(GH-2328) Add support for /severity argument for InspectCode tool

src/Cake.Common.Tests/Unit/Tools/InspectCode/InspectCodeRunnerTests.cs

@@ -317,6 +317,20 @@ public void Should_Set_Verbosity()
                 // Then
                 Assert.Equal("\"/verbosity=ERROR\" \"/Working/Test.sln\"", result.Args);
             }
+
+            [Fact]
+            public void Should_Set_Severity()
+            {
+                // Given
+                var fixture = new InspectCodeRunFixture();
+                fixture.Settings.Severity = InspectCodeSeverity.Hint;
+
+                // When
+                var result = fixture.Run();
+
+                // Then
+                Assert.Equal("\"/severity=HINT\" \"/Working/Test.sln\"", result.Args);
+            }
         }
 
         public sealed class TheRunFromConfigMethod

src/Cake.Common/Tools/InspectCode/InspectCodeRunner.cs

@@ -200,6 +200,11 @@ private ProcessArgumentBuilder GetArguments(InspectCodeSettings settings, FilePa
                 builder.AppendQuoted(string.Format(CultureInfo.InvariantCulture, "/verbosity={0}", settings.Verbosity.ToString().ToUpper(CultureInfo.InvariantCulture)));
             }
 
+            if (settings.Severity != null)
+            {
+                builder.AppendQuoted(string.Format(CultureInfo.InvariantCulture, "/severity={0}", settings.Severity.ToString().ToUpper(CultureInfo.InvariantCulture)));
+            }
+
             builder.AppendQuoted(solution.MakeAbsolute(_environment).FullPath);
 
             return builder;

src/Cake.Common/Tools/InspectCode/InspectCodeSettings.cs

@@ -109,5 +109,10 @@ public sealed class InspectCodeSettings : ToolSettings
         /// Gets or sets the verbosity level of the log messages.
         /// </summary>
         public InspectCodeVerbosity? Verbosity { get; set; }
+
+        /// <summary>
+        /// Gets or sets the minimal severity of issues to report.
+        /// </summary>
+        public InspectCodeSeverity? Severity { get; set; }
     }
 }

src/Cake.Common/Tools/InspectCode/InspectCodeSeverity.cs

@@ -0,0 +1,33 @@
+namespace Cake.Common.Tools.InspectCode
+{
+    /// <summary>
+    /// Represents InspectCode's minimal severity report.
+    /// </summary>
+    public enum InspectCodeSeverity
+    {
+        /// <summary>
+        /// Severity: INFO.
+        /// </summary>
+        Info = 1,
+
+        /// <summary>
+        /// Severity: HINT.
+        /// </summary>
+        Hint = 2,
+
+        /// <summary>
+        /// Severity: SUGGESTION.
+        /// </summary>
+        Suggestion = 3,
+
+        /// <summary>
+        /// Severity: WARNING.
+        /// </summary>
+        Warning = 4,
+
+        /// <summary>
+        /// Severity: ERROR.
+        /// </summary>
+        Error = 5
+    }
+}