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OptimizerTest.java
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OptimizerTest.java
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package smc.optimizer;
import de.bechte.junit.runners.context.HierarchicalContextRunner;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import smc.OptimizedStateMachine;
import smc.lexer.Lexer;
import smc.parser.Parser;
import smc.parser.SyntaxBuilder;
import smc.semanticAnalyzer.SemanticAnalyzer;
import smc.semanticAnalyzer.SemanticStateMachine;
import static org.hamcrest.Matchers.*;
import static org.hamcrest.core.IsEqual.equalTo;
import static org.junit.Assert.assertThat;
import static smc.Utilities.compressWhiteSpace;
import static smc.parser.ParserEvent.EOF;
@RunWith(HierarchicalContextRunner.class)
public class OptimizerTest {
private Lexer lexer;
private Parser parser;
private SyntaxBuilder builder;
private SemanticAnalyzer analyzer;
private Optimizer optimizer;
private OptimizedStateMachine optimizedStateMachine;
@Before
public void setUp() throws Exception {
builder = new SyntaxBuilder();
parser = new Parser(builder);
lexer = new Lexer(parser);
analyzer = new SemanticAnalyzer();
optimizer = new Optimizer();
}
private OptimizedStateMachine produceStateMachineWithHeader(String s) {
String fsmSyntax = "fsm:f initial:i actions:a " + s;
return produceStateMachine(fsmSyntax);
}
private OptimizedStateMachine produceStateMachine(String fsmSyntax) {
lexer.lex(fsmSyntax);
parser.handleEvent(EOF, -1, -1);
SemanticStateMachine ast = analyzer.analyze(builder.getFsm());
return optimizer.optimize(ast);
}
private void assertOptimization(String syntax, String stateMachine) {
optimizedStateMachine = produceStateMachineWithHeader(syntax);
assertThat(
compressWhiteSpace(optimizedStateMachine.transitionsToString()),
equalTo(compressWhiteSpace(stateMachine)));
}
public class BasicOptimizerFunctions {
@Test
public void header() throws Exception {
OptimizedStateMachine sm = produceStateMachineWithHeader("{i e i -}");
assertThat(sm.header.fsm, equalTo("f"));
assertThat(sm.header.initial, equalTo("i"));
assertThat(sm.header.actions, equalTo("a"));
}
@Test
public void statesArePreserved() throws Exception {
OptimizedStateMachine sm = produceStateMachineWithHeader("{i e s - s e i -}");
assertThat(sm.states, contains("i", "s"));
}
@Test
public void abstractStatesAreRemoved() throws Exception {
OptimizedStateMachine sm = produceStateMachineWithHeader("{(b) - - - i:b e i -}");
assertThat(sm.states, not(hasItems("b")));
}
@Test
public void eventsArePreserved() throws Exception {
OptimizedStateMachine sm = produceStateMachineWithHeader("{i e1 s - s e2 i -}");
assertThat(sm.events, contains("e1", "e2"));
}
@Test
public void actionsArePreserved() throws Exception {
OptimizedStateMachine sm = produceStateMachineWithHeader("{i e1 s a1 s e2 i a2}");
assertThat(sm.actions, contains("a1", "a2"));
}
@Test
public void simpleStateMachine() throws Exception {
assertOptimization(
"" +
"{i e i a1}",
"" +
"i {\n" +
" e i {a1}\n" +
"}\n");
assertThat(optimizedStateMachine.transitions, hasSize(1));
}
} // Basic Optimizer Functions
public class EntryAndExitActions {
@Test
public void entryFunctionsAdded() throws Exception {
assertOptimization(
"" +
"{" +
" i e s a1" +
" i e2 s a2" +
" s <n1 <n2 e i -" +
"}",
"" +
"i {\n" +
" e s {n1 n2 a1}\n" +
" e2 s {n1 n2 a2}\n" +
"}\n" +
"s {\n" +
" e i {}\n" +
"}\n");
}
@Test
public void exitFunctionsAdded() throws Exception {
assertOptimization(
"" +
"{" +
" i >x2 >x1 e s a1" +
" i e2 s a2" +
" s e i -" +
"}",
"" +
"i {\n" +
" e s {x2 x1 a1}\n" +
" e2 s {x2 x1 a2}\n" +
"}\n" +
"s {\n" +
" e i {}\n" +
"}\n");
}
@Test
public void firstSuperStateEntryAndExitActionsAreAdded() throws Exception {
assertOptimization(
"" +
"{" +
" (ib) >ibx1 >ibx2 - - -" +
" (sb) <sbn1 <sbn2 - - -" +
" i:ib >x e s a" +
" s:sb <n e i -" +
"}",
"" +
"i {\n" +
" e s {x ibx1 ibx2 sbn1 sbn2 n a}\n" +
"}\n" +
"s {\n" +
" e i {}\n" +
"}\n");
}
@Test
public void multipleSuperStateEntryAndExitActionsAreAdded() throws Exception {
assertOptimization(
"" +
"{" +
" (ib1) >ib1x - - -" +
" (ib2) : ib1 >ib2x - - -" +
" (sb1) <sb1n- - -" +
" (sb2) :sb1 <sb2n- - -" +
" i:ib2 >x e s a" +
" s:sb2 <n e i -" +
"}",
"" +
"i {\n" +
" e s {x ib2x ib1x sb1n sb2n n a}\n" +
"}\n" +
"s {\n" +
" e i {}\n" +
"}\n");
}
@Test
public void diamondSuperStateEntryAndExitActionsAreAdded() throws Exception {
assertOptimization(
"" +
"{" +
" (ib1) >ib1x - - -" +
" (ib2) : ib1 >ib2x - - -" +
" (ib3) : ib1 >ib3x - - -" +
" (sb1) <sb1n - - -" +
" (sb2) :sb1 <sb2n - - -" +
" (sb3) :sb1 <sb3n - - -" +
" i:ib2 :ib3 >x e s a" +
" s :sb2 :sb3 <n e i -" +
"}",
"" +
"i {\n" +
" e s {x ib3x ib2x ib1x sb1n sb2n sb3n n a}\n" +
"}\n" +
"s {\n" +
" e i {}\n" +
"}\n");
}
} // Entry and Exit Actions
public class superStateTransitions {
@Test
public void simpleInheritanceOfTransitions() throws Exception {
assertOptimization(
"" +
"{" +
" (b) be s ba" +
" i:b e s a" +
" s e i -" +
"}",
"" +
"i {\n" +
" e s {a}\n" +
" be s {ba}\n" +
"}\n" +
"s {\n" +
" e i {}\n" +
"}\n"
);
}
@Test
public void deepInheritanceOfTransitions() throws Exception {
assertOptimization(
"" +
"{" +
" (b1) {" +
" b1e1 s b1a1" +
" b1e2 s b1a2" +
" }" +
" (b2):b1 b2e s b2a" +
" i:b2 e s a" +
" s e i -" +
"}",
"" +
"i {\n" +
" e s {a}\n" +
" b2e s {b2a}\n" +
" b1e1 s {b1a1}\n" +
" b1e2 s {b1a2}\n" +
"}\n" +
"s {\n" +
" e i {}\n" +
"}\n"
);
}
@Test
public void multipleInheritanceOfTransitions() throws Exception {
assertOptimization(
"" +
"{" +
" (b1) b1e s b1a" +
" (b2) b2e s b2a" +
" i:b1 :b2 e s a" +
" s e i -" +
"}",
"" +
"i {\n" +
" e s {a}\n" +
" b2e s {b2a}\n" +
" b1e s {b1a}\n" +
"}\n" +
"s {\n" +
" e i {}\n" +
"}\n"
);
}
@Test
public void diamondInheritanceOfTransitions() throws Exception {
assertOptimization(
"" +
"{" +
" (b) be s ba" +
" (b1):b b1e s b1a" +
" (b2):b b2e s b2a" +
" i:b1 :b2 e s a" +
" s e i -" +
"}",
"" +
"i {\n" +
" e s {a}\n" +
" b2e s {b2a}\n" +
" b1e s {b1a}\n" +
" be s {ba}\n" +
"}\n" +
"s {\n" +
" e i {}\n" +
"}\n"
);
}
@Test
public void overridingTransitions() throws Exception {
assertOptimization(
"" +
"{" +
" (b) e s2 a2" +
" i:b e s a" +
" s e i -" +
" s2 e i -" +
"}",
"" +
"i {\n" +
" e s {a}\n" +
"}\n" +
"s {\n" +
" e i {}\n" +
"}\n" +
"s2 {\n" +
" e i {}\n" +
"}\n"
);
}
@Test
public void eliminationOfDuplicateTransitions() throws Exception {
assertOptimization(
"" +
"{" +
" (b) e s a" +
" i:b e s a" +
" s e i -" +
"}",
"" +
"i {\n" +
" e s {a}\n" +
"}\n" +
"s {\n" +
" e i {}\n" +
"}\n"
);
}
}// Super State Transitions
public class AcceptanceTests {
@Test
public void turnstyle3() throws Exception {
OptimizedStateMachine sm = produceStateMachine(
"" +
"Actions: Turnstile\n" +
"FSM: TwoCoinTurnstile\n" +
"Initial: Locked\n" +
"{" +
" (Base) Reset Locked lock" +
"" +
" Locked : Base {" +
" Pass Alarming -" +
" Coin FirstCoin -" +
" }" +
"" +
" Alarming : Base <alarmOn >alarmOff - - -" +
"" +
" FirstCoin : Base {" +
" Pass Alarming -" +
" Coin Unlocked unlock" +
" }" +
"" +
" Unlocked : Base {" +
" Pass Locked lock" +
" Coin - thankyou" +
"}");
assertThat(sm.toString(), equalTo(
"" +
"Initial: Locked\n" +
"Fsm: TwoCoinTurnstile\n" +
"Actions:Turnstile\n" +
"{\n" +
" Alarming {\n" +
" Reset Locked {alarmOff lock}\n" +
" }\n" +
" FirstCoin {\n" +
" Pass Alarming {alarmOn}\n" +
" Coin Unlocked {unlock}\n" +
" Reset Locked {lock}\n" +
" }\n" +
" Locked {\n" +
" Pass Alarming {alarmOn}\n" +
" Coin FirstCoin {}\n" +
" Reset Locked {lock}\n" +
" }\n" +
" Unlocked {\n" +
" Pass Locked {lock}\n" +
" Coin Unlocked {thankyou}\n" +
" Reset Locked {lock}\n" +
" }\n" +
"}\n"));
}
} // Acceptance Tests
}