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debug-assert.ts
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60 lines (52 loc) · 2.28 KB
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import { AST_NODE_TYPES, TSESTree } from "@typescript-eslint/experimental-utils";
import { createRule } from "./utils";
export = createRule({
name: "debug-assert",
meta: {
docs: {
description: ``,
category: "Possible Errors",
recommended: "error",
},
messages: {
secondArgumentDebugAssertError: `Second argument to 'Debug.assert' should be a string literal`,
thirdArgumentDebugAssertError: `Third argument to 'Debug.assert' should be a string literal or arrow function`,
},
schema: [],
type: "problem",
},
defaultOptions: [],
create(context) {
const isArrowFunction = (node: TSESTree.Node) => node.type === AST_NODE_TYPES.ArrowFunctionExpression;
const isStringLiteral = (node: TSESTree.Node): boolean => (
(node.type === AST_NODE_TYPES.Literal && typeof node.value === "string") || node.type === AST_NODE_TYPES.TemplateLiteral
);
const isDebugAssert = (node: TSESTree.MemberExpression): boolean => (
node.object.type === AST_NODE_TYPES.Identifier
&& node.object.name === "Debug"
&& node.property.type === AST_NODE_TYPES.Identifier
&& node.property.name === "assert"
);
const checkDebugAssert = (node: TSESTree.CallExpression) => {
const args = node.arguments;
const argsLen = args.length;
if (!(node.callee.type === AST_NODE_TYPES.MemberExpression && isDebugAssert(node.callee)) || argsLen < 2) {
return;
}
const message1Node = args[1];
if (message1Node && !isStringLiteral(message1Node)) {
context.report({ messageId: "secondArgumentDebugAssertError", node: message1Node });
}
if (argsLen < 3) {
return;
}
const message2Node = args[2];
if (message2Node && (!isStringLiteral(message2Node) && !isArrowFunction(message2Node))) {
context.report({ messageId: "thirdArgumentDebugAssertError", node: message2Node });
}
};
return {
CallExpression: checkDebugAssert,
};
},
});