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 * Copyright (c) 2017, 2021, Oracle and/or its affiliates.
 * Copyright (c) 2013, Regents of the University of California
 *
 * All rights reserved.
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 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
 * with the distribution.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
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package com.oracle.graal.python.test.generator;

import static com.oracle.graal.python.test.PythonTests.assertPrints;

import org.junit.Test;

public class GeneratorExpressionTests {

    @Test
    public void simple() {
        String source = "genexp = (x*2 for x in range(5))\n" + //
                        "for i in genexp:\n" + //
                        "    print(i)\n" + //
                        "\n";

        assertPrints("0\n2\n4\n6\n8\n", source);
    }

    @Test
    public void withCondition() {
        String source = "genexp = (x*2 for x in range(5) if x != 2)\n" + //
                        "for i in genexp:\n" + //
                        "    print(i)\n" + //
                        "\n";

        assertPrints("0\n2\n6\n8\n", source);
    }

    @Test
    public void nested() {
        String source = "genexp = (x+y for x in range(5) for y in range(3))\n" + //
                        "for i in genexp:\n" + //
                        "    print(i)\n" + //
                        "\n";

        assertPrints("0\n1\n2\n1\n2\n3\n2\n3\n4\n3\n4\n5\n4\n5\n6\n", source);
    }

    @Test
    public void generatorWithListComp() {
        String source = "genexp = (x*2 for x in range(5))\n" + //
                        "listcomp = [y for y in genexp]\n" + //
                        "for i in listcomp:\n" + //
                        "    print(i)\n" + //
                        "\n";

        assertPrints("0\n2\n4\n6\n8\n", source);
    }

    @Test
    public void generatorexpTest() {
        String source = "ge = ((x,y) for x in range(3) for y in range(4))\n" + //
                        "lc = [x for x in ge]\n" + //
                        "print(lc)";

        assertPrints("[(0, 0), (0, 1), (0, 2), (0, 3), (1, 0), (1, 1), (1, 2), (1, 3), (2, 0), (2, 1), (2, 2), (2, 3)]\n", source);
    }

}
