http-specs, test case on status code range (#5577)

Currently I only added case for the range in error response.

Range can also happen on success response (e.g. 200-299).

Author: weidongxu-microsoft

Diff for: .chronus/changes/http-specs_error-code-range-2025-0-13-14-28-49.md

@@ -0,0 +1,7 @@
+---
+changeKind: feature
+packages:
+  - "@typespec/http-specs"
+---
+
+Add test case on status code range

Diff for: packages/http-specs/spec-summary.md

@@ -2082,6 +2082,40 @@ Expected request body:
 </SimpleModel>
 ```
 
+### Response_StatusCodeRange_errorResponseStatusCode404
+
+- Endpoint: `get /response/status-code-range/error-response-status-code-404`
+
+Test case for range of status code in error response.
+
+Verify that the result of the API is an error/exception in client, and the error response can be de-serialized to NotFoundError model (instead of Standard4XXError model).
+
+Expected status code 404 and response body:
+
+```json
+{
+  "code": "not-found",
+  "resourceId": "resource1"
+}
+```
+
+### Response_StatusCodeRange_errorResponseStatusCodeInRange
+
+- Endpoint: `get /response/status-code-range/error-response-status-code-in-range`
+
+Test case for range of status code in error response.
+
+Verify that the result of the API is an error/exception in client, and the error response can be de-serialized to ErrorInRange model (instead of DefaultError model).
+
+Expected status code 494 and response body:
+
+```json
+{
+  "code": "request-header-too-large",
+  "message": "Request header too large"
+}
+```
+
 ### Routes_fixed
 
 - Endpoint: `get /routes/fixed`
@@ -2118,143 +2152,143 @@ Expected path: /routes/path/explicit/a
 
 Test label expansion with explode: true when passed an array value.
 Param value: ["a","b"]
-Expected path: /routes/label/explode/array.a.b
+Expected path: /routes/path/label/explode/array.a.b
 
 ### Routes_PathParameters_LabelExpansion_Explode_primitive
 
 - Endpoint: `get /routes/path/label/explode/primitive{.param*}`
 
 Test label expansion with explode: true when passed a primitive value.
 Param value: "a"
-Expected path: /routes/label/explode/primitive.a
+Expected path: /routes/path/label/explode/primitive.a
 
 ### Routes_PathParameters_LabelExpansion_Explode_record
 
 - Endpoint: `get /routes/path/label/explode/record{.param*}`
 
 Test label expansion with explode: true when passed a record value.
 Param value: {a: 1, b: 2}
-Expected path: /routes/label/explode/record.a=1.b=2
+Expected path: /routes/path/label/explode/record.a=1.b=2
 
 ### Routes_PathParameters_LabelExpansion_Standard_array
 
 - Endpoint: `get /routes/path/label/standard/array{.param}`
 
 Test label expansion with explode: false when passed an array value.
 Param value: ["a","b"]
-Expected path: /routes/label/standard/array.a,b
+Expected path: /routes/path/label/standard/array.a,b
 
 ### Routes_PathParameters_LabelExpansion_Standard_primitive
 
 - Endpoint: `get /routes/path/label/standard/primitive{.param}`
 
 Test label expansion with explode: false when passed a primitive value.
 Param value: "a"
-Expected path: /routes/label/standard/primitive.a
+Expected path: /routes/path/label/standard/primitive.a
 
 ### Routes_PathParameters_LabelExpansion_Standard_record
 
 - Endpoint: `get /routes/path/label/standard/record{.param}`
 
 Test label expansion with explode: false when passed a record value.
 Param value: {a: 1, b: 2}
-Expected path: /routes/label/standard/record.a,1,b,2
+Expected path: /routes/path/label/standard/record.a,1,b,2
 
 ### Routes_PathParameters_MatrixExpansion_Explode_array
 
 - Endpoint: `get /routes/path/matrix/explode/array{;param*}`
 
 Test matrix expansion with explode: true when passed an array value.
 Param value: ["a","b"]
-Expected path: /routes/matrix/explode/array;a.b
+Expected path: /routes/path/matrix/explode/array;a.b
 
 ### Routes_PathParameters_MatrixExpansion_Explode_primitive
 
 - Endpoint: `get /routes/path/matrix/explode/primitive{;param*}`
 
 Test matrix expansion with explode: true when passed a primitive value.
 Param value: "a"
-Expected path: /routes/matrix/explode/primitive;a
+Expected path: /routes/path/matrix/explode/primitive;a
 
 ### Routes_PathParameters_MatrixExpansion_Explode_record
 
 - Endpoint: `get /routes/path/matrix/explode/record{;param*}`
 
 Test matrix expansion with explode: true when passed a record value.
 Param value: {a: 1, b: 2}
-Expected path: /routes/matrix/explode/record;a=1;b=2
+Expected path: /routes/path/matrix/explode/record;a=1;b=2
 
 ### Routes_PathParameters_MatrixExpansion_Standard_array
 
 - Endpoint: `get /routes/path/matrix/standard/array{;param}`
 
 Test matrix expansion with explode: false when passed an array value.
 Param value: ["a","b"]
-Expected path: /routes/matrix/standard/array;a,b
+Expected path: /routes/path/matrix/standard/array;a,b
 
 ### Routes_PathParameters_MatrixExpansion_Standard_primitive
 
 - Endpoint: `get /routes/path/matrix/standard/primitive{;param}`
 
 Test matrix expansion with explode: false when passed a primitive value.
 Param value: "a"
-Expected path: /routes/matrix/standard/primitive;a
+Expected path: /routes/path/matrix/standard/primitive;a
 
 ### Routes_PathParameters_MatrixExpansion_Standard_record
 
 - Endpoint: `get /routes/path/matrix/standard/record{;param}`
 
 Test matrix expansion with explode: false when passed a record value.
 Param value: {a: 1, b: 2}
-Expected path: /routes/matrix/standard/record;a,1,b,2
+Expected path: /routes/path/matrix/standard/record;a,1,b,2
 
 ### Routes_PathParameters_PathExpansion_Explode_array
 
 - Endpoint: `get /routes/path/path/explode/array{/param*}`
 
 Test path expansion with explode: true when passed an array value.
 Param value: ["a","b"]
-Expected path: /routes/path/explode/array/a/b
+Expected path: /routes/path/path/explode/array/a/b
 
 ### Routes_PathParameters_PathExpansion_Explode_primitive
 
 - Endpoint: `get /routes/path/path/explode/primitive{/param*}`
 
 Test path expansion with explode: true when passed a primitive value.
 Param value: "a"
-Expected path: /routes/path/explode/primitive/a
+Expected path: /routes/path/path/explode/primitive/a
 
 ### Routes_PathParameters_PathExpansion_Explode_record
 
 - Endpoint: `get /routes/path/path/explode/record{/param*}`
 
 Test path expansion with explode: true when passed a record value.
 Param value: {a: 1, b: 2}
-Expected path: /routes/path/explode/record/a=1/b=2
+Expected path: /routes/path/path/explode/record/a=1/b=2
 
 ### Routes_PathParameters_PathExpansion_Standard_array
 
 - Endpoint: `get /routes/path/path/standard/array{/param}`
 
 Test path expansion with explode: false when passed an array value.
 Param value: ["a","b"]
-Expected path: /routes/path/standard/array/a,b
+Expected path: /routes/path/path/standard/array/a,b
 
 ### Routes_PathParameters_PathExpansion_Standard_primitive
 
 - Endpoint: `get /routes/path/path/standard/primitive{/param}`
 
 Test path expansion with explode: false when passed a primitive value.
 Param value: "a"
-Expected path: /routes/path/standard/primitive/a
+Expected path: /routes/path/path/standard/primitive/a
 
 ### Routes_PathParameters_PathExpansion_Standard_record
 
 - Endpoint: `get /routes/path/path/standard/record{/param}`
 
 Test path expansion with explode: false when passed a record value.
 Param value: {a: 1, b: 2}
-Expected path: /routes/path/standard/record/a,1,b,2
+Expected path: /routes/path/path/standard/record/a,1,b,2
 
 ### Routes_PathParameters_ReservedExpansion_annotation
 
@@ -2278,47 +2312,47 @@ Expected path: "/routes/path/reserved-expansion/template/foo/bar%20baz"
 
 Test simple expansion with explode: true when passed an array value.
 Param value: ["a","b"]
-Expected path: /routes/simple/explode/arraya.b
+Expected path: /routes/path/simple/explode/arraya.b
 
 ### Routes_PathParameters_SimpleExpansion_Explode_primitive
 
 - Endpoint: `get /routes/path/simple/explode/primitive{param*}`
 
 Test simple expansion with explode: true when passed a primitive value.
 Param value: "a"
-Expected path: /routes/simple/explode/primitivea
+Expected path: /routes/path/simple/explode/primitivea
 
 ### Routes_PathParameters_SimpleExpansion_Explode_record
 
 - Endpoint: `get /routes/path/simple/explode/record{param*}`
 
 Test simple expansion with explode: true when passed a record value.
 Param value: {a: 1, b: 2}
-Expected path: /routes/simple/explode/recorda=1,b=2
+Expected path: /routes/path/simple/explode/recorda=1,b=2
 
 ### Routes_PathParameters_SimpleExpansion_Standard_array
 
 - Endpoint: `get /routes/path/simple/standard/array{param}`
 
 Test simple expansion with explode: false when passed an array value.
 Param value: ["a","b"]
-Expected path: /routes/simple/standard/arraya,b
+Expected path: /routes/path/simple/standard/arraya,b
 
 ### Routes_PathParameters_SimpleExpansion_Standard_primitive
 
 - Endpoint: `get /routes/path/simple/standard/primitive{param}`
 
 Test simple expansion with explode: false when passed a primitive value.
 Param value: "a"
-Expected path: /routes/simple/standard/primitivea
+Expected path: /routes/path/simple/standard/primitivea
 
 ### Routes_PathParameters_SimpleExpansion_Standard_record
 
 - Endpoint: `get /routes/path/simple/standard/record{param}`
 
 Test simple expansion with explode: false when passed a record value.
 Param value: {a: 1, b: 2}
-Expected path: /routes/simple/standard/recorda,1,b,2
+Expected path: /routes/path/simple/standard/recorda,1,b,2
 
 ### Routes_PathParameters_templateOnly
 

Diff for: packages/http-specs/specs/response/status-code-range/main.tsp

@@ -0,0 +1,82 @@
+import "@typespec/http";
+import "@typespec/spector";
+
+using Http;
+using Spector;
+
+/**
+ * Test for range of status code.
+ */
+@scenarioService("/response/status-code-range")
+namespace Response.StatusCodeRange;
+
+@scenario
+@scenarioDoc("""
+  Test case for range of status code in error response.
+  
+  Verify that the result of the API is an error/exception in client, and the error response can be de-serialized to ErrorInRange model (instead of DefaultError model).
+  
+  Expected status code 494 and response body:
+  ```json
+  { 
+    "code": "request-header-too-large",
+    "message": "Request header too large"
+  }
+  ```
+  """)
+@route("/error-response-status-code-in-range")
+@get
+op errorResponseStatusCodeInRange(): 204 | ErrorInRange | DefaultError;
+
+@scenario
+@scenarioDoc("""
+  Test case for range of status code in error response.
+  
+  Verify that the result of the API is an error/exception in client, and the error response can be de-serialized to NotFoundError model (instead of Standard4XXError model).
+  
+  Expected status code 404 and response body:
+  ```json
+  { 
+    "code": "not-found",
+    "resourceId": "resource1"
+  }
+  ```
+  """)
+@route("/error-response-status-code-404")
+@get
+op errorResponseStatusCode404(): 204 | NotFoundError | Standard4XXError;
+
+@error
+model NotFoundError {
+  @statusCode
+  _: 404;
+
+  code: string;
+  resourceId: string;
+}
+
+@error
+model ErrorInRange {
+  @minValue(494)
+  @maxValue(499)
+  @statusCode
+  _: int32;
+
+  code: string;
+  message: string;
+}
+
+@error
+model Standard4XXError {
+  @minValue(400)
+  @maxValue(499)
+  @statusCode
+  _: int32;
+
+  code: string;
+}
+
+@error
+model DefaultError {
+  code: string;
+}

Diff for: packages/http-specs/specs/response/status-code-range/mockapi.ts

@@ -0,0 +1,35 @@
+import { json, passOnSuccess, ScenarioMockApi } from "@typespec/spec-api";
+
+export const Scenarios: Record<string, ScenarioMockApi> = {};
+
+Scenarios.Response_StatusCodeRange_errorResponseStatusCodeInRange = passOnSuccess({
+  uri: "/response/status-code-range/error-response-status-code-in-range",
+  method: "get",
+  request: {
+    status: 494,
+  },
+  response: {
+    status: 494,
+    body: json({
+      code: "request-header-too-large",
+      message: "Request header too large",
+    }),
+  },
+  kind: "MockApiDefinition",
+});
+
+Scenarios.Response_StatusCodeRange_errorResponseStatusCode404 = passOnSuccess({
+  uri: "/response/status-code-range/error-response-status-code-404",
+  method: "get",
+  request: {
+    status: 404,
+  },
+  response: {
+    status: 404,
+    body: json({
+      code: "not-found",
+      resourceId: "resource1",
+    }),
+  },
+  kind: "MockApiDefinition",
+});