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declarations.ts
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declarations.ts
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import test from 'ava';
import type { ExecutionContext } from 'ava';
import { rollup } from 'rollup';
import typescript from '..';
import { getCode } from '../../../util/test';
test.beforeEach(() => process.chdir(__dirname));
// eslint-disable-next-line no-console
const onwarn = (warning: any) => console.warn(warning.toString());
test.serial('supports creating declaration files', async (t) => {
const bundle = await rollup({
input: 'fixtures/basic/main.ts',
plugins: [
typescript({
tsconfig: 'fixtures/basic/tsconfig.json',
outDir: 'fixtures/basic/dist',
declaration: true
})
],
onwarn
});
const output = await getCode(bundle, { format: 'es', dir: 'fixtures/basic/dist' }, true);
const declaration = output[1].source as string;
t.deepEqual(
output.map((out) => out.fileName),
['main.js', 'main.d.ts']
);
t.true(declaration.includes('declare const answer = 42;'), declaration);
});
test.serial('supports creating declaration files in subfolder', async (t) => {
const bundle = await rollup({
input: 'fixtures/basic/main.ts',
plugins: [
typescript({
tsconfig: 'fixtures/basic/tsconfig.json',
outDir: 'fixtures/basic/dist/types',
declaration: true,
declarationMap: true
})
],
onwarn
});
const output = await getCode(bundle, { format: 'es', dir: 'fixtures/basic/dist' }, true);
const declaration = output[1].source as string;
t.deepEqual(
output.map((out) => out.fileName),
['main.js', 'types/main.d.ts', 'types/main.d.ts.map']
);
t.true(declaration.includes('declare const answer = 42;'), declaration);
t.true(declaration.includes('//# sourceMappingURL=main.d.ts.map'), declaration);
});
test.serial('supports creating declarations with non-default rootDir', async (t) => {
const bundle = await rollup({
input: 'fixtures/declaration-root-dir/src/main.ts',
plugins: [
typescript({
tsconfig: 'fixtures/declaration-root-dir/tsconfig.json'
})
],
onwarn
});
const output = await getCode(
bundle,
{ format: 'es', dir: 'fixtures/declaration-root-dir/lib' },
true
);
t.deepEqual(
output.map((out) => out.fileName),
['main.js', 'main.d.ts']
);
});
test.serial('supports creating declaration files for interface only source file', async (t) => {
const bundle = await rollup({
input: 'fixtures/export-interface-only/main.ts',
plugins: [
typescript({
tsconfig: 'fixtures/export-interface-only/tsconfig.json',
declarationDir: 'fixtures/export-interface-only/dist/types',
declaration: true,
declarationMap: true
})
],
onwarn
});
const output = await getCode(
bundle,
{ format: 'es', dir: 'fixtures/export-interface-only/dist' },
true
);
const declaration = output[1].source as string;
t.deepEqual(
output.map((out) => out.fileName),
[
'main.js',
'types/interface.d.ts',
'types/interface.d.ts.map',
'types/main.d.ts',
'types/main.d.ts.map'
]
);
t.true(declaration.includes('export interface ITest'), declaration);
t.true(declaration.includes('//# sourceMappingURL=interface.d.ts.map'), declaration);
});
test.serial('supports creating declaration files in declarationDir', async (t) => {
const bundle = await rollup({
input: 'fixtures/basic/main.ts',
plugins: [
typescript({
tsconfig: 'fixtures/basic/tsconfig.json',
declarationDir: 'fixtures/basic/dist/types',
declaration: true
})
],
onwarn
});
const output = await getCode(bundle, { format: 'es', dir: 'fixtures/basic/dist' }, true);
const declaration = output[1].source as string;
t.deepEqual(
output.map((out) => out.fileName),
['main.js', 'types/main.d.ts']
);
t.true(declaration.includes('declare const answer = 42;'), declaration);
});
async function ensureOutDirWhenCreatingDeclarationFiles(
t: ExecutionContext,
compilerOptionName: string
) {
const bundle = await rollup({
input: 'fixtures/basic/main.ts',
plugins: [
typescript({
tsconfig: 'fixtures/basic/tsconfig.json',
[compilerOptionName]: true
})
],
onwarn
});
const caughtError = await t.throwsAsync(() =>
getCode(bundle, { format: 'es', dir: 'fixtures/basic/dist' }, true)
);
t.true(
caughtError!.message.includes(
`'outDir' or 'declarationDir' must be specified to generate declaration files`
),
`Unexpected error message: ${caughtError!.message}`
);
}
test.serial('ensures outDir is set when creating declaration files (declaration)', async (t) => {
await ensureOutDirWhenCreatingDeclarationFiles(t, 'declaration');
});
test.serial('ensures outDir is set when creating declaration files (composite)', async (t) => {
await ensureOutDirWhenCreatingDeclarationFiles(t, 'composite');
});