feat: Working on node builder

Tests/CliDocTests/CliDocTests.swift

@@ -13,10 +13,9 @@ final class CliDocTests: XCTestCase {
 
   func testStringChecks() {
     let expected = "Foo".green.bold
-    let notexpected = "Foo"
 
     XCTAssert("Foo".green.bold == expected)
-    XCTAssert("Foo".green.bold != notexpected)
+    XCTAssert(expected != "Foo")
   }
 
   func testRepeatingModifier() {
@@ -96,4 +95,35 @@ final class CliDocTests: XCTestCase {
     """
     XCTAssert(node.render() == expected)
   }
+
+  func testShellCommand() {
+    let node = ShellCommand {
+      "ls -lah"
+    }
+    let expected = "  $ ls -lah"
+    XCTAssert(node.render() == expected)
+  }
+
+  func testDiscussion() {
+    let node = Discussion {
+      Group(separator: "\n") {
+        LabeledContent(separator: " ") {
+          "NOTE:".yellow.bold
+        } content: {
+          "Foo"
+        }
+      }
+    }
+
+    let expected = """
+    \("NOTE:".yellow.bold) Foo
+    """
+
+    XCTAssert(node.render() == expected)
+  }
+
+  func testFooNode() {
+    let foo = Foo()
+    XCTAssertNotNil(foo.body as? LabeledContent)
+  }
 }