Fixes user defined function not found when used as parameter default …

docs/CHANGELOG-v1.md

@@ -42,6 +42,8 @@ See [upgrade notes][1] for helpful information when upgrading from previous vers
 - Bug fixes:
   - Fixed projection of default role authorization property `principalType` by @BernieWhite.
     [#3163](https://github.com/Azure/PSRule.Rules.Azure/issues/3163)
+  - Fixed user defined function not found when used as parameter default by @BernieWhite.
+    [#3169](https://github.com/Azure/PSRule.Rules.Azure/issues/3169)
 
 ## v1.40.0-B0063 (pre-release)
 

src/PSRule.Rules.Azure/Data/Template/TemplateVisitor.cs

@@ -906,12 +906,12 @@ protected virtual void Template(TemplateContext context, string deploymentName,
                 if (TryObjectProperty(template, PROPERTY_VARIABLES, out var variables))
                     FunctionVariables(context, variables);
 
-                if (TryObjectProperty(template, PROPERTY_PARAMETERS, out var parameters))
-                    Parameters(context, parameters);
-
                 if (TryArrayProperty(template, PROPERTY_FUNCTIONS, out var functions))
                     Functions(context, functions);
 
+                if (TryObjectProperty(template, PROPERTY_PARAMETERS, out var parameters))
+                    Parameters(context, parameters);
+
                 if (TryObjectProperty(template, PROPERTY_VARIABLES, out variables))
                     Variables(context, variables);
 

tests/PSRule.Rules.Azure.Tests/Bicep/UserDefinedFunctionTestCases/BicepUserDefinedFunctionTests.cs

@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
 
+using System.Linq;
 using Newtonsoft.Json.Linq;
 using PSRule.Rules.Azure.Data.Template;
 
@@ -31,4 +32,18 @@ public void ProcessTemplate_WhenUserDefinedFunctionReferencesExportedVariables_S
         Assert.True(templateContext.RootDeployment.TryOutput("o5", out JObject o5));
         Assert.Equal([3], o5["value"].Values<int>());
     }
+
+    /// <summary>
+    /// Test case for https://github.com/Azure/PSRule.Rules.Azure/issues/3169
+    /// </summary>
+    [Fact]
+    public void ProcessTemplate_WhenUserDefinedFunctionCalledAsParameterDefault_ShouldFindFunction()
+    {
+        var resources = ProcessTemplate(GetSourcePath("Bicep/UserDefinedFunctionTestCases/Tests.Bicep.2.json"), null, out var templateContext);
+
+        Assert.NotNull(resources);
+
+        var actual = resources.Where(r => r["type"].Value<string>() == "Microsoft.Storage/storageAccounts").FirstOrDefault();
+        Assert.Equal("sa5f3e65afb63bb1", actual["name"].Value<string>());
+    }
 }

tests/PSRule.Rules.Azure.Tests/Bicep/UserDefinedFunctionTestCases/Tests.Bicep.2.bicep

@@ -0,0 +1,12 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+// Test case for https://github.com/Azure/PSRule.Rules.Azure/issues/3169
+// Based on work contributed by @modbase
+
+targetScope = 'resourceGroup'
+
+module storage 'Tests.Bicep.2.child.bicep' = {
+  name: 'storage'
+  params: {}
+}

tests/PSRule.Rules.Azure.Tests/Bicep/UserDefinedFunctionTestCases/Tests.Bicep.2.child.bicep

@@ -0,0 +1,17 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+targetScope = 'resourceGroup'
+
+param name string = customNamingFunction('sa', 1)
+
+import { customNamingFunction } from './Tests.Bicep.2.fn.bicep'
+
+resource storage 'Microsoft.Storage/storageAccounts@2023-05-01' = {
+  name: name
+  location: resourceGroup().location
+  kind: 'StorageV2'
+  sku: {
+    name: 'Standard_LRS'
+  }
+}

tests/PSRule.Rules.Azure.Tests/Bicep/UserDefinedFunctionTestCases/Tests.Bicep.2.fn.bicep

@@ -0,0 +1,9 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+targetScope = 'resourceGroup'
+
+// A custom naming function.
+@export()
+func customNamingFunction(prefix string, instance int) string =>
+  '${prefix}${uniqueString(resourceGroup().id)}${instance}'

tests/PSRule.Rules.Azure.Tests/Bicep/UserDefinedFunctionTestCases/Tests.Bicep.2.json

@@ -0,0 +1,83 @@
+{
+  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
+  "contentVersion": "1.0.0.0",
+  "metadata": {
+    "_generator": {
+      "name": "bicep",
+      "version": "0.31.34.60546",
+      "templateHash": "6735599436485338599"
+    }
+  },
+  "resources": [
+    {
+      "type": "Microsoft.Resources/deployments",
+      "apiVersion": "2022-09-01",
+      "name": "storage",
+      "properties": {
+        "expressionEvaluationOptions": {
+          "scope": "inner"
+        },
+        "mode": "Incremental",
+        "parameters": {},
+        "template": {
+          "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
+          "languageVersion": "2.0",
+          "contentVersion": "1.0.0.0",
+          "metadata": {
+            "_generator": {
+              "name": "bicep",
+              "version": "0.31.34.60546",
+              "templateHash": "12715503820119808772"
+            }
+          },
+          "functions": [
+            {
+              "namespace": "__bicep",
+              "members": {
+                "customNamingFunction": {
+                  "parameters": [
+                    {
+                      "type": "string",
+                      "name": "prefix"
+                    },
+                    {
+                      "type": "int",
+                      "name": "instance"
+                    }
+                  ],
+                  "output": {
+                    "type": "string",
+                    "value": "[format('{0}{1}{2}', parameters('prefix'), uniqueString(resourceGroup().id), parameters('instance'))]"
+                  },
+                  "metadata": {
+                    "__bicep_imported_from!": {
+                      "sourceTemplate": "Tests.Bicep.2.fn.bicep"
+                    }
+                  }
+                }
+              }
+            }
+          ],
+          "parameters": {
+            "name": {
+              "type": "string",
+              "defaultValue": "[__bicep.customNamingFunction('sa', 1)]"
+            }
+          },
+          "resources": {
+            "storage": {
+              "type": "Microsoft.Storage/storageAccounts",
+              "apiVersion": "2023-05-01",
+              "name": "[parameters('name')]",
+              "location": "[resourceGroup().location]",
+              "kind": "StorageV2",
+              "sku": {
+                "name": "Standard_LRS"
+              }
+            }
+          }
+        }
+      }
+    }
+  ]
+}

tests/PSRule.Rules.Azure.Tests/PSRule.Rules.Azure.Tests.csproj

@@ -308,6 +308,9 @@
     <None Update="Bicep\UserDefinedFunctionTestCases\Tests.Bicep.1.json">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
+    <None Update="Bicep\UserDefinedFunctionTestCases\Tests.Bicep.2.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
     <None Update="Bicep\SymbolicNameTestCases\Tests.Bicep.3.json">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>