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Fix IntrospectionProcessor tests that were not validating the code under test (#1896)
Three tests in IntrospectionProcessorTest (testLevelTooLow, testLevelEqual, testLevelHigher) aren't actually testing anything. Because `$expected = $input` is a reference, the changes made to `$expected['extra']` are made to $input and carried forward to $actual. You can demonstrate this by adding a `return $record` at the immediate start of `InstrospectionProcessor::__invoke` -- the tests still pass despite bypassing all the code.
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@@ -68,7 +68,7 @@ class IntrospectionProcessorTest extends TestCase
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{
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$input = $this->getRecord(Level::Debug);
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$expected = $input;
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$expected = clone $input;
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$processor = new IntrospectionProcessor(Level::Critical);
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$actual = $processor($input);
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@@ -80,7 +80,7 @@ class IntrospectionProcessorTest extends TestCase
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{
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$input = $this->getRecord(Level::Critical);
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$expected = $input;
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$expected = clone $input;
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$expected['extra'] = [
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'file' => null,
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'line' => null,
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@@ -99,7 +99,7 @@ class IntrospectionProcessorTest extends TestCase
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{
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$input = $this->getRecord(Level::Emergency);
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$expected = $input;
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$expected = clone $input;
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$expected['extra'] = [
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'file' => null,
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'line' => null,
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