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ArmTemplateSemanticModelTests.cs
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ArmTemplateSemanticModelTests.cs
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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using Bicep.Core.Semantics;
using Bicep.Core.TypeSystem;
using Bicep.Core.TypeSystem.Types;
using Bicep.Core.Workspaces;
using FluentAssertions;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace Bicep.Core.UnitTests.Semantics;
[TestClass]
public class ArmTemplateSemanticModelTests
{
[TestMethod]
public void Model_creates_object_from_properties_constraint()
{
var parameterType = GetLoadedParameterType(@"{
""$schema"": ""https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#"",
""contentVersion"": ""1.0.0.0"",
""languageVersion"": ""2.0"",
""resources"": {},
""parameters"": {
""objectParameter"": {
""type"": ""object"",
""properties"": {
""foo"": { ""type"": ""string"" },
""bar"": { ""type"": ""int"" },
""baz"": { ""type"": ""bool"" }
}
}
}
}
", "objectParameter");
parameterType.Should().BeOfType<ObjectType>();
var properties = parameterType.As<ObjectType>().Properties;
properties.Should().HaveCount(3);
properties["foo"].TypeReference.Type.Should().BeOfType<StringType>();
properties["bar"].TypeReference.Type.Should().BeOfType<IntegerType>();
properties["baz"].TypeReference.Type.Should().BeOfType<BooleanType>();
// By default, objects should accept additional properties without constraints as a fallback
parameterType.As<ObjectType>().AdditionalPropertiesType.Should().NotBeNull().And.Be(LanguageConstants.Any);
parameterType.As<ObjectType>().AdditionalPropertiesFlags.Should().HaveFlag(TypePropertyFlags.FallbackProperty);
}
[TestMethod]
public void Model_creates_object_from_additionalProperties_constraint()
{
var parameterType = GetLoadedParameterType(@"{
""$schema"": ""https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#"",
""contentVersion"": ""1.0.0.0"",
""languageVersion"": ""2.0"",
""resources"": {},
""parameters"": {
""objectParameter"": {
""type"": ""object"",
""additionalProperties"": { ""type"": ""string"" }
}
}
}
", "objectParameter");
parameterType.Should().BeOfType<ObjectType>();
var addlPropsType = parameterType.As<ObjectType>().AdditionalPropertiesType;
addlPropsType.Should().NotBeNull().And.BeOfType<StringType>();
parameterType.As<ObjectType>().AdditionalPropertiesFlags.Should().NotHaveFlag(TypePropertyFlags.FallbackProperty);
}
[TestMethod]
public void Model_creates_array_from_items_constraint()
{
var parameterType = GetLoadedParameterType(@"{
""$schema"": ""https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#"",
""contentVersion"": ""1.0.0.0"",
""languageVersion"": ""2.0"",
""resources"": {},
""parameters"": {
""arrayParameter"": {
""type"": ""array"",
""items"": { ""type"": ""string"" }
}
}
}
", "arrayParameter");
parameterType.Should().BeOfType<TypedArrayType>();
var itemType = parameterType.As<TypedArrayType>().Item;
itemType.Should().NotBeNull().And.BeOfType<StringType>();
}
[TestMethod]
public void Model_creates_tuple_from_prefixItems_constraint()
{
var parameterType = GetLoadedParameterType(@"{
""$schema"": ""https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#"",
""contentVersion"": ""1.0.0.0"",
""languageVersion"": ""2.0"",
""resources"": {},
""parameters"": {
""tupleParameter"": {
""type"": ""array"",
""prefixItems"": [
{ ""type"": ""string"" },
{ ""type"": ""int"" },
{ ""type"": ""bool"" }
]
}
}
}
", "tupleParameter");
parameterType.Should().BeOfType<TupleType>();
var items = parameterType.As<TupleType>().Items;
items.Should().HaveCount(3);
items[0].Type.Should().BeOfType<StringType>();
items[1].Type.Should().BeOfType<IntegerType>();
items[2].Type.Should().BeOfType<BooleanType>();
}
[TestMethod]
public void Model_creates_complex_type_from_nested_constraints()
{
var parameterType = GetLoadedParameterType(@"{
""$schema"": ""https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#"",
""contentVersion"": ""1.0.0.0"",
""languageVersion"": ""2.0"",
""resources"": {},
""parameters"": {
""complexParameter"": {
""type"": ""array"",
""items"": {
""type"": ""object"",
""additionalProperties"": {
""type"": ""array"",
""items"": {
""type"": ""object"",
""properties"": {
""foo"": {
""type"": ""string"",
""minLength"": 2,
""maxLength"": 4
},
""bar"": {
""type"": ""int"",
""minValue"": 1,
""maxValue"": 10
},
""baz"": {
""type"": ""array"",
""minLength"": 6,
""maxLength"": 8
}
}
}
}
}
}
}
}
", "complexParameter");
parameterType.Should().BeOfType<TypedArrayType>();
parameterType.As<TypedArrayType>().Item.Should().BeOfType<ObjectType>();
parameterType.As<TypedArrayType>().Item.As<ObjectType>().AdditionalPropertiesType.Should().NotBeNull().And.BeOfType<TypedArrayType>();
parameterType.As<TypedArrayType>().Item.As<ObjectType>().AdditionalPropertiesType.As<TypedArrayType>().Item.Should().BeOfType<ObjectType>();
var properties = parameterType.As<TypedArrayType>().Item.As<ObjectType>().AdditionalPropertiesType.As<TypedArrayType>().Item.As<ObjectType>().Properties;
properties.Should().HaveCount(3);
properties["foo"].TypeReference.Type.Should().Be(TypeFactory.CreateStringType(minLength: 2, maxLength: 4));
properties["bar"].TypeReference.Type.Should().Be(TypeFactory.CreateIntegerType(minValue: 1, maxValue: 10));
properties["baz"].TypeReference.Type.Should().Be(TypeFactory.CreateArrayType(minLength: 6, maxLength: 8));
}
[TestMethod]
public void Model_handles_valid_type_references()
{
var parameterType = GetLoadedParameterType(@"{
""$schema"": ""https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#"",
""contentVersion"": ""1.0.0.0"",
""languageVersion"": ""2.0"",
""resources"": {},
""definitions"": {
""intermediate"": {
""$ref"": ""#/definitions/myString""
},
""myString"": {
""type"": ""string""
}
},
""parameters"": {
""refParam"": {
""$ref"": ""#/definitions/intermediate""
}
}
}
", "refParam");
parameterType.Type.Should().BeOfType<StringType>();
}
[TestMethod]
public void Model_with_missing_type_reference_targets_is_a_load_error()
{
var model = LoadModel(@"{
""$schema"": ""https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#"",
""contentVersion"": ""1.0.0.0"",
""languageVersion"": ""2.0"",
""definitions"": {},
""resources"": {},
""definitions"": {},
""parameters"": {
""refParam"": {
""$ref"": ""#/definitions/doesntExist""
}
}
}
");
model.HasErrors().Should().BeTrue();
}
[TestMethod]
public void Model_with_cyclic_type_references_is_a_load_error()
{
var model = LoadModel(@"{
""$schema"": ""https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#"",
""contentVersion"": ""1.0.0.0"",
""languageVersion"": ""2.0"",
""resources"": {},
""definitions"": {
""intermediate"": {
""$ref"": ""#/definitions/myString""
},
""myString"": {
""$ref"": ""#/definitions/intermediate""
}
},
""parameters"": {
""refParam"": {
""$ref"": ""#/definitions/intermediate""
}
}
}
");
model.HasErrors().Should().BeTrue();
}
[TestMethod]
public void Model_uses_the_most_specific_description_for_type_references()
{
var jsonTemplate = @"{
""$schema"": ""https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#"",
""contentVersion"": ""1.0.0.0"",
""languageVersion"": ""2.0"",
""resources"": {},
""definitions"": {
""intermediate"": {
""$ref"": ""#/definitions/myString"",
""metadata"": {
""description"": ""Description on #/definitions/intermediate""
}
},
""myString"": {
""type"": ""string"",
""metadata"": {
""description"": ""Description on #/definitions/myString""
}
}
},
""parameters"": {
""refParam"": {
""$ref"": ""#/definitions/intermediate"",
""metadata"": {
""description"": ""Description on #/parameters/refParam""
}
},
""undescribedParam"": {
""$ref"": ""#/definitions/intermediate""
}
}
}
";
ArmTemplateSemanticModel model = new(SourceFileFactory.CreateArmTemplateFile(new("inmemory://template.json"), jsonTemplate));
model.Parameters.TryGetValue("refParam", out var refParam).Should().BeTrue();
refParam!.Description.Should().Be("Description on #/parameters/refParam");
model.Parameters.TryGetValue("undescribedParam", out var undescribedParam).Should().BeTrue();
undescribedParam!.Description.Should().Be("Description on #/definitions/intermediate");
}
[TestMethod]
public void Model_creates_literal_types_from_allowedValues_constraint()
{
var jsonTemplate = @"{
""$schema"": ""https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#"",
""contentVersion"": ""1.0.0.0"",
""languageVersion"": ""2.0"",
""resources"": {},
""parameters"": {
""stringLiteral"": {
""type"": ""string"",
""allowedValues"": [""foo""]
},
""stringLiteralUnion"": {
""type"": ""string"",
""allowedValues"": [""snap"", ""crackle"", ""pop""]
},
""arrayLiteralUnion"": {
""type"": ""array"",
""allowedValues"": [[""an"", ""array""], [""of"", ""strings""], []]
},
""arrayOfSubsetOfLiterals"": {
""type"": ""array"",
""allowedValues"": [""fizz"", ""buzz"", 1, 2, true, {""key"": ""value"", ""arrayProp"": [""fee"", ""fi"", ""fo"", ""fum""]}, null]
}
}
}
";
ArmTemplateSemanticModel model = new(SourceFileFactory.CreateArmTemplateFile(new("inmemory://template.json"), jsonTemplate));
model.Parameters.TryGetValue("stringLiteral", out var stringLiteral).Should().BeTrue();
stringLiteral!.TypeReference.Type.Should().Be(TypeFactory.CreateStringLiteralType("foo"));
model.Parameters.TryGetValue("stringLiteralUnion", out var stringLiteralUnion).Should().BeTrue();
stringLiteralUnion!.TypeReference.Type.Name.Should().Be("'crackle' | 'pop' | 'snap'");
model.Parameters.TryGetValue("arrayLiteralUnion", out var arrayLiteralUnion).Should().BeTrue();
arrayLiteralUnion!.TypeReference.Type.Name.Should().Be("<empty array> | ['an', 'array'] | ['of', 'strings']");
model.Parameters.TryGetValue("arrayOfSubsetOfLiterals", out var arrayOfSubsetOfLiterals).Should().BeTrue();
arrayOfSubsetOfLiterals!.TypeReference.Type.Name.Should().Be("('buzz' | 'fizz' | 1 | 2 | null | true | { key: 'value', arrayProp: ['fee', 'fi', 'fo', 'fum'] })[]");
}
[TestMethod]
public void Model_creates_union_null_types_from_nullable_modifier()
{
var parameterType = GetLoadedParameterType(@"{
""$schema"": ""https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#"",
""contentVersion"": ""1.0.0.0"",
""languageVersion"": ""2.0"",
""resources"": {},
""parameters"": {
""nullableParam"": {
""type"": ""string"",
""nullable"": true
}
}
}
", "nullableParam");
parameterType.Should().BeOfType<UnionType>();
var members = parameterType.As<UnionType>().Members;
members.Should().HaveCount(2);
members.Should().Contain(new[] { LanguageConstants.Null, LanguageConstants.LooseString });
}
[TestMethod]
public void Model_creates_tagged_union_types_from_nullable_modifier()
{
var parameterType = GetLoadedParameterType(
"""
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"languageVersion": "2.0",
"contentVersion": "1.0.0.0",
"definitions": {
"typeA": {
"type": "object",
"properties": {
"type": {
"type": "string",
"allowedValues": [
"a"
]
},
"value": {
"type": "string"
}
},
"additionalProperties": false
},
"typeB": {
"type": "object",
"properties": {
"type": {
"type": "string",
"allowedValues": [
"b"
]
},
"value": {
"type": "int"
}
},
"additionalProperties": false
}
},
"parameters": {
"foo": {
"type": "object",
"discriminator": {
"propertyName": "type",
"mapping": {
"a": {
"$ref": "#/definitions/typeA"
},
"b": {
"$ref": "#/definitions/typeB"
}
}
}
}
},
"resources": {}
}
""",
"foo");
var taggedUnionType = parameterType.Should().BeOfType<DiscriminatedObjectType>().Subject;
taggedUnionType.DiscriminatorKey.Should().Be("type");
taggedUnionType.UnionMembersByKey.Keys.Order().Should().Equal(new[] { "'a'", "'b'" });
taggedUnionType.UnionMembersByKey["'a'"].Properties["value"].TypeReference.Type.Should().Be(LanguageConstants.String);
taggedUnionType.UnionMembersByKey["'b'"].Properties["value"].TypeReference.Type.Should().Be(LanguageConstants.Int);
}
[TestMethod]
public void Resource_derivation_metadata_causes_type_to_be_loaded_as_unbound_resource_derived_type()
{
var parameterType = GetLoadedParameterType($$"""
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"languageVersion": "2.0",
"resources": {},
"parameters": {
"arrayOfStorageAccounts": {
"type": "array",
"items": {
"type": "object",
"metadata": {
"{{LanguageConstants.MetadataResourceDerivedTypePropertyName}}": "Microsoft.Storage/storageAccounts@2022-09-01"
}
}
}
}
}
""",
"arrayOfStorageAccounts");
var typedArrayParameterType = parameterType.Should().BeOfType<TypedArrayType>().Subject;
var itemType = typedArrayParameterType.Item.Should().BeOfType<UnresolvedResourceDerivedType>().Subject;
itemType.TypeReference.Type.Should().Be("Microsoft.Storage/storageAccounts");
itemType.TypeReference.ApiVersion.Should().Be("2022-09-01");
itemType.FallbackType.Should().Be(LanguageConstants.Object);
}
[TestMethod]
public void Resource_derivation_metadata_causes_tagged_union_variant_to_be_loaded_as_unbound_resource_derived_type()
{
var parameterType = GetLoadedParameterType($$"""
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"languageVersion": "2.0",
"resources": {},
"parameters": {
"taggedUnion": {
"type": "object",
"discriminator": {
"propertyName": "name",
"mapping": {
"foo": {
"type": "object",
"properties": {
"name": {
"type": "string",
"allowedValues": ["foo"]
}
}
},
"default": {
"type": "object",
"metadata": {
"{{LanguageConstants.MetadataResourceDerivedTypePropertyName}}": "Microsoft.Resources/tags@2022-09-01"
}
}
}
}
}
}
}
""",
"taggedUnion");
var typedArrayParameterType = parameterType.Should().BeOfType<DiscriminatedObjectType>().Subject;
var itemType = typedArrayParameterType.UnionMembersByKey["'default'"].Should().BeOfType<UnresolvedResourceDerivedPartialObjectType>().Subject;
itemType.TypeReference.Type.Should().Be("Microsoft.Resources/tags");
itemType.TypeReference.ApiVersion.Should().Be("2022-09-01");
var fallbackType = itemType.FallbackType.Should().BeAssignableTo<ObjectType>().Subject;
fallbackType.Properties["name"].TypeReference.Type.Should().Be(TypeFactory.CreateStringLiteralType("default"));
}
[TestMethod]
public void Empty_properties_constraint_causes_loaded_object_to_use_FallbackProperty_flag_on_additional_properties()
{
var parameterType = GetLoadedParameterType("""
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"languageVersion": "2.0",
"resources": {},
"parameters": {
"emptyObject": {
"type": "object",
"properties": {}
}
}
}
""",
"emptyObject");
var objectParameterType = parameterType.Should().BeAssignableTo<ObjectType>().Subject;
objectParameterType.AdditionalPropertiesType.Should().Be(LanguageConstants.Any);
objectParameterType.AdditionalPropertiesFlags.Should().HaveFlag(TypePropertyFlags.FallbackProperty);
}
private static TypeSymbol GetLoadedParameterType(string jsonTemplate, string parameterName)
{
var model = LoadModel(jsonTemplate);
model.Parameters.TryGetValue(parameterName, out var parameter).Should().BeTrue();
return parameter!.TypeReference.Type;
}
private static ArmTemplateSemanticModel LoadModel(string jsonTemplate)
=> new(SourceFileFactory.CreateArmTemplateFile(new("inmemory://template.json"), jsonTemplate));
}