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test: agent SDK usage extraction and option defaults (#186) #423

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77 changes: 77 additions & 0 deletions src/agent_sdk.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -686,6 +686,83 @@ test "integration: agent_sdk model param is forwarded" {
}
}

test "agent_sdk: parseClaudeLine extracts usage from result event" {
const alloc = std.testing.allocator;

var out: std.ArrayList(u8) = .empty;
defer out.deinit(alloc);
var accumulated: std.ArrayList(u8) = .empty;
defer accumulated.deinit(alloc);
var found = false;
var ti: u64 = 0;
var to: u64 = 0;

const line =
\\{"type":"result","subtype":"success","result":"done","usage":{"input_tokens":100,"cache_creation_input_tokens":50,"cache_read_input_tokens":25,"output_tokens":200},"session_id":"s1"}
;
parseClaudeLine(alloc, line, &out, &accumulated, &found, &ti, &to);

try std.testing.expect(found);
try std.testing.expectEqual(@as(u64, 175), ti);
try std.testing.expectEqual(@as(u64, 200), to);
}

test "agent_sdk: parseClaudeLine accumulates usage from assistant events" {
const alloc = std.testing.allocator;

var out: std.ArrayList(u8) = .empty;
defer out.deinit(alloc);
var accumulated: std.ArrayList(u8) = .empty;
defer accumulated.deinit(alloc);
var found = false;
var ti: u64 = 0;
var to: u64 = 0;

parseClaudeLine(alloc,
\\{"type":"assistant","message":{"content":[{"type":"text","text":"a"}],"usage":{"input_tokens":10,"output_tokens":5}},"session_id":"s1"}
, &out, &accumulated, &found, &ti, &to);
parseClaudeLine(alloc,
\\{"type":"assistant","message":{"content":[{"type":"text","text":"b"}],"usage":{"input_tokens":20,"output_tokens":8}},"session_id":"s1"}
, &out, &accumulated, &found, &ti, &to);

try std.testing.expectEqual(@as(u64, 30), ti);
try std.testing.expectEqual(@as(u64, 13), to);
}

test "agent_sdk: AgentOptions defaults" {
const opts = AgentOptions{};
try std.testing.expectEqual(@as(?[]const u8, null), opts.allowed_tools);
try std.testing.expectEqual(@as(?[]const u8, null), opts.permission_mode);
try std.testing.expectEqual(@as(?[]const u8, null), opts.cwd);
try std.testing.expect(!opts.writable);
try std.testing.expectEqual(@as(?[]const u8, null), opts.model);
}

test "agent_sdk: parseClaudeLine result usage replaces assistant accumulation" {
const alloc = std.testing.allocator;

var out: std.ArrayList(u8) = .empty;
defer out.deinit(alloc);
var accumulated: std.ArrayList(u8) = .empty;
defer accumulated.deinit(alloc);
var found = false;
var ti: u64 = 0;
var to: u64 = 0;

// Assistant event accumulates usage
parseClaudeLine(alloc,
\\{"type":"assistant","message":{"content":[{"type":"text","text":"x"}],"usage":{"input_tokens":999,"output_tokens":888}},"session_id":"s1"}
, &out, &accumulated, &found, &ti, &to);
try std.testing.expectEqual(@as(u64, 999), ti);

// Result event replaces input with authoritative number
parseClaudeLine(alloc,
\\{"type":"result","subtype":"success","result":"final","usage":{"input_tokens":50,"output_tokens":30},"session_id":"s1"}
, &out, &accumulated, &found, &ti, &to);
try std.testing.expectEqual(@as(u64, 50), ti);
try std.testing.expectEqual(@as(u64, 30), to);
}

test "agent_sdk: stripCodexEnv removes CODEX_* vars but preserves unrelated env" {
const alloc = std.testing.allocator;
var env = std.process.EnvMap.init(alloc);
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