Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Fix: Detect nested test cases #249

Merged
merged 8 commits into from
May 16, 2022
Merged
Show file tree
Hide file tree
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
136 changes: 118 additions & 18 deletions lib/utils.js
Original file line number Diff line number Diff line change
Expand Up @@ -377,20 +377,59 @@ module.exports = {
},

/**
* Performs static analysis on an AST to try to find test cases
* Extracts the body of a function if the given node is a function
*
* @param {ASTNode} node
* @returns {ExpressionStatement[]}
*/
extractFunctionBody(node) {
if (
node.type === 'ArrowFunctionExpression' ||
node.type === 'FunctionExpression'
) {
if (node.body.type === 'BlockStatement') {
return node.body.body;
}

return [node.body];
}

return [];
},

/**
* Checks the given statements for possible test info
*
* @param {RuleContext} context The `context` variable for the source file itself
* @param {ASTNode} ast The `Program` node for the file.
* @returns {object} An object with `valid` and `invalid` keys containing a list of AST nodes corresponding to tests
* @param {ASTNode[]} statements The statements to check
* @param {Set<ASTNode>} variableIdentifiers
* @returns {CallExpression[]}
*/
getTestInfo(context, ast) {
checkStatementsForTestInfo(
context,
statements,
variableIdentifiers = new Set()
) {
const runCalls = [];
const variableIdentifiers = new Set();

ast.body.forEach((statement) => {
for (const statement of statements) {
if (statement.type === 'VariableDeclaration') {
statement.declarations.forEach((declarator) => {
for (const declarator of statement.declarations) {
if (!declarator.init) {
continue;
}

const extracted = module.exports.extractFunctionBody(declarator.init);

runCalls.push(
...module.exports.checkStatementsForTestInfo(
context,
extracted,
variableIdentifiers
)
);

if (
declarator.init &&
isRuleTesterConstruction(declarator.init) &&
declarator.id.type === 'Identifier'
) {
Expand All @@ -400,21 +439,82 @@ module.exports = {
.forEach((ref) => variableIdentifiers.add(ref.identifier));
});
}
});
}
}

if (statement.type === 'FunctionDeclaration') {
runCalls.push(
...module.exports.checkStatementsForTestInfo(
context,
statement.body.body,
variableIdentifiers
)
);
}

if (statement.type === 'IfStatement') {
const body =
statement.consequent.type === 'BlockStatement'
? statement.consequent.body
: [statement.consequent];

runCalls.push(
...module.exports.checkStatementsForTestInfo(
context,
body,
variableIdentifiers
)
);

continue;
}

const expression =
statement.type === 'ExpressionStatement'
? statement.expression
: statement;

if (expression.type !== 'CallExpression') {
continue;
}

for (const arg of expression.arguments) {
const extracted = module.exports.extractFunctionBody(arg);

runCalls.push(
...module.exports.checkStatementsForTestInfo(
context,
extracted,
variableIdentifiers
)
);
}

if (
statement.type === 'ExpressionStatement' &&
statement.expression.type === 'CallExpression' &&
statement.expression.callee.type === 'MemberExpression' &&
(isRuleTesterConstruction(statement.expression.callee.object) ||
variableIdentifiers.has(statement.expression.callee.object)) &&
statement.expression.callee.property.type === 'Identifier' &&
statement.expression.callee.property.name === 'run'
expression.callee.type === 'MemberExpression' &&
(isRuleTesterConstruction(expression.callee.object) ||
variableIdentifiers.has(expression.callee.object)) &&
expression.callee.property.type === 'Identifier' &&
expression.callee.property.name === 'run'
) {
runCalls.push(statement.expression);
runCalls.push(expression);
}
});
}

return runCalls;
},

/**
* Performs static analysis on an AST to try to find test cases
* @param {RuleContext} context The `context` variable for the source file itself
* @param {ASTNode} ast The `Program` node for the file.
* @returns {object} An object with `valid` and `invalid` keys containing a list of AST nodes corresponding to tests
*/
getTestInfo(context, ast) {
const runCalls = module.exports.checkStatementsForTestInfo(
context,
ast.body
);

return runCalls
.filter(
Expand Down
29 changes: 29 additions & 0 deletions tests/lib/rules/no-identical-tests.js
Original file line number Diff line number Diff line change
Expand Up @@ -196,5 +196,34 @@ ruleTester.run('no-identical-tests', rule, {
`,
errors: [ERROR_STRING_TEST],
},
{
code: `
var foo = new RuleTester();

function testOperator(operator) {
foo.run('foo', bar, {
valid: [
\`$\{operator}\`,
\`$\{operator}\`,
],
invalid: []
});
}
`,
output: `
var foo = new RuleTester();

function testOperator(operator) {
foo.run('foo', bar, {
valid: [
\`$\{operator}\`,
],
invalid: []
});
}
`,
parserOptions: { ecmaVersion: 2015 },
errors: [{ messageId: 'identical', type: 'TemplateLiteral' }],
},
],
});
30 changes: 30 additions & 0 deletions tests/lib/rules/test-case-property-ordering.js
Original file line number Diff line number Diff line change
Expand Up @@ -172,5 +172,35 @@ ruleTester.run('test-case-property-ordering', rule, {
},
],
},
{
code: `
var tester = new RuleTester();

describe('my tests', function() {
tester.run('foo', bar, {
valid: [
{\ncode: "foo",\noutput: "",\nerrors: ["baz"],\nparserOptions: "",\n},
]
});
});
`,
output: `
var tester = new RuleTester();

describe('my tests', function() {
tester.run('foo', bar, {
valid: [
{\ncode: "foo",\noutput: "",\nparserOptions: "",\nerrors: ["baz"],\n},
]
});
});
`,
errors: [
{
message:
'The properties of a test case should be placed in a consistent order: [code, output, parserOptions, errors].',
},
],
},
],
});