[mat graph] fix some tests

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/UnitTests/PixelShaderNodeTests.cs

         public void TestNodeGeneratesCorrectNodeCode()
         {
             string expected = string.Format("half {0} = 0.2;" + Environment.NewLine
-                    + "o.Normal = {0};" + Environment.NewLine
+                    + "o.Normal = {0};" + Environment.NewLine
                     , m_InputOne.GetVariableNameForSlot(Vector1Node.OutputSlotId)
                     , m_Abs.GetVariableNameForSlot(Function1Input.OutputSlotId));
 

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/UnitTests/ShaderGeneratorTests.cs

         {
             var node = new TestNode();
             var result = ShaderGenerator.AdaptNodeOutputForPreview(node, TestNode.V1Out);
-            Assert.AreEqual(string.Format("({0})", node.GetVariableNameForSlot(TestNode.V1Out)), result);
+            Assert.AreEqual(string.Format("half4({0}, {0}, {0}, 1.0)", node.GetVariableNameForSlot(TestNode.V1Out)), result);
         }
         
         [Test]
-            var expected = string.Format("half4({0}.x, {0}.y, 0.0, 0.0)", node.GetVariableNameForSlot(TestNode.V2Out));
+            var expected = string.Format("half4({0}.x, {0}.y, 0.0, 1.0)", node.GetVariableNameForSlot(TestNode.V2Out));
             var result = ShaderGenerator.AdaptNodeOutputForPreview(node, TestNode.V2Out);
             Assert.AreEqual(expected, result);
         }
         {
             var node = new TestNode();
-            var expected = string.Format("half4({0}.x, {0}.y, {0}.z, 0.0)", node.GetVariableNameForSlot(TestNode.V3Out));
+            var expected = string.Format("half4({0}.x, {0}.y, {0}.z, 1.0)", node.GetVariableNameForSlot(TestNode.V3Out));
             var result = ShaderGenerator.AdaptNodeOutputForPreview(node, TestNode.V3Out);
             Assert.AreEqual(expected, result);
         }
         {
             var node = new TestNode();
+            var expected = string.Format("half4({0}.x, {0}.y, {0}.z, 1.0)", node.GetVariableNameForSlot(TestNode.V4Out));
-            Assert.AreEqual(string.Format("{0}", node.GetVariableNameForSlot(TestNode.V4Out)), result);
+            Assert.AreEqual(expected, result);
         }
     }
 }