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var traverse = require("../lib").default;
var assert = require("assert");
var _ = require("lodash");
suite("traverse", function () {
var ast = {
type: "Program",
body: [
{
"type": "VariableDeclaration",
"declarations": [
{
"type": "VariableDeclarator",
"id": {
"type": "Identifier",
"name": "foo",
},
"init": {
"type": "StringLiteral",
"value": "bar",
"raw": "\'bar\'"
}
}
],
"kind": "var"
},
{
"type": "ExpressionStatement",
"expression": {
"type": "AssignmentExpression",
"operator": "=",
"left": {
"type": "MemberExpression",
"computed": false,
"object": {
"type": "ThisExpression"
},
"property": {
"type": "Identifier",
"name": "test"
}
},
"right": {
"type": "StringLiteral",
"value": "wow",
"raw": "\'wow\'"
}
}
}
]
};
var body = ast.body;
test("traverse replace", function () {
var replacement = {
type: "StringLiteral",
value: "foo"
};
var ast2 = _.cloneDeep(ast);
traverse(ast2, {
enter: function (path) {
if (path.node.type === "ThisExpression") path.replaceWith(replacement);
}
});
assert.equal(ast2.body[1].expression.left.object, replacement);
});
test("traverse", function () {
var expect = [
body[0], body[0].declarations[0], body[0].declarations[0].id, body[0].declarations[0].init,
body[1], body[1].expression, body[1].expression.left, body[1].expression.left.object, body[1].expression.left.property, body[1].expression.right
];
var actual = [];
traverse(ast, {
enter: function (path) {
actual.push(path.node);
}
});
assert.deepEqual(actual, expect);
});
test("traverse falsy parent", function () {
traverse(null, {
enter: function () {
throw new Error("should not be ran");
}
});
});
test("traverse blacklistTypes", function () {
var expect = [
body[0], body[0].declarations[0], body[0].declarations[0].id, body[0].declarations[0].init,
body[1], body[1].expression, body[1].expression.right
];
var actual = [];
traverse(ast, {
blacklist: ["MemberExpression"],
enter: function (path) {
actual.push(path.node);
}
});
assert.deepEqual(actual, expect);
});
test("hasType", function () {
assert.ok(traverse.hasType(ast, null, "ThisExpression"));
assert.ok(!traverse.hasType(ast, null, "ThisExpression", ["AssignmentExpression"]));
assert.ok(traverse.hasType(ast, null, "ThisExpression"));
assert.ok(traverse.hasType(ast, null, "Program"));
assert.ok(!traverse.hasType(ast, null, "ThisExpression", ["MemberExpression"]));
assert.ok(!traverse.hasType(ast, null, "ThisExpression", ["Program"]));
assert.ok(!traverse.hasType(ast, null, "ArrowFunctionExpression"));
});
});