119 lines
2.6 KiB
Rust
119 lines
2.6 KiB
Rust
use super::harness::*;
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#[test]
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fn rand_in_range() {
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let f = forth_seeded(12345);
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f.evaluate("0 10 rand", &default_ctx()).unwrap();
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let val = stack_float(&f);
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assert!(val >= 0.0 && val < 10.0, "rand {} not in [0, 10)", val);
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}
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#[test]
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fn rand_deterministic() {
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let f1 = forth_seeded(99);
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let f2 = forth_seeded(99);
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f1.evaluate("0 100 rand", &default_ctx()).unwrap();
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f2.evaluate("0 100 rand", &default_ctx()).unwrap();
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assert_eq!(f1.stack(), f2.stack());
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}
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#[test]
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fn rrand_inclusive() {
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let f = forth_seeded(42);
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for _ in 0..20 {
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f.clear_stack();
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f.evaluate("1 3 rrand", &default_ctx()).unwrap();
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let val = stack_int(&f);
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assert!(val >= 1 && val <= 3, "rrand {} not in [1, 3]", val);
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}
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}
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#[test]
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fn seed_resets() {
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let f1 = forth_seeded(1);
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f1.evaluate("42 seed 0 100 rand", &default_ctx()).unwrap();
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let f2 = forth_seeded(999);
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f2.evaluate("42 seed 0 100 rand", &default_ctx()).unwrap();
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assert_eq!(f1.stack(), f2.stack());
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}
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#[test]
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fn coin_binary() {
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let f = forth_seeded(42);
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f.evaluate("coin", &default_ctx()).unwrap();
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let val = stack_int(&f);
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assert!(val == 0 || val == 1);
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}
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#[test]
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fn chance_zero() {
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// 0.0 probability should never execute the quotation
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let f = run("99 { 42 } 0.0 chance");
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assert_eq!(stack_int(&f), 99); // quotation not executed, 99 still on stack
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}
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#[test]
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fn chance_one() {
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// 1.0 probability should always execute the quotation
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let f = run("{ 42 } 1.0 chance");
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assert_eq!(stack_int(&f), 42);
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}
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#[test]
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fn choose_from_list() {
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let f = forth_seeded(42);
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f.evaluate("10 20 30 3 choose", &default_ctx()).unwrap();
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let val = stack_int(&f);
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assert!(val == 10 || val == 20 || val == 30);
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}
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#[test]
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fn choose_underflow() {
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expect_error("1 2 5 choose", "stack underflow");
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}
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#[test]
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fn cycle_deterministic() {
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for runs in 0..6 {
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let ctx = ctx_with(|c| c.runs = runs);
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let f = run_ctx("10 20 30 3 cycle", &ctx);
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let expected = [10, 20, 30][runs % 3];
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assert_eq!(stack_int(&f), expected, "cycle at runs={}", runs);
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}
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}
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#[test]
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fn cycle_zero_count() {
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expect_error("1 2 3 0 cycle", "cycle count must be > 0");
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}
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#[test]
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fn mtof_a4() {
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expect_float("69 mtof", 440.0);
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}
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#[test]
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fn mtof_octave() {
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expect_float("81 mtof", 880.0);
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}
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#[test]
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fn mtof_c4() {
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expect_floats_close("60 mtof", 261.6255653, 0.001);
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}
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#[test]
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fn ftom_440() {
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expect_float("440 ftom", 69.0);
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}
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#[test]
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fn ftom_880() {
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expect_float("880 ftom", 81.0);
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}
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#[test]
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fn mtof_ftom_roundtrip() {
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expect_float("60 mtof ftom", 60.0);
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}
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