#!/usr/bin/env bats
# Tests for lib/format.sh — pure formatting functions

load test_helper.sh

setup() {
    source_lib common.sh
    source_lib format.sh
}

# ── human_bytes ──────────────────────────────────────────

@test "human_bytes: 0 bytes" {
    run human_bytes 0
    assert_output "0 B"
}

@test "human_bytes: small value (500 bytes)" {
    run human_bytes 500
    assert_output "500 B"
}

@test "human_bytes: exactly 1 KiB" {
    run human_bytes 1024
    assert_output "1 KiB"
}

@test "human_bytes: exactly 1 MiB" {
    run human_bytes 1048576
    assert_output "1 MiB"
}

@test "human_bytes: exactly 1 GiB" {
    run human_bytes 1073741824
    assert_output "1.0 GiB"
}

@test "human_bytes: 32 GiB (typical VRAM)" {
    run human_bytes 34359738368
    assert_output "32.0 GiB"
}

@test "human_bytes: 512 MiB (optimal VRAM)" {
    run human_bytes 536870912
    assert_output "512 MiB"
}

@test "human_bytes: sub-GiB value formats with leading zero (0.5 GiB)" {
    # 0.5 GiB = 536870912 bytes — should NOT be "0.5 GiB" since < 1 GiB uses MiB
    run human_bytes 536870912
    assert_output "512 MiB"
}

@test "human_bytes: 1.5 GiB has correct decimal" {
    run human_bytes 1610612736
    assert_output "1.5 GiB"
}

@test "human_bytes: empty/missing argument defaults to 0" {
    run human_bytes ""
    assert_output "0 B"
}

@test "human_bytes: 64 GiB" {
    run human_bytes 68719476736
    assert_output "64.0 GiB"
}

# ── human_mib ────────────────────────────────────────────

@test "human_mib: 0 MiB" {
    run human_mib 0
    assert_output "0 MiB"
}

@test "human_mib: 512 MiB (stays as MiB)" {
    run human_mib 512
    assert_output "512 MiB"
}

@test "human_mib: 1023 MiB (just under GiB threshold)" {
    run human_mib 1023
    assert_output "1023 MiB"
}

@test "human_mib: 1024 MiB = 1.0 GiB" {
    run human_mib 1024
    assert_output "1.0 GiB"
}

@test "human_mib: 60416 MiB (recommended GTT for 64GB system)" {
    run human_mib 60416
    assert_output "59.0 GiB"
}

@test "human_mib: 61440 MiB = 60.0 GiB" {
    run human_mib 61440
    assert_output "60.0 GiB"
}

@test "human_mib: empty argument defaults to 0" {
    run human_mib ""
    assert_output "0 MiB"
}