keep_comparisons: {
    options = {
        comparisons: true,
        unsafe_comps: false
    }
    input: {
        var obj1 = {
            valueOf: function() {triggeredFirst();}
        }
        var obj2 = {
            valueOf: function() {triggeredSecond();}
        }
        var result1 = obj1 <= obj2;
        var result2 = obj1 <  obj2;
        var result3 = obj1 >= obj2;
        var result4 = obj1 >  obj2;
    }
    expect: {
        var obj1 = {
            valueOf: function() {triggeredFirst();}
        }
        var obj2 = {
            valueOf: function() {triggeredSecond();}
        }
        var result1 = obj1 <= obj2;
        var result2 = obj1 <  obj2;
        var result3 = obj1 >= obj2;
        var result4 = obj1 >  obj2;
    }
}

keep_comparisons_with_unsafe_comps: {
    options = {
        comparisons: true,
        unsafe_comps: true
    }
    input: {
        var obj1 = {
            valueOf: function() {triggeredFirst();}
        }
        var obj2 = {
            valueOf: function() {triggeredSecond();}
        }
        var result1 = obj1 <= obj2;
        var result2 = obj1 <  obj2;
        var result3 = obj1 >= obj2;
        var result4 = obj1 >  obj2;
    }
    expect: {
        var obj1 = {
            valueOf: function() {triggeredFirst();}
        }
        var obj2 = {
            valueOf: function() {triggeredSecond();}
        }
        var result1 = obj2 >= obj1;
        var result2 = obj2 >  obj1;
        var result3 = obj1 >= obj2;
        var result4 = obj1 >  obj2;
    }
}

dont_change_in_or_instanceof_expressions: {
    input: {
        1 in 1;
        null in null;
        1 instanceof 1;
        null instanceof null;
    }
    expect: {
        1 in 1;
        null in null;
        1 instanceof 1;
        null instanceof null;
    }
}

self_comparison_1: {
    options = {
        comparisons: true,
    }
    input: {
        a === a;
        a !== b;
        b.c === a.c;
        b.c !== b.c;
    }
    expect: {
        a == a;
        a !== b;
        b.c === a.c;
        b.c != b.c;
    }
}

self_comparison_2: {
    options = {
        comparisons: true,
        reduce_funcs: true,
        reduce_vars: true,
        toplevel: true,
    }
    input: {
        function f() {}
        var o = {};
        console.log(f != f, o === o);
    }
    expect: {
        function f() {}
        var o = {};
        console.log(false, true);
    }
    expect_stdout: "false true"
}

issue_2857_1: {
    options = {
        comparisons: true,
    }
    input: {
        function f1(a) {
            a === undefined || a === null;
            a === undefined || a !== null;
            a !== undefined || a === null;
            a !== undefined || a !== null;
            a === undefined && a === null;
            a === undefined && a !== null;
            a !== undefined && a === null;
            a !== undefined && a !== null;
        }
        function f2(a) {
            a === null || a === undefined;
            a === null || a !== undefined;
            a !== null || a === undefined;
            a !== null || a !== undefined;
            a === null && a === undefined;
            a === null && a !== undefined;
            a !== null && a === undefined;
            a !== null && a !== undefined;
        }
    }
    expect: {
        function f1(a) {
            null == a;
            void 0 === a || null !== a;
            void 0 !== a || null === a;
            void 0 !== a || null !== a;
            void 0 === a && null === a;
            void 0 === a && null !== a;
            void 0 !== a && null === a;
            null != a;
        }
        function f2(a) {
            null == a;
            null === a || void 0 !== a;
            null !== a || void 0 === a;
            null !== a || void 0 !== a;
            null === a && void 0 === a;
            null === a && void 0 !== a;
            null !== a && void 0 === a;
            null != a;
        }
    }
}

issue_2857_2: {
    options = {
        comparisons: true,
    }
    input: {
        function f(a, p) {
            a === undefined || a === null || p;
            a === undefined || a !== null || p;
            a !== undefined || a === null || p;
            a !== undefined || a !== null || p;
            a === undefined && a === null || p;
            a === undefined && a !== null || p;
            a !== undefined && a === null || p;
            a !== undefined && a !== null || p;
        }
    }
    expect: {
        function f(a, p) {
            null == a || p;
            void 0 === a || null !== a || p;
            void 0 !== a || null === a || p;
            void 0 !== a || null !== a || p;
            void 0 === a && null === a || p;
            void 0 === a && null !== a || p;
            void 0 !== a && null === a || p;
            null != a || p;
        }
    }
}

issue_2857_3: {
    options = {
        comparisons: true,
    }
    input: {
        function f(a, p) {
            a === undefined || a === null && p;
            a === undefined || a !== null && p;
            a !== undefined || a === null && p;
            a !== undefined || a !== null && p;
            a === undefined && a === null && p;
            a === undefined && a !== null && p;
            a !== undefined && a === null && p;
            a !== undefined && a !== null && p;
        }
    }
    expect: {
        function f(a, p) {
            void 0 === a || null === a && p;
            void 0 === a || null !== a && p;
            void 0 !== a || null === a && p;
            void 0 !== a || null !== a && p;
            void 0 === a && null === a && p;
            void 0 === a && null !== a && p;
            void 0 !== a && null === a && p;
            null != a && p;
        }
    }
}

issue_2857_4: {
    options = {
        comparisons: true,
    }
    input: {
        function f(a, p) {
            p || a === undefined || a === null;
            p || a === undefined || a !== null;
            p || a !== undefined || a === null;
            p || a !== undefined || a !== null;
            p || a === undefined && a === null;
            p || a === undefined && a !== null;
            p || a !== undefined && a === null;
            p || a !== undefined && a !== null;
        }
    }
    expect: {
        function f(a, p) {
            p || null == a;
            p || void 0 === a || null !== a;
            p || void 0 !== a || null === a;
            p || void 0 !== a || null !== a;
            p || void 0 === a && null === a;
            p || void 0 === a && null !== a;
            p || void 0 !== a && null === a;
            p || null != a;
        }
    }
}

issue_2857_5: {
    options = {
        comparisons: true,
    }
    input: {
        function f(a, p) {
            p && a === undefined || a === null;
            p && a === undefined || a !== null;
            p && a !== undefined || a === null;
            p && a !== undefined || a !== null;
            p && a === undefined && a === null;
            p && a === undefined && a !== null;
            p && a !== undefined && a === null;
            p && a !== undefined && a !== null;
        }
    }
    expect: {
        function f(a, p) {
            p && void 0 === a || null === a;
            p && void 0 === a || null !== a;
            p && void 0 !== a || null === a;
            p && void 0 !== a || null !== a;
            p && void 0 === a && null === a;
            p && void 0 === a && null !== a;
            p && void 0 !== a && null === a;
            p && null != a;
        }
    }
}

issue_2857_6: {
    options = {
        comparisons: true,
        pure_getters: "strict",
        reduce_vars: true,
    }
    input: {
        function f(a) {
            if (({}).b === undefined || {}.b === null)
                return a.b !== undefined && a.b !== null;
        }
        console.log(f({
            a: [ null ],
            get b() {
                return this.a.shift();
            }
        }));
    }
    expect: {
        function f(a) {
            if (null == {}.b)
                return void 0 !== a.b && null !== a.b;
        }
        console.log(f({
            a: [ null ],
            get b() {
                return this.a.shift();
            }
        }));
    }
    expect_stdout: "true"
}