test: migrate suites to e2e coverage layout

src/agents/usage.test.ts

@@ -1,92 +0,0 @@
-import { describe, expect, it } from "vitest";
-import { deriveSessionTotalTokens, hasNonzeroUsage, normalizeUsage } from "./usage.js";
-
-describe("normalizeUsage", () => {
-  it("normalizes Anthropic-style snake_case usage", () => {
-    const usage = normalizeUsage({
-      input_tokens: 1200,
-      output_tokens: 340,
-      cache_creation_input_tokens: 200,
-      cache_read_input_tokens: 50,
-      total_tokens: 1790,
-    });
-    expect(usage).toEqual({
-      input: 1200,
-      output: 340,
-      cacheRead: 50,
-      cacheWrite: 200,
-      total: 1790,
-    });
-  });
-
-  it("normalizes OpenAI-style prompt/completion usage", () => {
-    const usage = normalizeUsage({
-      prompt_tokens: 987,
-      completion_tokens: 123,
-      total_tokens: 1110,
-    });
-    expect(usage).toEqual({
-      input: 987,
-      output: 123,
-      cacheRead: undefined,
-      cacheWrite: undefined,
-      total: 1110,
-    });
-  });
-
-  it("returns undefined for empty usage objects", () => {
-    expect(normalizeUsage({})).toBeUndefined();
-  });
-
-  it("guards against empty/zero usage overwrites", () => {
-    expect(hasNonzeroUsage(undefined)).toBe(false);
-    expect(hasNonzeroUsage(null)).toBe(false);
-    expect(hasNonzeroUsage({})).toBe(false);
-    expect(hasNonzeroUsage({ input: 0, output: 0 })).toBe(false);
-    expect(hasNonzeroUsage({ input: 1 })).toBe(true);
-    expect(hasNonzeroUsage({ total: 1 })).toBe(true);
-  });
-
-  it("does not clamp derived session total tokens to the context window", () => {
-    expect(
-      deriveSessionTotalTokens({
-        usage: {
-          input: 27,
-          cacheRead: 2_400_000,
-          cacheWrite: 0,
-          total: 2_402_300,
-        },
-        contextTokens: 200_000,
-      }),
-    ).toBe(2_400_027);
-  });
-
-  it("uses prompt tokens when within context window", () => {
-    expect(
-      deriveSessionTotalTokens({
-        usage: {
-          input: 1_200,
-          cacheRead: 300,
-          cacheWrite: 50,
-          total: 2_000,
-        },
-        contextTokens: 200_000,
-      }),
-    ).toBe(1_550);
-  });
-
-  it("prefers explicit prompt token overrides", () => {
-    expect(
-      deriveSessionTotalTokens({
-        usage: {
-          input: 1_200,
-          cacheRead: 300,
-          cacheWrite: 50,
-          total: 9_999,
-        },
-        promptTokens: 65_000,
-        contextTokens: 200_000,
-      }),
-    ).toBe(65_000);
-  });
-});