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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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/*

 * @summary Test of forward referencing of snippets.

 * @build KullaTesting TestingInputStream

 * @run testng ForwardReferenceTest

 */

import java.util.List;

import jdk.jshell.Snippet;

import jdk.jshell.MethodSnippet;

import jdk.jshell.VarSnippet;

import jdk.jshell.DeclarationSnippet;

import org.testng.annotations.Test;

import jdk.jshell.SnippetEvent;

import jdk.jshell.UnresolvedReferenceException;

import static org.testng.Assert.assertEquals;

import static jdk.jshell.Snippet.Status.*;

import static org.testng.Assert.assertTrue;

@Test

public class ForwardReferenceTest extends KullaTesting {

    public void testOverwriteMethodForwardReferenceClass() {

        Snippet k1 = methodKey(assertEval("int q(Boo b) { return b.x; }",

                added(RECOVERABLE_NOT_DEFINED)));

        assertUnresolvedDependencies1((MethodSnippet) k1, RECOVERABLE_NOT_DEFINED, "class Boo");

        assertEval("class Boo { int x = 55; }",

                added(VALID),

                ste(k1, RECOVERABLE_NOT_DEFINED, VALID, true, null));

        assertMethodDeclSnippet((MethodSnippet) k1, "q", "(Boo)int", VALID, 0, 0);

        assertEval("q(new Boo());", "55");

        assertActiveKeys();

    }

    public void testOverwriteMethodForwardReferenceClassImport() {

        MethodSnippet k1 = methodKey(assertEval("int ff(List lis) { return lis.size(); }",

                added(RECOVERABLE_NOT_DEFINED)));

        assertUnresolvedDependencies1(k1, RECOVERABLE_NOT_DEFINED, "class List");

        assertEval("import java.util.*;",

                added(VALID),

                ste(k1, RECOVERABLE_NOT_DEFINED, VALID, true, null));

        assertMethodDeclSnippet(k1, "ff", "(List)int", VALID, 0, 0);

        assertEval("ff(new ArrayList());", "0");

        assertActiveKeys();

    }

    public void testForwardVarToMethod() {

        DeclarationSnippet t = methodKey(assertEval("int t() { return x; }", added(RECOVERABLE_DEFINED)));

        assertUnresolvedDependencies1(t, RECOVERABLE_DEFINED, "variable x");

        assertEvalUnresolvedException("t();", "t", 1, 0);

        Snippet x = varKey(assertEval("int x = 33;", "33",

                added(VALID),

                ste(t, RECOVERABLE_DEFINED, VALID, false, null)));

        assertEval("t();", "33");

        assertEval("double x = 0.88;",

                "0.88", null,

                DiagCheck.DIAG_OK,

                DiagCheck.DIAG_ERROR,

                ste(MAIN_SNIPPET, VALID, VALID, true, null),

                ste(x, VALID, OVERWRITTEN, false, MAIN_SNIPPET),

                ste(t, VALID, RECOVERABLE_DEFINED, false, MAIN_SNIPPET));

        assertEvalUnresolvedException("t();", "t", 0, 1);

        assertActiveKeys();

    }

    public void testForwardMethodToMethod() {

        Snippet t = methodKey(assertEval("int t() { return f(); }", added(RECOVERABLE_DEFINED)));

        Snippet f = methodKey(assertEval("int f() { return g(); }",

                added(RECOVERABLE_DEFINED),

                ste(t, RECOVERABLE_DEFINED, VALID, false, null)));

        assertUnresolvedDependencies1((DeclarationSnippet) f, RECOVERABLE_DEFINED, "method g()");

        assertEvalUnresolvedException("t();", "f", 1, 0);

        Snippet g = methodKey(assertEval("int g() { return 55; }",

                added(VALID),

                ste(f, RECOVERABLE_DEFINED, VALID, false, null)));

        assertEval("t();", "55");

        assertEval("double g() { return 3.14159; }",

                DiagCheck.DIAG_OK,

                DiagCheck.DIAG_ERROR,

                ste(MAIN_SNIPPET, VALID, VALID, true, null),

                ste(g, VALID, OVERWRITTEN, false, MAIN_SNIPPET),

                ste(f, VALID, RECOVERABLE_DEFINED, false, MAIN_SNIPPET));

        DeclarationSnippet exsn = assertEvalUnresolvedException("t();", "f", 0, 1);

        assertTrue(exsn == f, "Identity must not change");

        assertActiveKeys();

    }

    public void testForwardClassToMethod() {

        DeclarationSnippet t = methodKey(assertEval("int t() { return new A().f(); }", added(RECOVERABLE_DEFINED)));

        assertUnresolvedDependencies1(t, RECOVERABLE_DEFINED, "class A");

        assertEvalUnresolvedException("t();", "t", 1, 0);

        Snippet a = classKey(assertEval(

                "class A {\n" +

                        "   int f() { return 10; }\n" +

                "}",

                added(VALID),

                ste(t, RECOVERABLE_DEFINED, VALID, false, null)));

        assertEval("t();", "10");

        assertEval(

                "class A {\n" +

                "   double f() { return 88.0; }\n" +

                "}",

                DiagCheck.DIAG_OK,

                DiagCheck.DIAG_ERROR,

                ste(MAIN_SNIPPET, VALID, VALID, true, null),

                ste(a, VALID, OVERWRITTEN, false, MAIN_SNIPPET),

                ste(t, VALID, RECOVERABLE_DEFINED, false, MAIN_SNIPPET));

        assertEvalUnresolvedException("t();", "t", 0, 1);

        assertActiveKeys();

    }

    public void testForwardVarToClass() {

        DeclarationSnippet a = classKey(assertEval("class A { int f() { return g; } }", added(RECOVERABLE_DEFINED)));

        assertUnresolvedDependencies1(a, RECOVERABLE_DEFINED, "variable g");

        Snippet g = varKey(assertEval("int g = 10;", "10",

                added(VALID),

                ste(a, RECOVERABLE_DEFINED, VALID, false, null)));

        assertEval("new A().f();", "10");

        assertEval("double g = 10;", "10.0", null,

                DiagCheck.DIAG_OK,

                DiagCheck.DIAG_ERROR,

                ste(MAIN_SNIPPET, VALID, VALID, true, null),

                ste(g, VALID, OVERWRITTEN, false, MAIN_SNIPPET),

                ste(a, VALID, RECOVERABLE_DEFINED, false, MAIN_SNIPPET));

        assertUnresolvedDependencies(a, 0);

        assertActiveKeys();

    }

    public void testForwardVarToClassGeneric() {

        DeclarationSnippet a = classKey(assertEval("class A<T> { final T x; A(T v) { this.x = v; } ; T get() { return x; } int core() { return g; } }", added(RECOVERABLE_DEFINED)));

        assertUnresolvedDependencies1(a, RECOVERABLE_DEFINED, "variable g");

        List<SnippetEvent> events = assertEval("A<String> as = new A<>(\"hi\");", null,

                UnresolvedReferenceException.class, DiagCheck.DIAG_OK, DiagCheck.DIAG_OK, null);

        SnippetEvent ste = events.get(0);

        Snippet assn = ste.snippet();

        DeclarationSnippet unsn = ((UnresolvedReferenceException) ste.exception()).getSnippet();

        assertEquals(unsn.name(), "A", "Wrong with unresolved");

        assertEquals(getState().unresolvedDependencies(unsn).count(), 1, "Wrong size unresolved");

        assertEquals(getState().diagnostics(unsn).count(), 0L, "Expected no diagnostics");

        Snippet g = varKey(assertEval("int g = 10;", "10",

                added(VALID),

                ste(a, RECOVERABLE_DEFINED, VALID, false, MAIN_SNIPPET)));

        assertEval("A<String> as = new A<>(\"low\");",

                ste(MAIN_SNIPPET, VALID, VALID, false, null),

                ste(assn, VALID, OVERWRITTEN, false, MAIN_SNIPPET));

        assertEval("as.get();", "\"low\"");

        assertUnresolvedDependencies(a, 0);

        assertActiveKeys();

    }

   public void testForwardVarToClassExtendsImplements() {

        DeclarationSnippet ik = classKey(assertEval("interface I { default int ii() { return 1; } }", added(VALID)));

        DeclarationSnippet jk = classKey(assertEval("interface J { default int jj() { return 2; } }", added(VALID)));

        DeclarationSnippet ck = classKey(assertEval("class C { int cc() { return 3; } }", added(VALID)));

        DeclarationSnippet dk = classKey(assertEval("class D extends C implements I,J { int dd() { return g; } }", added(RECOVERABLE_DEFINED)));

        DeclarationSnippet ek = classKey(assertEval("class E extends D { int ee() { return 5; } }", added(VALID)));

        assertUnresolvedDependencies1(dk, RECOVERABLE_DEFINED, "variable g");

        assertEvalUnresolvedException("new D();", "D", 1, 0);

        assertEvalUnresolvedException("new E();", "D", 1, 0);

        VarSnippet g = varKey(assertEval("int g = 10;", "10",

                added(VALID),

                ste(dk, RECOVERABLE_DEFINED, VALID, false, MAIN_SNIPPET)));

        assertEval("E e = new E();");

        assertDrop(g,

                ste(g, VALID, DROPPED, true, null),

                ste(dk, VALID, RECOVERABLE_DEFINED, false, g));

        assertEvalUnresolvedException("new D();", "D", 1, 0);

        assertEvalUnresolvedException("new E();", "D", 1, 0);

        assertEval("e.ee();", "5");

        assertEvalUnresolvedException("e.dd();", "D", 1, 0);

        assertEval("e.cc();", "3");

        assertEval("e.jj();", "2");

        assertEval("e.ii();", "1");

        assertActiveKeys();

    }

    public void testForwardVarToInterface() {

        DeclarationSnippet i = classKey(assertEval("interface I { default int f() { return x; } }", added(RECOVERABLE_DEFINED)));

        assertUnresolvedDependencies1(i, RECOVERABLE_DEFINED, "variable x");

        DeclarationSnippet c = classKey(assertEval("class C implements I { int z() { return 2; } }", added(VALID)));

        assertEval("C c = new C();");

        assertEval("c.z();", "2");

        assertEvalUnresolvedException("c.f()", "I", 1, 0);

        Snippet g = varKey(assertEval("int x = 55;", "55",

                added(VALID),

                ste(i, RECOVERABLE_DEFINED, VALID, false, null)));

        assertEval("c.f();", "55");

        assertUnresolvedDependencies(i, 0);

        assertActiveKeys();

    }

    public void testForwardVarToEnum() {

        DeclarationSnippet a = classKey(assertEval("enum E { Q, W, E; float ff() { return fff; } }", added(RECOVERABLE_DEFINED)));

        assertUnresolvedDependencies1(a, RECOVERABLE_DEFINED, "variable fff");

        Snippet g = varKey(assertEval("float fff = 4.5f;", "4.5",

                added(VALID),

                ste(a, RECOVERABLE_DEFINED, VALID, false, null)));

        assertEval("E.Q.ff();", "4.5");

        assertEval("double fff = 3.3;", "3.3", null,

                DiagCheck.DIAG_OK,

                DiagCheck.DIAG_ERROR,

                ste(MAIN_SNIPPET, VALID, VALID, true, null),

                ste(g, VALID, OVERWRITTEN, false, MAIN_SNIPPET),

                ste(a, VALID, RECOVERABLE_DEFINED, false, MAIN_SNIPPET));

        assertUnresolvedDependencies(a, 0);

        assertActiveKeys();

    }

    public void testForwardMethodToClass() {

        DeclarationSnippet a = classKey(assertEval("class A { int f() { return g(); } }", added(RECOVERABLE_DEFINED)));

        assertUnresolvedDependencies1(a, RECOVERABLE_DEFINED, "method g()");

        assertEval("A foo() { return null; }");

        assertEvalUnresolvedException("new A();", "A", 1, 0);

        Snippet g = methodKey(assertEval("int g() { return 10; }",

                added(VALID),

                ste(a, RECOVERABLE_DEFINED, VALID, false, null)));

        assertEval("new A().f();", "10");

        assertEval("double g() { return 10; }",

                DiagCheck.DIAG_OK,

                DiagCheck.DIAG_ERROR,

                ste(MAIN_SNIPPET, VALID, VALID, true, null),

                ste(g, VALID, OVERWRITTEN, false, MAIN_SNIPPET),

                ste(a, VALID, RECOVERABLE_DEFINED, false, MAIN_SNIPPET));

        assertUnresolvedDependencies(a, 0);

        assertActiveKeys();

    }

    public void testForwardClassToClass1() {

        Snippet a = classKey(assertEval("class A { B b = new B(); }", added(RECOVERABLE_NOT_DEFINED)));

        assertDeclareFail("new A().b;", "compiler.err.cant.resolve.location");

        Snippet b = classKey(assertEval("class B { public String toString() { return \"B\"; } }",

                added(VALID),

                ste(a, RECOVERABLE_NOT_DEFINED, VALID, true, null)));

        assertEval("new A().b;", "B");

        assertEval("interface B { }",

                DiagCheck.DIAG_OK,

                DiagCheck.DIAG_ERROR,

                ste(MAIN_SNIPPET, VALID, VALID, true, null),

                ste(b, VALID, OVERWRITTEN, false, MAIN_SNIPPET),

                ste(a, VALID, RECOVERABLE_DEFINED, true, MAIN_SNIPPET));

        assertEvalUnresolvedException("new A().b;", "A", 0, 1);

        assertActiveKeys();

    }

    public void testForwardClassToClass2() {

        Snippet a = classKey(assertEval("class A extends B { }", added(RECOVERABLE_NOT_DEFINED)));

        assertDeclareFail("new A();", "compiler.err.cant.resolve.location");

        Snippet b = classKey(assertEval("class B { public String toString() { return \"B\"; } }",

                added(VALID),

                ste(a, RECOVERABLE_NOT_DEFINED, VALID, true, null)));

        assertEval("new A();", "B");

        assertEval("interface B { }",

                DiagCheck.DIAG_OK,

                DiagCheck.DIAG_ERROR,

                ste(MAIN_SNIPPET, VALID, VALID, true, null),

                ste(b, VALID, OVERWRITTEN, false, MAIN_SNIPPET),

                ste(a, VALID, RECOVERABLE_NOT_DEFINED, true, MAIN_SNIPPET));

        assertDeclareFail("new A();", "compiler.err.cant.resolve.location");

        assertActiveKeys();

    }

    public void testForwardClassToClass3() {

        Snippet a = classKey(assertEval("interface A extends B { static int f() { return 10; } }", added(RECOVERABLE_NOT_DEFINED)));

        assertDeclareFail("A.f();", "compiler.err.cant.resolve.location");

        Snippet b = classKey(assertEval("interface B { }",

                added(VALID),

                ste(a, RECOVERABLE_NOT_DEFINED, VALID, true, null)));

        assertEval("A.f();", "10");

        assertEval("class B { }",

                DiagCheck.DIAG_OK,

                DiagCheck.DIAG_ERROR,

                ste(MAIN_SNIPPET, VALID, VALID, true, null),

                ste(b, VALID, OVERWRITTEN, false, MAIN_SNIPPET),

                ste(a, VALID, RECOVERABLE_NOT_DEFINED, true, MAIN_SNIPPET));

        assertDeclareFail("A.f();", "compiler.err.cant.resolve.location");

        assertActiveKeys();

    }

    public void testForwardVariable() {

        assertEval("int f() { return x; }", added(RECOVERABLE_DEFINED));

        assertEvalUnresolvedException("f();", "f", 1, 0);

        assertActiveKeys();

    }

    public void testLocalClassInUnresolved() {

        Snippet f = methodKey(assertEval("void f() { class A {} g(); }", added(RECOVERABLE_DEFINED)));

        assertEval("void g() {}",

                added(VALID),

        assertEval("f();", "");

    }

}