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JsonParserGeneratorTest.kt
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JsonParserGeneratorTest.kt
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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
package software.amazon.smithy.rust.codegen.core.smithy.protocols.parse
import org.junit.jupiter.api.Test
import software.amazon.smithy.codegen.core.Symbol
import software.amazon.smithy.model.shapes.OperationShape
import software.amazon.smithy.model.shapes.StringShape
import software.amazon.smithy.model.shapes.StructureShape
import software.amazon.smithy.rust.codegen.core.smithy.generators.EnumGenerator
import software.amazon.smithy.rust.codegen.core.smithy.generators.TestEnumType
import software.amazon.smithy.rust.codegen.core.smithy.generators.UnionGenerator
import software.amazon.smithy.rust.codegen.core.smithy.generators.builderSymbol
import software.amazon.smithy.rust.codegen.core.smithy.protocols.HttpTraitHttpBindingResolver
import software.amazon.smithy.rust.codegen.core.smithy.protocols.ProtocolContentTypes
import software.amazon.smithy.rust.codegen.core.smithy.protocols.restJsonFieldName
import software.amazon.smithy.rust.codegen.core.smithy.transformers.OperationNormalizer
import software.amazon.smithy.rust.codegen.core.smithy.transformers.RecursiveShapeBoxer
import software.amazon.smithy.rust.codegen.core.testutil.TestWorkspace
import software.amazon.smithy.rust.codegen.core.testutil.asSmithyModel
import software.amazon.smithy.rust.codegen.core.testutil.compileAndTest
import software.amazon.smithy.rust.codegen.core.testutil.renderWithModelBuilder
import software.amazon.smithy.rust.codegen.core.testutil.testCodegenContext
import software.amazon.smithy.rust.codegen.core.testutil.testSymbolProvider
import software.amazon.smithy.rust.codegen.core.testutil.unitTest
import software.amazon.smithy.rust.codegen.core.util.lookup
import software.amazon.smithy.rust.codegen.core.util.outputShape
class JsonParserGeneratorTest {
private val baseModel = """
namespace test
use aws.protocols#restJson1
union Choice {
blob: Blob,
boolean: Boolean,
date: Timestamp,
document: Document,
enum: FooEnum,
int: Integer,
list: SomeList,
listSparse: SomeSparseList,
long: Long,
map: MyMap,
mapSparse: MySparseMap,
number: Double,
s: String,
top: Top,
unit: Unit,
}
@enum([{name: "FOO", value: "FOO"}])
string FooEnum
map MyMap {
key: String,
value: Choice,
}
@sparse
map MySparseMap {
key: String,
value: Choice,
}
list SomeList {
member: Choice
}
@sparse
list SomeSparseList {
member: Choice
}
structure EmptyStruct {
}
structure Top {
@required
choice: Choice,
field: String,
extra: Integer,
@jsonName("rec")
recursive: TopList,
empty: EmptyStruct,
}
list TopList {
member: Top
}
structure OpOutput {
@httpHeader("x-test")
someHeader: String,
top: Top
}
@error("client")
structure Error {
message: String,
reason: String
}
@http(uri: "/top", method: "POST")
operation Op {
output: OpOutput,
errors: [Error]
}
""".asSmithyModel()
@Test
fun `generates valid deserializers`() {
val model = RecursiveShapeBoxer().transform(OperationNormalizer.transform(baseModel))
val codegenContext = testCodegenContext(model)
val symbolProvider = codegenContext.symbolProvider
fun builderSymbol(shape: StructureShape): Symbol =
shape.builderSymbol(symbolProvider)
val parserGenerator = JsonParserGenerator(
codegenContext,
HttpTraitHttpBindingResolver(model, ProtocolContentTypes.consistent("application/json")),
::restJsonFieldName,
::builderSymbol,
)
val operationGenerator = parserGenerator.operationParser(model.lookup("test#Op"))
val payloadGenerator = parserGenerator.payloadParser(model.lookup("test#OpOutput\$top"))
val errorParser = parserGenerator.errorParser(model.lookup("test#Error"))
val project = TestWorkspace.testProject(testSymbolProvider(model))
project.lib {
unitTest(
"json_parser",
"""
use test_model::Choice;
// Generate the document serializer even though it's not tested directly
// ${format(payloadGenerator)}
let json = br#"
{ "top":
{ "extra": 45,
"field": "something",
"choice": { "int": 5 },
"empty": { "not_empty": true }
}
}
"#;
let output = ${format(operationGenerator!!)}(json, test_output::op_output::Builder::default()).unwrap().build();
let top = output.top.expect("top");
assert_eq!(Some(45), top.extra);
assert_eq!(Some("something".to_string()), top.field);
assert_eq!(Some(Choice::Int(5)), top.choice);
""",
)
unitTest(
"empty_body",
"""
// empty body
let output = ${format(operationGenerator)}(b"", test_output::op_output::Builder::default()).unwrap().build();
assert_eq!(output.top, None);
""",
)
unitTest(
"unknown_variant",
"""
// unknown variant
let input = br#"{ "top": { "choice": { "somenewvariant": "data" } } }"#;
let output = ${format(operationGenerator)}(input, test_output::op_output::Builder::default()).unwrap().build();
assert!(output.top.unwrap().choice.unwrap().is_unknown());
""",
)
unitTest(
"empty_error",
"""
// empty error
let error_output = ${format(errorParser!!)}(b"", test_error::error::Builder::default()).unwrap().build();
assert_eq!(error_output.message, None);
""",
)
unitTest(
"error_with_message",
"""
// error with message
let error_output = ${format(errorParser)}(br#"{"message": "hello"}"#, test_error::error::Builder::default()).unwrap().build();
assert_eq!(error_output.message.expect("message should be set"), "hello");
""",
)
}
model.lookup<StructureShape>("test#Top").also { top ->
project.moduleFor(top) {
top.renderWithModelBuilder(model, symbolProvider, this)
model.lookup<StructureShape>("test#EmptyStruct").renderWithModelBuilder(model, symbolProvider, this)
UnionGenerator(model, symbolProvider, this, model.lookup("test#Choice")).render()
val enum = model.lookup<StringShape>("test#FooEnum")
EnumGenerator(model, symbolProvider, enum, TestEnumType).render(this)
}
}
model.lookup<OperationShape>("test#Op").outputShape(model).also { output ->
project.moduleFor(output) {
output.renderWithModelBuilder(model, symbolProvider, this)
}
}
model.lookup<StructureShape>("test#Error").also { error ->
project.moduleFor(error) {
error.renderWithModelBuilder(model, symbolProvider, this)
}
}
project.compileAndTest()
}
}