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// Copyright 2023 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 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.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package cnf_test
import (
"testing"
"dawn.googlesource.com/dawn/tools/src/cnf"
"github.com/google/go-cmp/cmp"
)
func TestDecompose(t *testing.T) {
for _, test := range []struct {
in string
expect cnf.Decomposed
}{
{
in: ``,
expect: cnf.Decomposed{},
},
{
in: `X`,
expect: cnf.Decomposed{
Unarys: []cnf.Unary{T("X")},
},
},
{
in: `X || Y`,
expect: cnf.Decomposed{
Ors: []cnf.Ors{{T("X"), T("Y")}},
Unarys: []cnf.Unary{T("X"), T("Y")},
},
},
{
in: `!X || Y`,
expect: cnf.Decomposed{
Ors: []cnf.Ors{{F("X"), T("Y")}},
Unarys: []cnf.Unary{F("X"), T("Y")},
},
},
{
in: `X || !Y`,
expect: cnf.Decomposed{
Ors: []cnf.Ors{{T("X"), F("Y")}},
Unarys: []cnf.Unary{T("X"), F("Y")},
},
},
{
in: `X || Y || Z`,
expect: cnf.Decomposed{
Ors: []cnf.Ors{{T("X"), T("Y"), T("Z")}},
Unarys: []cnf.Unary{T("X"), T("Y"), T("Z")},
},
},
{
in: `(X || Y) && Z`,
expect: cnf.Decomposed{
Ands: []cnf.Ands{{{T("X"), T("Y")}, {T("Z")}}},
Ors: []cnf.Ors{{T("X"), T("Y")}},
Unarys: []cnf.Unary{T("X"), T("Y"), T("Z")},
},
},
{
in: `(X || Y) && (X || Y)`,
expect: cnf.Decomposed{
Ands: []cnf.Ands{{{T("X"), T("Y")}, {T("X"), T("Y")}}},
Ors: []cnf.Ors{{T("X"), T("Y")}},
Unarys: []cnf.Unary{T("X"), T("Y")},
},
},
} {
expr, err := cnf.Parse(test.in)
if err != nil {
t.Errorf(`unexpected error returned from Parse('%v'): %v`, test.in, err)
continue
}
got := cnf.Decompose(expr)
if diff := cmp.Diff(test.expect, got); diff != "" {
t.Errorf("Decompose('%v') returned '%v'. Diff:\n%v", test.in, got, diff)
}
}
}