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tests.js
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tests.js
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/**
* Copyright 2017 trivago N.V.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import * as t from 'babel-types';
export default {
convert: {
TestEvenExpression: {
exit(path) {
const expr = t.unaryExpression(
'!',
t.binaryExpression(
'%',
path.get('expression').node,
t.numericLiteral(2)
)
);
expr.extra = { parenthesizedArgument: true };
path.replaceWithJS(expr);
},
},
TestOddExpression: {
exit(path) {
const expr = t.unaryExpression(
'!',
t.unaryExpression(
'!',
t.binaryExpression(
'%',
path.get('expression').node,
t.numericLiteral(2)
)
)
);
expr.extra = { parenthesizedArgument: true };
path.replaceWithJS(expr);
},
},
TestDefinedExpression: {
exit(path) {
path.replaceWithJS(
t.binaryExpression(
'!==',
t.unaryExpression(
'typeof',
path.get('expression').node
),
t.stringLiteral('undefined')
)
);
},
},
TestEmptyExpression: {
exit(path) {
path.replaceWithJS(
t.callExpression(
t.identifier(
this.addImportFrom('melody-runtime', 'isEmpty')
),
[path.get('expression').node]
)
);
},
},
TestSameAsExpression: {
exit(path) {
path.replaceWithJS(
t.binaryExpression(
'===',
path.get('expression').node,
path.get('arguments')[0].node
)
);
},
},
TestNullExpression: {
exit(path) {
path.replaceWithJS(
t.binaryExpression(
'===',
path.get('expression').node,
t.nullLiteral()
)
);
},
},
TestDivisibleByExpression: {
exit(path) {
path.replaceWithJS(
t.unaryExpression(
'!',
t.binaryExpression(
'%',
path.get('expression').node,
path.node.arguments[0]
)
)
);
},
},
TestIterableExpression: {
exit(path) {
path.replaceWithJS(
t.callExpression(
t.memberExpression(
t.identifier('Array'),
t.identifier('isArray')
),
[path.node.expression]
)
);
},
},
},
};