} FROM A {currentBranch.Text}")
-            Dim newQuestion = console.ReadLine
+            console.Write(
+$"PLEASE TYPE IN A QUESTION THAT WOULD DISTINGUISH A
+{newAnimal} FROM A {currentBranch.Text}
+")
+            Dim newQuestion = console.ReadLine.ToUpperInvariant
 
             ' Get the answer to that question, for the new animal
-            ' for the old animal, the answer would be the opposite
-            console.Write(
-$"FOR A {newAnimal} THE ANSWER WOULD BE ? ")
+            ' for the old animal, the answer will be the opposite
+            console.Write($"FOR A {newAnimal} THE ANSWER WOULD BE? ")
             Do
                 ynResponse = GetYesNo()
             Loop While ynResponse Is Nothing

03_Animal/vbnet/Animal/Shared/ConsoleAdapter.vb

@@ -5,18 +5,15 @@
         Console.Write(value)
     End Sub
 
-    Public Overrides Sub WriteLine(value As Object)
-        Console.WriteLine(value)
-    End Sub
-
     Public Overrides Sub WriteLine()
         Console.WriteLine()
     End Sub
 
-    Public Overrides Sub WriteCenteredLine(value As Object)
-        If Console.CursorLeft <> 0 Then Throw New InvalidOperationException("Can only write centered line if cursor is at start of line.")
+    Public Overrides Sub WriteCenteredLines(value As Object)
+        If Console.CursorLeft <> 0 Then WriteLine()
         Dim toWrite = If(value?.ToString, "")
-        Console.WriteLine($"{Space((Console.WindowWidth - toWrite.Length) \ 2)}{toWrite}")
+        Write($"{Space((Console.WindowWidth - toWrite.Length) \ 2)}{toWrite}")
+        WriteLine()
     End Sub
 
     Public Overrides Function ReadLine() As String

03_Animal/vbnet/Animal/Shared/ConsoleAdapterBase.vb

@@ -1,9 +1,13 @@
 Public MustInherit Class ConsoleAdapterBase
     Public MustOverride Sub Write(value As Object)
-    Public MustOverride Sub WriteLine(value As Object)
     Public MustOverride Sub WriteLine()
-    Public MustOverride Sub WriteCenteredLine(value As Object)
+    Public MustOverride Sub WriteCenteredLines(value As Object)
 
     ''' <summary>Implementations should always return a String without leading or trailing whitespace, never Nothng</summary>
     Public MustOverride Function ReadLine() As String
+
+    Public Sub WriteLine(value As Object)
+        Write(value)
+        WriteLine()
+    End Sub
 End Class

03_Animal/vbnet/README.md

@@ -1,3 +1,9 @@
 Original BASIC source [downloaded from Vintage Basic](http://www.vintage-basic.net/games.html)
 
 Conversion to [Visual Basic .NET](https://en.wikipedia.org/wiki/Visual_Basic_.NET)
+
+This takes some inspiration from the [C# port of Animal](https://github.com/zspitz/basic-computer-games/tree/main/03_Animal/csharp).
+
+The `Game` class takes a console abstraction (`ConsoleAdapterBase`), which could also be used for different UIs, such as WinForms or a web page.  
+This solution also has an xUnit tests project.  
+Responses can be entered in any capitalization, but animals and the distinguishing question will be converted to uppercase.