tests: add test for 1t pulse gen using comparator

tests/timings.rs

@@ -1,7 +1,8 @@
 mod common;
 use common::*;
 
-use mchprs_blocks::{blocks::ComparatorMode, BlockDirection};
+use mchprs_blocks::blocks::{Block, ComparatorMode};
+use mchprs_blocks::BlockDirection;
 
 test_all_backends!(repeater_t_flip_flop);
 fn repeater_t_flip_flop(backend: TestBackend) {
@@ -75,4 +76,33 @@ fn pulse_gen_2t(backend: TestBackend) {
 }
 
 test_all_backends!(pulse_gen_1t);
-fn pulse_gen_1t(backend: TestBackend) {}
+fn pulse_gen_1t(backend: TestBackend) {
+    let output_pos = pos(5, 1, 1);
+    let lever_pos = pos(0, 1, 1);
+
+    let mut world = TestWorld::new(1);
+
+    make_wire(&mut world, pos(1, 1, 0));
+    make_repeater(&mut world, pos(2, 1, 0), 2, BlockDirection::West);
+    make_wire(&mut world, pos(3, 1, 0));
+    make_wire(&mut world, pos(4, 1, 0));
+
+    make_lever(&mut world, lever_pos);
+    make_wire(&mut world, pos(1, 1, 1));
+    make_wire(&mut world, pos(2, 1, 1));
+    make_comparator(
+        &mut world,
+        pos(3, 1, 1),
+        ComparatorMode::Subtract,
+        BlockDirection::West,
+    );
+    place_on_block(&mut world, pos(4, 1, 1), Block::Sandstone {});
+    place_on_block(&mut world, output_pos, trapdoor());
+
+    let mut runner = BackendRunner::new(world, backend);
+
+    runner.use_block(lever_pos);
+    runner.check_powered_for(output_pos, false, 1);
+    runner.check_powered_for(output_pos, true, 1);
+    runner.check_powered_for(output_pos, false, 10);
+}