Remove spaces around :: module selection operator in spaceAroundOperators (#2402)

Co-authored-by: calda <1811727+calda@users.noreply.github.com>

Sources/Rules/SpaceAroundOperators.swift

@@ -44,6 +44,13 @@ public extension FormatRule {
                 {
                     formatter.insert(.space(" "), at: i + 1)
                 }
+            case .operator("::", _):
+                if formatter.token(at: i + 1)?.isSpace == true {
+                    formatter.removeToken(at: i + 1)
+                }
+                if formatter.token(at: i - 1)?.isSpace == true {
+                    formatter.removeToken(at: i - 1)
+                }
             case .operator(".", _):
                 if formatter.token(at: i + 1)?.isSpace == true {
                     formatter.removeToken(at: i + 1)

Tests/Rules/SpaceAroundOperatorsTests.swift

@@ -1170,4 +1170,28 @@ final class SpaceAroundOperatorsTests: XCTestCase {
             options: options
         )
     }
+
+    func testNoSpaceAroundDoubleColonOperator() {
+        let input = """
+        let x = Module::TypeName
+        """
+        testFormatting(for: input, rule: .spaceAroundOperators)
+    }
+
+    func testSpaceRemovedAroundDoubleColonOperator() {
+        let input = """
+        let x = Module :: TypeName
+        """
+        let output = """
+        let x = Module::TypeName
+        """
+        testFormatting(for: input, output, rule: .spaceAroundOperators)
+    }
+
+    func testNoSpaceAroundDoubleColonInMemberAccess() {
+        let input = """
+        let x = foo.Module::functionName()
+        """
+        testFormatting(for: input, rule: .spaceAroundOperators)
+    }
 }

Tests/Rules/WrapTests.swift

@@ -839,18 +839,12 @@ final class WrapTests: XCTestCase {
         let input = """
         NationalAeronauticsAndSpaceAdministration::RocketEngine
         """
-        // wrap-only output (no spaceAroundOperators)
         let output = """
         NationalAeronauticsAndSpaceAdministration
             ::RocketEngine
         """
-        // all-rules output (spaceAroundOperators adds space after ::)
-        let output2 = """
-        NationalAeronauticsAndSpaceAdministration
-            :: RocketEngine
-        """
         let options = FormatOptions(maxWidth: 50)
-        testFormatting(for: input, [output, output2], rules: [.wrap], options: options)
+        testFormatting(for: input, output, rule: .wrap, options: options)
     }
 
     func testWrapDoubleColonWithSpacesBreaksBeforeOperator() {
@@ -861,7 +855,11 @@ final class WrapTests: XCTestCase {
         NationalAeronauticsAndSpaceAdministration
             :: RocketEngine
         """
+        let output2 = """
+        NationalAeronauticsAndSpaceAdministration
+            ::RocketEngine
+        """
         let options = FormatOptions(maxWidth: 50)
-        testFormatting(for: input, output, rule: .wrap, options: options)
+        testFormatting(for: input, [output, output2], rules: [.wrap], options: options)
     }
 }