Add code style validation step in CI build

.github/workflows/ci_build.yml

@@ -2,24 +2,41 @@ name: CI
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Setup .NET
-      uses: actions/setup-dotnet@v1
-      with:
-        dotnet-version: 5.0.x
-    - name: Restore dependencies
-      run: dotnet restore
-    - name: Build
-      run: dotnet build --no-restore
-    - name: Test
-      run: dotnet test --no-build --verbosity normal
+      - uses: actions/checkout@v2
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v1
+        with:
+          dotnet-version: 5.0.x
+
+      - name: Restore dependencies
+        run: dotnet restore
+
+      # Format the output of dotnet format
+      - name: Add dotnet-format problem matcher
+        uses: xt0rted/dotnet-format-problem-matcher@v1
+
+      # Install dotnet format as a global tool
+      - name: Install dotnet format
+        run: dotnet tool update --global dotnet-format
+
+      # Run dotnet format --dry-run --check
+      # By default, the task ensure the exit code is 0
+      # If a file needs to be edited by dotnet format, the exit code will be a non-zero value
+      # So the task will fail
+      - name: Run dotnet format
+        run: dotnet format --check --verbosity diagnostic
+
+      - name: Build
+        run: dotnet build --no-restore
+
+      - name: Test
+        run: dotnet test --no-build --verbosity normal

Src/Notion.Client/Extensions/EnumExtensions.cs

@@ -1,4 +1,4 @@
-using System.Linq;
+using System.Linq;
 using System.Runtime.Serialization;
 
 namespace Notion.Client.Extensions
@@ -19,4 +19,4 @@ public static string GetEnumMemberValue<T>(this T enumValue) where T : System.En
             return null;
         }
     }
-}
+}