tests from: Fix parsed decimal losing trailing zeroes JamesNK/Newtons…

…oft.Json#2769

src/Tests/Issues/Issue2768.cs

@@ -0,0 +1,156 @@
+// Copyright (c) 2007 James Newton-King. All rights reserved.
+// Use of this source code is governed by The MIT License,
+// as found in the license.md file.
+
+public class Issue2768 : TestFixtureBase
+{
+    [Fact]
+    public void Test_Serialize()
+    {
+        var d = 0.0m;
+        var json = JsonConvert.SerializeObject(d);
+
+        Assert.Equal("0.0", json);
+    }
+
+    [Fact]
+    public void Test_Serialize_NoTrailingZero()
+    {
+        var d = 0m;
+        var json = JsonConvert.SerializeObject(d);
+
+        Assert.Equal("0.0", json);
+    }
+
+    [Fact]
+    public void Test_Deserialize()
+    {
+        var d = JsonConvert.DeserializeObject<decimal>("0.0");
+
+        Assert.Equal("0.0", d.ToString());
+    }
+
+    [Fact]
+    public void Test_Deserialize_Negative()
+    {
+        decimal d = JsonConvert.DeserializeObject<decimal>("-0.0");
+
+        Assert.Equal("0.0", d.ToString());
+    }
+
+    [Fact]
+    public void Test_Deserialize_NegativeNoTrailingZero()
+    {
+        var d = JsonConvert.DeserializeObject<decimal>("-0");
+
+        Assert.Equal("0", d.ToString());
+    }
+
+    [Fact]
+    public void Test_Deserialize_MultipleTrailingZeroes()
+    {
+        var d = JsonConvert.DeserializeObject<decimal>("0.00");
+
+        Assert.Equal("0.00", d.ToString());
+    }
+
+    [Fact]
+    public void Test_Deserialize_NoTrailingZero()
+    {
+        var d = JsonConvert.DeserializeObject<decimal>("0");
+
+        Assert.Equal("0", d.ToString());
+    }
+
+    [Fact]
+    public void ParseJsonDecimal()
+    {
+        var json = @"{ ""property"": 0.0 }";
+
+        var reader = new JsonTextReader(new StringReader(json))
+        {
+            FloatParseHandling = FloatParseHandling.Decimal
+        };
+
+        decimal? parsedValue = null;
+
+        while (reader.Read())
+        {
+            if (reader.TokenType == JsonToken.Float)
+            {
+                parsedValue = (decimal) reader.Value;
+                break;
+            }
+        }
+
+        Assert.Equal("0.0", parsedValue.ToString());
+    }
+
+    [Fact]
+    public void ParseJsonDecimal_IsBoxedInstanceSame()
+    {
+        var json = @"[ 0.0, 0.0 ]";
+
+        var reader = new JsonTextReader(new StringReader(json))
+        {
+            FloatParseHandling = FloatParseHandling.Decimal
+        };
+
+        var boxedDecimals = new List<object>();
+
+        // Start array
+        Assert.True(reader.Read());
+
+        Assert.True(reader.Read());
+        boxedDecimals.Add(reader.Value);
+
+        Assert.True(reader.Read());
+        boxedDecimals.Add(reader.Value);
+
+        Assert.True(reader.Read());
+        Assert.False(reader.Read());
+
+        // Boxed values will match or not depending on whether framework supports.
+#if NET6_0_OR_GREATER
+        Assert.True(ReferenceEquals(boxedDecimals[0], boxedDecimals[1]));
+#else
+        Assert.False(ReferenceEquals(boxedDecimals[0], boxedDecimals[1]));
+#endif
+    }
+
+    [Fact]
+    public void Test_Deserialize_Double_Negative()
+    {
+        var d = JsonConvert.DeserializeObject<double>("-0.0");
+
+#if NETCOREAPP3_1_OR_GREATER
+        Assert.Equal("-0", d.ToString());
+#else
+        Assert.Equal("0", d.ToString());
+#endif
+    }
+
+    [Fact]
+    public void Test_Deserialize_Double_NegativeNoTrailingZero()
+    {
+        var d = JsonConvert.DeserializeObject<double>("-0");
+
+#if NETCOREAPP3_1_OR_GREATER
+        Assert.Equal("-0", d.ToString());
+#else
+        Assert.Equal("0", d.ToString());
+#endif
+    }
+
+    [Fact]
+    public void JValueDouble_ToString()
+    {
+        var d = new JValue(-0.0d);
+
+#if NETCOREAPP3_1_OR_GREATER
+        Assert.Equal("-0", d.ToString());
+#else
+        Assert.Equal("0", d.ToString());
+#endif
+    }
+}