Add end-to-end test suite (#2167)

test/e2e/types.ts

@@ -0,0 +1,43 @@
+/**
+ * Shared types for the e2e suite.
+ */
+
+export const ALL_TRANSPORTS = ['inMemory', 'stdio', 'streamableHttp', 'streamableHttpStateless', 'sse'] as const;
+export type Transport = (typeof ALL_TRANSPORTS)[number];
+
+export const ALL_SPEC_VERSIONS = ['2025-11-25'] as const;
+export type SpecVersion = (typeof ALL_SPEC_VERSIONS)[number];
+
+/**
+ * Arguments every test body receives. Expand with new matrix axes here so
+ * test signatures don't churn — bodies destructure only what they use.
+ */
+export interface TestArgs {
+    transport: Transport;
+    protocolVersion: SpecVersion;
+}
+
+export interface KnownFailure {
+    test?: string;
+    transport?: Transport;
+    specVersion?: SpecVersion;
+    note: string;
+}
+
+export interface Requirement {
+    source: string;
+    behavior: string;
+    transports?: readonly Transport[];
+    /** Free-form rationale for how the entry is set up (e.g. why certain transports are excluded). */
+    note?: string;
+
+    /** First / last spec versions a requirement applies to; changed behaviors are sibling entries linked via `supersedes`. */
+    addedInSpecVersion?: SpecVersion;
+    removedInSpecVersion?: SpecVersion;
+    /** Requirement id this entry replaces (for behaviors changed by a spec release). */
+
+    supersedes?: string;
+    knownFailures?: readonly KnownFailure[];
+
+    deferred?: string;
+}