Завершить инженерный кандидат Stage 5

app/src/test/java/com/projectsacrifice/game/DeterministicInputTapeTest.java

@@ -0,0 +1,69 @@
+package com.projectsacrifice.game;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+
+import org.junit.Test;
+
+public final class DeterministicInputTapeTest {
+    @Test
+    public void oneRecordedCommandTapeReplaysToTheSameTerminalSignature() {
+        DeterministicInputTape tape = DeterministicInputTape.builder(2)
+                .record(false, true, false, 16L)
+                .record(false, true, true, 32L)
+                .record(false, false, false, 16L)
+                .build();
+
+        FakeTarget first = new FakeTarget();
+        FakeTarget second = new FakeTarget();
+
+        assertEquals(tape.play(first), tape.play(second));
+        assertEquals("level=2;ticks=64;mask=0", first.terminalSignature());
+        assertEquals(3, tape.commands().size());
+    }
+
+    @Test
+    public void tapeIdIsStableButChangesWithCommands() {
+        DeterministicInputTape first = DeterministicInputTape.builder(1)
+                .record(false, true, false, 16L).build();
+        DeterministicInputTape same = DeterministicInputTape.builder(1)
+                .record(false, true, false, 16L).build();
+        DeterministicInputTape changed = DeterministicInputTape.builder(1)
+                .record(false, true, true, 16L).build();
+
+        assertEquals(first.id(), same.id());
+        assertNotEquals(first.id(), changed.id());
+    }
+
+    @Test
+    public void terminalStateSignatureIncludesPuzzleBytesAndCompletionFlags() {
+        byte[] puzzle = {4, 8, 15, 16, 23, 42};
+
+        assertEquals(ReplayStateSignature.of(puzzle, true, false),
+                ReplayStateSignature.of(puzzle, true, false));
+        assertNotEquals(ReplayStateSignature.of(puzzle, true, false),
+                ReplayStateSignature.of(puzzle, false, false));
+    }
+
+    private static final class FakeTarget implements DeterministicInputTape.Target {
+        private int level;
+        private long ticks;
+        private int mask;
+
+        @Override
+        public void startLevel(int oneBasedLevelNumber) { level = oneBasedLevelNumber; }
+
+        @Override
+        public void setInput(boolean left, boolean right, boolean jump) {
+            mask = (left ? 1 : 0) | (right ? 2 : 0) | (jump ? 4 : 0);
+        }
+
+        @Override
+        public void advance(long milliseconds) { ticks += milliseconds; }
+
+        @Override
+        public String terminalSignature() {
+            return "level=" + level + ";ticks=" + ticks + ";mask=" + mask;
+        }
+    }
+}