add toThrow expectation

tests/Features/Expect/toThrow.php

@@ -0,0 +1,60 @@
+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('passes', function () {
+    expect(function () { throw new RuntimeException(); })->toThrow(RuntimeException::class);
+    expect(function () { throw new RuntimeException(); })->toThrow(Exception::class);
+    expect(function () { throw new RuntimeException(); })->toThrow(function (RuntimeException $e) {});
+    expect(function () { throw new RuntimeException('actual message'); })->toThrow(function (Exception $e) {
+        expect($e->getMessage())->toBe('actual message');
+    });
+    expect(function () {})->not->toThrow(Exception::class);
+    expect(function () { throw new RuntimeException('actual message'); })->toThrow('actual message');
+    expect(function () { throw new Exception(); })->not->toThrow(RuntimeException::class);
+    expect(function () { throw new RuntimeException('actual message'); })->toThrow(RuntimeException::class, 'actual message');
+    expect(function () { throw new RuntimeException('actual message'); })->toThrow(function (RuntimeException $e) {}, 'actual message');
+});
+
+test('failures 1', function () {
+    expect(function () {})->toThrow(RuntimeException::class);
+})->throws(ExpectationFailedException::class, 'Exception "' . RuntimeException::class . '" not thrown.');
+
+test('failures 2', function () {
+    expect(function () {})->toThrow(function (RuntimeException $e) {});
+})->throws(ExpectationFailedException::class, 'Exception "' . RuntimeException::class . '" not thrown.');
+
+test('failures 3', function () {
+    expect(function () { throw new Exception(); })->toThrow(function (RuntimeException $e) {});
+})->throws(ExpectationFailedException::class, 'Failed asserting that Exception Object');
+
+test('failures 4', function () {
+    expect(function () { throw new Exception('actual message'); })
+        ->toThrow(function (Exception $e) {
+            expect($e->getMessage())->toBe('expected message');
+        });
+})->throws(ExpectationFailedException::class, 'Failed asserting that two strings are identical');
+
+test('failures 5', function () {
+    expect(function () { throw new Exception('actual message'); })->toThrow('expected message');
+})->throws(ExpectationFailedException::class, 'Failed asserting that \'actual message\' contains "expected message".');
+
+test('failures 6', function () {
+    expect(function () {})->toThrow('actual message');
+})->throws(ExpectationFailedException::class, 'Exception with message "actual message" not thrown');
+
+test('failures 7', function () {
+    expect(function () { throw new RuntimeException('actual message'); })->toThrow(RuntimeException::class, 'expected message');
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect(function () { throw new RuntimeException(); })->not->toThrow(RuntimeException::class);
+})->throws(ExpectationFailedException::class);
+
+test('closure missing parameter', function () {
+    expect(function () {})->toThrow(function () {});
+})->throws(LogicException::class, 'The "toThrow" closure must have a single parameter type-hinted as the class string');
+
+test('closure missing type-hint', function () {
+    expect(function () {})->toThrow(function ($e) {});
+})->throws(LogicException::class, 'The "toThrow" closure\'s parameter must be type-hinted as the class string');