Add missing waitUntil method to FakeInvokedProcess

src/Illuminate/Contracts/Process/InvokedProcess.php

@@ -61,4 +61,12 @@ public function latestErrorOutput();
      * @return \Illuminate\Process\ProcessResult
      */
     public function wait(?callable $output = null);
+
+    /**
+     * Wait until the given callback returns true.
+     *
+     * @param  callable|null  $output
+     * @return \Illuminate\Process\ProcessResult
+     */
+    public function waitUntil(?callable $output = null);
 }

src/Illuminate/Process/FakeInvokedProcess.php

@@ -286,6 +286,31 @@ public function wait(?callable $output = null)
         return $this->process->toProcessResult($this->command);
     }
 
+    /**
+     * Wait until the given callback returns true.
+     *
+     * @param  callable|null  $output
+     * @return \Illuminate\Contracts\Process\ProcessResult
+     */
+    public function waitUntil(?callable $output = null)
+    {
+        $this->outputHandler = $output ?: $this->outputHandler;
+
+        if (! $this->outputHandler) {
+            $this->remainingRunIterations = 0;
+
+            return $this->predictProcessResult();
+        }
+
+        while ($this->running() && ! call_user_func($this->outputHandler, 'out', $this->latestOutput())) {
+            //
+        }
+
+        $this->remainingRunIterations = 0;
+
+        return $this->process->toProcessResult($this->command);
+    }
+
     /**
      * Get the ultimate process result that will be returned by this "process".
      *

tests/Process/ProcessTest.php

@@ -765,6 +765,77 @@ public function testFakeInvokedProcessOutputWithLatestOutput()
         $this->assertEquals("ONE\nTWO\nTHREE\n", $output[2]);
     }
 
+    public function testFakeInvokedProcessWaitUntil()
+    {
+        $factory = new Factory;
+
+        $factory->fake(function () use ($factory) {
+            return $factory->describe()
+                ->output('WAITING')
+                ->output('READY')
+                ->output('DONE')
+                ->runsFor(iterations: 3);
+        });
+
+        $process = $factory->start('echo "WAITING"; sleep 1; echo "READY"; sleep 1; echo "DONE";');
+
+        $callbackInvoked = [];
+
+        $result = $process->waitUntil(function ($type, $buffer) use (&$callbackInvoked) {
+            $callbackInvoked[] = $buffer;
+            return str_contains($buffer, 'READY');
+        });
+
+        $this->assertInstanceOf(ProcessResult::class, $result);
+        $this->assertTrue($result->successful());
+        $this->assertContains("WAITING\n", $callbackInvoked);
+        $this->assertContains("READY\n", $callbackInvoked);
+    }
+
+    public function testFakeInvokedProcessWaitUntilWithNoCallback()
+    {
+        $factory = new Factory;
+
+        $factory->fake(function () use ($factory) {
+            return $factory->describe()
+                ->output('OUTPUT');
+        });
+
+        $process = $factory->start('echo "OUTPUT"');
+
+        $result = $process->waitUntil();
+
+        $this->assertInstanceOf(ProcessResult::class, $result);
+        $this->assertTrue($result->successful());
+        $this->assertEquals("OUTPUT\n", $result->output());
+    }
+
+    public function testFakeInvokedProcessWaitUntilStopsWhenConditionMet()
+    {
+        $factory = new Factory;
+
+        $factory->fake(function () use ($factory) {
+            return $factory->describe()
+                ->output('STEP1')
+                ->output('TARGET')
+                ->output('STEP3')
+                ->runsFor(iterations: 3);
+        });
+
+        $process = $factory->start('echo "STEP1"; sleep 1; echo "TARGET"; sleep 1; echo "STEP3";');
+
+        $callbackCount = 0;
+
+        $result = $process->waitUntil(function ($type, $buffer) use (&$callbackCount) {
+            $callbackCount++;
+            return str_contains($buffer, 'TARGET');
+        });
+
+        $this->assertInstanceOf(ProcessResult::class, $result);
+        $this->assertTrue($result->successful());
+        $this->assertEquals(2, $callbackCount);
+    }
+
     public function testBasicFakeAssertions()
     {
         $factory = new Factory;