Add support for inferred named items (#1429)

Author: SimonCropp

docs/dates.md

@@ -289,6 +289,41 @@ public static void NamedDatesAndTimesGlobal()
 <!-- endSnippet -->
 
 
+### Inferred Name
+
+The name can be inferred from the variable name by omitting the name argument:
+
+<!-- snippet: InferredNamedDateFluent -->
+<a id='snippet-InferredNamedDateFluent'></a>
+```cs
+[Fact]
+public Task InferredNamedDateFluent()
+{
+    var namedDate = new Date(1935, 10, 1);
+    return Verify(
+            new
+            {
+                value = namedDate
+            })
+        .AddNamedDate(namedDate);
+}
+```
+<sup><a href='/src/Verify.Tests/DateScrubberTests.cs#L277-L291' title='Snippet source file'>snippet source</a> | <a href='#snippet-InferredNamedDateFluent' title='Start of snippet'>anchor</a></sup>
+<!-- endSnippet -->
+
+Result: 
+
+<!-- snippet: DateScrubberTests.InferredNamedDateFluent.verified.txt -->
+<a id='snippet-DateScrubberTests.InferredNamedDateFluent.verified.txt'></a>
+```txt
+{
+  value: namedDate
+}
+```
+<sup><a href='/src/Verify.Tests/DateScrubberTests.InferredNamedDateFluent.verified.txt#L1-L3' title='Snippet source file'>snippet source</a> | <a href='#snippet-DateScrubberTests.InferredNamedDateFluent.verified.txt' title='Start of snippet'>anchor</a></sup>
+<!-- endSnippet -->
+
+
 ## Custom Comparers
 
 The following comparers can be overridden

docs/guids.md

@@ -196,3 +196,38 @@ public static void Init() => VerifierSettings.AddNamedGuid(new("c8eeaf99-d5c4-43
 ```
 <sup><a href='/src/Verify.Tests/GuidScrubberTests.cs#L3-L8' title='Snippet source file'>snippet source</a> | <a href='#snippet-NamedGuidGlobal' title='Start of snippet'>anchor</a></sup>
 <!-- endSnippet -->
+
+
+### Inferred Name
+
+The name can be inferred from the variable name by omitting the name argument:
+
+<!-- snippet: InferredNamedGuidFluent -->
+<a id='snippet-InferredNamedGuidFluent'></a>
+```cs
+[Fact]
+public Task InferredNamedGuidFluent()
+{
+    var namedGuid = new Guid("c8eeaf99-d5c4-4341-8543-4597c3fd40d9");
+    return Verify(
+            new
+            {
+                value = namedGuid
+            })
+        .AddNamedGuid(namedGuid);
+}
+```
+<sup><a href='/src/Verify.Tests/GuidScrubberTests.cs#L107-L121' title='Snippet source file'>snippet source</a> | <a href='#snippet-InferredNamedGuidFluent' title='Start of snippet'>anchor</a></sup>
+<!-- endSnippet -->
+
+Result: 
+
+<!-- snippet: GuidScrubberTests.InferredNamedGuidFluent.verified.txt -->
+<a id='snippet-GuidScrubberTests.InferredNamedGuidFluent.verified.txt'></a>
+```txt
+{
+  value: namedGuid
+}
+```
+<sup><a href='/src/Verify.Tests/GuidScrubberTests.InferredNamedGuidFluent.verified.txt#L1-L3' title='Snippet source file'>snippet source</a> | <a href='#snippet-GuidScrubberTests.InferredNamedGuidFluent.verified.txt' title='Start of snippet'>anchor</a></sup>
+<!-- endSnippet -->

docs/mdsource/dates.source.md

@@ -93,6 +93,17 @@ snippet: NamedDatesAndTimesFluent
 snippet: NamedDatesAndTimesGlobal
 
 
+### Inferred Name
+
+The name can be inferred from the variable name by omitting the name argument:
+
+snippet: InferredNamedDateFluent
+
+Result: 
+
+snippet: DateScrubberTests.InferredNamedDateFluent.verified.txt
+
+
 ## Custom Comparers
 
 The following comparers can be overridden

docs/mdsource/guids.source.md

@@ -66,4 +66,15 @@ snippet: NamedGuidFluent
 
 ### Globally
 
-snippet: NamedGuidGlobal
+snippet: NamedGuidGlobal
+
+
+### Inferred Name
+
+The name can be inferred from the variable name by omitting the name argument:
+
+snippet: InferredNamedGuidFluent
+
+Result: 
+
+snippet: GuidScrubberTests.InferredNamedGuidFluent.verified.txt

src/Verify.Tests/DateScrubberTests.InferredNamedDateFluent.verified.txt

@@ -0,0 +1,3 @@
+{
+  value: namedDate
+}

src/Verify.Tests/DateScrubberTests.cs

@@ -274,6 +274,22 @@ public Task NamedDateFluent()
 
     #endregion
 
+    #region InferredNamedDateFluent
+
+    [Fact]
+    public Task InferredNamedDateFluent()
+    {
+        var namedDate = new Date(1935, 10, 1);
+        return Verify(
+                new
+                {
+                    value = namedDate
+                })
+            .AddNamedDate(namedDate);
+    }
+
+    #endregion
+
 #endif
 
     #region NamedDateTimeInstance

src/Verify.Tests/GuidScrubberTests.InferredNamedGuidFluent.verified.txt

@@ -0,0 +1,3 @@
+{
+  value: namedGuid
+}

src/Verify.Tests/GuidScrubberTests.cs

@@ -104,6 +104,22 @@ public Task NamedGuidFluent()
 
     #endregion
 
+    #region InferredNamedGuidFluent
+
+    [Fact]
+    public Task InferredNamedGuidFluent()
+    {
+        var namedGuid = new Guid("c8eeaf99-d5c4-4341-8543-4597c3fd40d9");
+        return Verify(
+                new
+                {
+                    value = namedGuid
+                })
+            .AddNamedGuid(namedGuid);
+    }
+
+    #endregion
+
     [Fact]
     public Task NamedGuidTopLevelFluent()
     {

src/Verify/Counter_SettingsTask.cs

@@ -5,14 +5,14 @@ public partial class SettingsTask
 #if NET6_0_OR_GREATER
 
     [Pure]
-    public SettingsTask AddNamedDate(Date value, string name)
+    public SettingsTask AddNamedDate(Date value, [CallerArgumentExpression(nameof(value))] string name = "")
     {
         CurrentSettings.AddNamedDate(value, name);
         return this;
     }
 
     [Pure]
-    public SettingsTask AddNamedTime(Time value, string name)
+    public SettingsTask AddNamedTime(Time value, [CallerArgumentExpression(nameof(value))] string name = "")
     {
         CurrentSettings.AddNamedTime(value, name);
         return this;
@@ -21,21 +21,21 @@ public SettingsTask AddNamedTime(Time value, string name)
 #endif
 
     [Pure]
-    public SettingsTask AddNamedDateTime(DateTime value, string name)
+    public SettingsTask AddNamedDateTime(DateTime value, [CallerArgumentExpression(nameof(value))] string name = "")
     {
         CurrentSettings.AddNamedDateTime(value, name);
         return this;
     }
 
     [Pure]
-    public SettingsTask AddNamedDateTimeOffset(DateTimeOffset value, string name)
+    public SettingsTask AddNamedDateTimeOffset(DateTimeOffset value, [CallerArgumentExpression(nameof(value))] string name = "")
     {
         CurrentSettings.AddNamedDateTimeOffset(value, name);
         return this;
     }
 
     [Pure]
-    public SettingsTask AddNamedGuid(Guid value, string name)
+    public SettingsTask AddNamedGuid(Guid value, [CallerArgumentExpression(nameof(value))] string name = "")
     {
         CurrentSettings.AddNamedGuid(value, name);
         return this;

src/Verify/Counter_VerifySettings.cs

@@ -6,28 +6,28 @@ public partial class VerifySettings
 
     internal Dictionary<Date, string> namedDates = [];
 
-    public void AddNamedDate(Date value, string name) =>
+    public void AddNamedDate(Date value, [CallerArgumentExpression(nameof(value))] string name = "") =>
         namedDates.Add(value, name);
 
     internal Dictionary<Time, string> namedTimes = [];
 
-    public void AddNamedTime(Time value, string name) =>
+    public void AddNamedTime(Time value, [CallerArgumentExpression(nameof(value))] string name = "") =>
         namedTimes.Add(value, name);
 
 #endif
 
     internal Dictionary<DateTime, string> namedDateTimes = [];
 
-    public void AddNamedDateTime(DateTime value, string name) =>
+    public void AddNamedDateTime(DateTime value, [CallerArgumentExpression(nameof(value))] string name = "") =>
         namedDateTimes.Add(value, name);
 
     internal Dictionary<Guid, string> namedGuids = [];
 
-    public void AddNamedGuid(Guid value, string name) =>
+    public void AddNamedGuid(Guid value, [CallerArgumentExpression(nameof(value))] string name = "") =>
         namedGuids.Add(value, name);
 
     internal Dictionary<DateTimeOffset, string> namedDateTimeOffsets = [];
 
-    public void AddNamedDateTimeOffset(DateTimeOffset value, string name) =>
+    public void AddNamedDateTimeOffset(DateTimeOffset value, [CallerArgumentExpression(nameof(value))] string name = "") =>
         namedDateTimeOffsets.Add(value, name);
 }