30 lines
1.4 KiB
TypeScript
30 lines
1.4 KiB
TypeScript
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/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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/**
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* Verify that all functions in the output have a unique name.
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* @param output Compiler output.
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* @param functionNamePattern Only match function whose names match this pattern.
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* Will be converted into a regular expression.
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* @param expectedCount Expected number of functions.
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*/
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export function verifyUniqueFunctions(
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output: string, functionNamePattern?: string, expectedCount?: number): boolean {
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const pattern = functionNamePattern ? new RegExp(functionNamePattern) : null;
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const allTemplateFunctionsNames = (output.match(/function ([^\s(]+)/g) || [])
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.map(match => match.slice(9))
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.filter(name => !pattern || pattern.test(name));
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const uniqueTemplateFunctionNames = new Set(allTemplateFunctionsNames);
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const lengthMatches = allTemplateFunctionsNames.length === uniqueTemplateFunctionNames.size;
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const expectedCountMatches =
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(expectedCount == null ? allTemplateFunctionsNames.length > 0 :
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allTemplateFunctionsNames.length === expectedCount);
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return lengthMatches && expectedCountMatches &&
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allTemplateFunctionsNames.every(name => uniqueTemplateFunctionNames.has(name));
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}
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