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add unit test

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Justin Bay
2017-04-21 00:27:36 -04:00
parent 8ee5610691
commit 1f815b6367
2 changed files with 66 additions and 39 deletions
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104
src/harness/unittests/transform.ts
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@@ -3,48 +3,74 @@
namespace ts {
describe("TransformAPI", () => {
function transformsCorrectly(name: string, source: string, transformers: TransformerFactory<SourceFile>[]) {
it(name, () => {
Harness.Baseline.runBaseline(`transformApi/transformsCorrectly.${name}.js`, () => {
const transformed = transform(createSourceFile("source.ts", source, ScriptTarget.ES2015), transformers);
const printer = createPrinter({ newLine: NewLineKind.CarriageReturnLineFeed }, {
onEmitNode: transformed.emitNodeWithNotification,
substituteNode: transformed.substituteNode
});
const result = printer.printBundle(createBundle(transformed.transformed));
transformed.dispose();
return result;
});
function replaceUndefinedWithVoid0(context: ts.TransformationContext) {
const previousOnSubstituteNode = context.onSubstituteNode;
context.enableSubstitution(SyntaxKind.Identifier);
context.onSubstituteNode = (hint, node) => {
node = previousOnSubstituteNode(hint, node);
if (hint === EmitHint.Expression && node.kind === SyntaxKind.Identifier && (<Identifier>node).text === "undefined") {
node = createPartiallyEmittedExpression(
addSyntheticTrailingComment(
setTextRange(
createVoidZero(),
node),
SyntaxKind.MultiLineCommentTrivia, "undefined"));
}
return node;
};
return (file: ts.SourceFile) => file;
}
function replaceIdentifiersNamedOldNameWithNewName(context: ts.TransformationContext) {
const previousOnSubstituteNode = context.onSubstituteNode;
context.enableSubstitution(SyntaxKind.Identifier);
context.onSubstituteNode = (hint, node) => {
node = previousOnSubstituteNode(hint, node);
if (node.kind === SyntaxKind.Identifier && (<Identifier>node).text === "oldName") {
node = setTextRange(createIdentifier("newName"), node);
}
return node;
};
return (file: ts.SourceFile) => file;
}
function transformSourceFile(sourceText: string, transformers: TransformerFactory<SourceFile>[]) {
const transformed = transform(createSourceFile("source.ts", sourceText, ScriptTarget.ES2015), transformers);
const printer = createPrinter({ newLine: NewLineKind.CarriageReturnLineFeed }, {
onEmitNode: transformed.emitNodeWithNotification,
substituteNode: transformed.substituteNode
});
const result = printer.printBundle(createBundle(transformed.transformed));
transformed.dispose();
return result;
}
function testBaseline(testName: string, test: () => string) {
it(testName, () => {
Harness.Baseline.runBaseline(`transformApi/transformsCorrectly.${testName}.js`, test);
});
}
transformsCorrectly("substitution", `
var a = undefined;
`, [
context => {
const previousOnSubstituteNode = context.onSubstituteNode;
context.enableSubstitution(SyntaxKind.Identifier);
context.onSubstituteNode = (hint, node) => {
node = previousOnSubstituteNode(hint, node);
if (hint === EmitHint.Expression && node.kind === SyntaxKind.Identifier && (<Identifier>node).text === "undefined") {
node = createPartiallyEmittedExpression(
addSyntheticTrailingComment(
setTextRange(
createVoidZero(),
node),
SyntaxKind.MultiLineCommentTrivia, "undefined"));
}
return node;
};
return file => file;
}
]);
testBaseline("substitution", () => {
return transformSourceFile(`var a = undefined;`, [replaceUndefinedWithVoid0]);
});
// https://github.com/Microsoft/TypeScript/issues/15192
transformsCorrectly("types", `let a: () => void`, [
context => file => visitNode(file, function visitor(node: Node): VisitResult<Node> {
return visitEachChild(node, visitor, context);
})
]);
testBaseline("types", () => {
return transformSourceFile(`let a: () => void`, [
context => file => visitNode(file, function visitor(node: Node): VisitResult<Node> {
return visitEachChild(node, visitor, context);
})
]);
});
testBaseline("fromTranspileModule", () => {
return ts.transpileModule(`var oldName = undefined;`, {
transformers: {
before: [replaceUndefinedWithVoid0],
after: [replaceIdentifiersNamedOldNameWithNewName]
}
}).outputText;
});
});
}