Provide a declared type for imported variable accesses to enable comp…

…letions (#12050)

Resolves #12049

The CompletionProvider always queries the *declared* type (rather than
the assigned type) of expressions when supplying completions. Since we
supply a declared type for variable accesses (even though variables have
no type declaration), it makes sense to do so for imported variables as
well.
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CodeFlow](https://microsoft.github.io/open-pr/?codeflow=https://github.com/Azure/bicep/pull/12050)

src/Bicep.Core/TypeSystem/DeclaredTypeManager.cs

@@ -964,9 +964,11 @@ private DeclaredTypeAssignment GetTestType(TestDeclarationSyntax syntax)
                     var variableType = this.typeManager.GetTypeInfo(variableSymbol.DeclaringVariable.Value);
                     return new DeclaredTypeAssignment(variableType, variableSymbol.DeclaringVariable);
 
-                case WildcardImportSymbol wildcardImportSymbol when IsCycleFree(wildcardImportSymbol):
-                    var wildcardImportType = this.typeManager.GetTypeInfo(wildcardImportSymbol.DeclaringSyntax);
-                    return new DeclaredTypeAssignment(wildcardImportType, declaringSyntax: null);
+                case ImportedSymbol importedSymbol when importedSymbol.Kind == SymbolKind.Variable:
+                    return new DeclaredTypeAssignment(importedSymbol.Type, declaringSyntax: null);
+
+                case WildcardImportSymbol wildcardImportSymbol:
+                    return new DeclaredTypeAssignment(wildcardImportSymbol.Type, declaringSyntax: null);
 
                 case DeclaredSymbol declaredSymbol when IsCycleFree(declaredSymbol):
                     // the syntax node is referencing a declared symbol

src/Bicep.LangServer.IntegrationTests/CompletionTests.cs

@@ -4443,5 +4443,65 @@ [new Uri("file:///mod2.bicep")] = mod2Content,
               completions.Should().Contain(c => c.Label == "mod2.buzz");
             }
         }
+
+        [TestMethod]
+        public async Task Compile_time_imports_offer_imported_symbol_property_completions()
+        {
+            var modContent = """
+              @export()
+              var foo = {
+                bar: 'bar'
+                baz: 'baz'
+              }
+              """;
+
+            var mod2Content = """
+              @export()
+              var fizz = {
+                buzz: 'buzz'
+                pop: 'pop'
+              }
+              """;
+
+            var mainContent = """
+              import {foo} from 'mod.bicep'
+              import {fizz} from 'mod2.bicep'
+
+              output obj object = {
+                bar: foo.|
+                pop: fizz.|
+              }
+              """;
+
+            var (text, cursors) = ParserHelper.GetFileWithCursors(mainContent, '|');
+            Uri mainUri = new Uri("file:///main.bicep");
+            var files = new Dictionary<Uri, string>
+            {
+                [new Uri("file:///mod.bicep")] = modContent,
+                [new Uri("file:///mod2.bicep")] = mod2Content,
+                [mainUri] = text
+            };
+
+            var bicepFile = SourceFileFactory.CreateBicepFile(mainUri, text);
+            using var helper = await LanguageServerHelper.StartServerWithText(
+                this.TestContext,
+                files,
+                bicepFile.FileUri,
+                services => services.WithFeatureOverrides(new(CompileTimeImportsEnabled: true)));
+
+            var file = new FileRequestHelper(helper.Client, bicepFile);
+
+            var completions = await file.RequestCompletion(cursors[0]);
+            completions.Should().Contain(c => c.Label == "bar");
+            completions.Should().Contain(c => c.Label == "baz");
+            completions.Should().NotContain(c => c.Label == "buzz");
+            completions.Should().NotContain(c => c.Label == "pop");
+
+            completions = await file.RequestCompletion(cursors[1]);
+            completions.Should().Contain(c => c.Label == "buzz");
+            completions.Should().Contain(c => c.Label == "pop");
+            completions.Should().NotContain(c => c.Label == "bar");
+            completions.Should().NotContain(c => c.Label == "baz");
+        }
     }
 }