Simplify use-t to only check the first parameter

Author: novemberborn

docs/rules/use-t.md

@@ -12,14 +12,6 @@ const test = require('ava');
 test('foo', foo => { // Incorrect name
 	t.pass();
 });
-
-test('bar', (t, bar) => { // too many arguments
-	t.pass();
-});
-
-test('baz', (bar, t) => { // too many arguments
-	t.pass();
-});
 ```
 
 ### Pass

rules/use-t.js

@@ -18,16 +18,11 @@ const create = context => {
 
 			const functionArg = node.arguments[functionArgIndex];
 
-			if (!(functionArg && functionArg.params && functionArg.params.length > 0)) {
+			if (!functionArg || !functionArg.params || functionArg.params.length === 0) {
 				return;
 			}
 
-			if (functionArg.params.length > 1) {
-				context.report({
-					node,
-					message: 'Test should only have one parameter named `t`.'
-				});
-			} else if (functionArg.params[0].name !== 't') {
+			if (functionArg.params[0].name !== 't') {
 				context.report({
 					node,
 					message: 'Test parameter should be named `t`.'

test/use-t.js

@@ -15,10 +15,6 @@ const parameterNotNamedTErrors = [{
 	message: 'Test parameter should be named `t`.'
 }];
 
-const tooManyParametersErrors = [{
-	message: 'Test should only have one parameter named `t`.'
-}];
-
 const header = 'const test = require(\'ava\');\n';
 
 ruleTester.run('use-t', rule, {
@@ -27,7 +23,8 @@ ruleTester.run('use-t', rule, {
 		header + 'test(() => {});',
 		header + 'test(t => {});',
 		header + 'test.cb(t => {});',
-		// Header + 'test("test name", t => {});',
+		header + 'test("test name", t => {});',
+		header + 'test((t, foo) => {});',
 		header + 'test(function (t) {});',
 		header + 'test(testFunction);',
 		header + 'test.todo("test name");',
@@ -53,18 +50,6 @@ ruleTester.run('use-t', rule, {
 		{
 			code: header + 'test(function (foo) {});',
 			errors: parameterNotNamedTErrors
-		},
-		{
-			code: header + 'test((t, foo) => {});',
-			errors: tooManyParametersErrors
-		},
-		{
-			code: header + 'test((foo, t) => {});',
-			errors: tooManyParametersErrors
-		},
-		{
-			code: header + 'test("test name", (t, foo) => {});',
-			errors: tooManyParametersErrors
 		}
 	]
 });