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test: refactor (#97)
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‎test/__snapshots__/loader.test.js.snap

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// Jest Snapshot v1, https://goo.gl/fbAQLP
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exports[`source-map-loader should leave normal files untouched: css 1`] = `"without SourceMap"`;
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exports[`source-map-loader should leave normal files untouched: errors 1`] = `Array []`;
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exports[`source-map-loader should leave normal files untouched: warnings 1`] = `Array []`;
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exports[`source-map-loader should process external SourceMaps (external sources): css 1`] = `
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"with SourceMap
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// comment"
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`;
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exports[`source-map-loader should process external SourceMaps (external sources): errors 1`] = `Array []`;
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exports[`source-map-loader should process external SourceMaps (external sources): map 1`] = `
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Object {
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"file": "external-source-map2.js",
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"mappings": "AAAA",
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"sources": Array [
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"/test/fixtures/external-source-map2.txt - (normalized for test)",
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],
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"sourcesContent": Array [
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"with SourceMap",
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],
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"version": 3,
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}
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`;
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exports[`source-map-loader should process external SourceMaps (external sources): warnings 1`] = `Array []`;
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exports[`source-map-loader should process external SourceMaps: css 1`] = `
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"with SourceMap
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// comment"
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`;
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exports[`source-map-loader should process external SourceMaps: errors 1`] = `Array []`;
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exports[`source-map-loader should process external SourceMaps: map 1`] = `
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Object {
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"file": "external-source-map.js",
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"mappings": "AAAA",
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"sources": Array [
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"external-source-map.txt",
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],
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"sourcesContent": Array [
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"with SourceMap",
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],
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"version": 3,
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}
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`;
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exports[`source-map-loader should process external SourceMaps: warnings 1`] = `Array []`;
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exports[`source-map-loader should process inlined SourceMaps with charset: css 1`] = `
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"with SourceMap
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// comment"
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`;
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exports[`source-map-loader should process inlined SourceMaps with charset: errors 1`] = `Array []`;
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exports[`source-map-loader should process inlined SourceMaps with charset: map 1`] = `
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Object {
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"file": "charset-inline-source-map.js",
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"mappings": "AAAA",
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"sources": Array [
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"charset-inline-source-map.txt",
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],
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"sourcesContent": Array [
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"with SourceMap",
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],
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"version": 3,
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}
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`;
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exports[`source-map-loader should process inlined SourceMaps with charset: warnings 1`] = `Array []`;
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exports[`source-map-loader should process inlined SourceMaps: css 1`] = `
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"with SourceMap
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// comment"
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`;
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exports[`source-map-loader should process inlined SourceMaps: errors 1`] = `Array []`;
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exports[`source-map-loader should process inlined SourceMaps: map 1`] = `
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Object {
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"file": "inline-source-map.js",
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"mappings": "AAAA",
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"sources": Array [
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"inline-source-map.txt",
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],
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"sourcesContent": Array [
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"with SourceMap",
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],
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"version": 3,
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}
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`;
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exports[`source-map-loader should process inlined SourceMaps: warnings 1`] = `Array []`;
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exports[`source-map-loader should skip invalid base64 SourceMap: css 1`] = `
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"without SourceMap
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// @sourceMappingURL=data:application/source-map;base64,\\"something invalid\\"
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// comment"
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`;
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exports[`source-map-loader should skip invalid base64 SourceMap: errors 1`] = `Array []`;
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exports[`source-map-loader should skip invalid base64 SourceMap: warnings 1`] = `Array []`;
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exports[`source-map-loader should support absolute sourceRoot paths in sourcemaps: css 1`] = `
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"with SourceMap
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// comment"
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`;
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exports[`source-map-loader should support absolute sourceRoot paths in sourcemaps: errors 1`] = `Array []`;
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exports[`source-map-loader should support absolute sourceRoot paths in sourcemaps: map 1`] = `
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Object {
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"file": "absolute-sourceRoot-source-map.js",
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"mappings": "AAAA",
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"sources": Array [
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"/test/fixtures/absolute-sourceRoot-source-map.txt - (normalized for test)",
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],
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"sourcesContent": Array [
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"with SourceMap
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// comment",
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],
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"version": 3,
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}
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`;
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exports[`source-map-loader should support absolute sourceRoot paths in sourcemaps: warnings 1`] = `Array []`;
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exports[`source-map-loader should support relative sourceRoot paths in sourcemaps: css 1`] = `
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"with SourceMap
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// comment"
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`;
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exports[`source-map-loader should support relative sourceRoot paths in sourcemaps: errors 1`] = `Array []`;
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exports[`source-map-loader should support relative sourceRoot paths in sourcemaps: map 1`] = `
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Object {
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"file": "relative-sourceRoot-source-map.js",
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"mappings": "AAAA",
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"sources": Array [
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"/test/fixtures/data/relative-sourceRoot-source-map.txt - (normalized for test)",
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],
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"sourcesContent": Array [
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"with SourceMap
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// comment",
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],
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"version": 3,
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}
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`;
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exports[`source-map-loader should support relative sourceRoot paths in sourcemaps: warnings 1`] = `Array []`;
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exports[`source-map-loader should use last SourceMap directive: css 1`] = `
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"with SourceMap
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anInvalidDirective = \\"\\\\n/*# sourceMappingURL=data:application/json;base64,\\"+btoa(unescape(encodeURIComponent(JSON.stringify(sourceMap))))+\\" */\\";
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// comment"
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`;
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exports[`source-map-loader should use last SourceMap directive: errors 1`] = `Array []`;
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exports[`source-map-loader should use last SourceMap directive: map 1`] = `
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Object {
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"file": "inline-source-map.js",
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"mappings": "AAAA",
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"sources": Array [
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"inline-source-map.txt",
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],
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"sourcesContent": Array [
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"with SourceMap",
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],
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"version": 3,
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}
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`;
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exports[`source-map-loader should use last SourceMap directive: warnings 1`] = `Array []`;
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exports[`source-map-loader should warn on invalid SourceMap: css 1`] = `
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"with SourceMap
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//#sourceMappingURL=invalid-source-map.map
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// comment"
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`;
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exports[`source-map-loader should warn on invalid SourceMap: errors 1`] = `Array []`;
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exports[`source-map-loader should warn on invalid SourceMap: warnings 1`] = `
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Array [
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"ModuleWarning: Module Warning (from \`replaced original path\`):
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(Emitted value instead of an instance of Error) Cannot parse SourceMap 'invalid-source-map.map': SyntaxError: Unexpected string in JSON at position 102",
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]
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`;
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exports[`source-map-loader should warn on invalid base64 SourceMap: css 1`] = `
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"without SourceMap
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// @sourceMappingURL=data:application/source-map;base64,invalid/base64=
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// comment"
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`;
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exports[`source-map-loader should warn on invalid base64 SourceMap: errors 1`] = `Array []`;
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exports[`source-map-loader should warn on invalid base64 SourceMap: warnings 1`] = `
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Array [
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"ModuleWarning: Module Warning (from \`replaced original path\`):
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(Emitted value instead of an instance of Error) Cannot parse inline SourceMap: data:application/source-map;base64,invalid/base64=",
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]
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`;
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exports[`source-map-loader should warn on missing SourceMap: css 1`] = `
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"with SourceMap
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//#sourceMappingURL=missing-source-map.map
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// comment"
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`;
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exports[`source-map-loader should warn on missing SourceMap: errors 1`] = `Array []`;
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exports[`source-map-loader should warn on missing SourceMap: warnings 1`] = `
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Array [
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"ModuleWarning: Module Warning (from \`replaced original path\`):
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(Emitted value instead of an instance of Error) Cannot find SourceMap 'missing-source-map.map': Error: Can't resolve './missing-source-map.map' in '/test/fixtures'",
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]
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`;
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exports[`source-map-loader should warn on missing source file: css 1`] = `
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"with SourceMap
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// comment"
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`;
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exports[`source-map-loader should warn on missing source file: errors 1`] = `Array []`;
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exports[`source-map-loader should warn on missing source file: map 1`] = `
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Object {
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"file": "missing-source-map2.js",
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"mappings": "AAAA",
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"sources": Array [
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"missing-source-map2.txt",
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],
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"sourcesContent": Array [
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null,
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],
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"version": 3,
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}
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`;
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exports[`source-map-loader should warn on missing source file: warnings 1`] = `
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Array [
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"ModuleWarning: Module Warning (from \`replaced original path\`):
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(Emitted value instead of an instance of Error) Cannot find source file 'missing-source-map2.txt': Error: Can't resolve './missing-source-map2.txt' in '/test/fixtures'",
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]
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`;

‎test/helpers/compile.js

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export default (compiler) => {
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return new Promise((resolve, reject) => {
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compiler.run((error, stats) => {
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if (error) {
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return reject(error);
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}
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return resolve(stats);
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});
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});
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};

‎test/helpers/execute.js

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import Module from 'module';
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import path from 'path';
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const parentModule = module;
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export default (code) => {
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const resource = 'test.js';
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const module = new Module(resource, parentModule);
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// eslint-disable-next-line no-underscore-dangle
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module.paths = Module._nodeModulePaths(
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path.resolve(__dirname, '../fixtures')
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);
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module.filename = resource;
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// eslint-disable-next-line no-underscore-dangle
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module._compile(code, resource);
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return module.exports;
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};

‎test/helpers/getCodeFromBundle.js

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import vm from 'vm';
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import readAsset from './readAsset';
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function getCodeFromBundle(stats, compiler, asset) {
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let code = null;
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if (
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stats &&
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stats.compilation &&
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stats.compilation.assets &&
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stats.compilation.assets[asset || 'main.bundle.js']
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) {
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code = readAsset(asset || 'main.bundle.js', compiler, stats);
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}
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if (!code) {
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throw new Error("Can't find compiled code");
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}
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const result = vm.runInNewContext(
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`${code};\nmodule.exports = sourceMapLoaderExport;`,
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{
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module: {},
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}
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);
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// eslint-disable-next-line no-underscore-dangle
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return result.__esModule ? result.default : result;
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}
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export default getCodeFromBundle;

‎test/helpers/getCompiler.js

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import path from 'path';
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import webpack from 'webpack';
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import { createFsFromVolume, Volume } from 'memfs';
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export default (fixture, loaderOptions = {}, config = {}) => {
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const fullConfig = {
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mode: 'development',
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devtool: config.devtool || 'source-map',
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context: path.resolve(__dirname, '../fixtures'),
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entry: path.resolve(__dirname, '../fixtures', fixture),
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output: {
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path: path.resolve(__dirname, '../outputs'),
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filename: '[name].bundle.js',
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chunkFilename: '[name].chunk.js',
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library: 'sourceMapLoaderExport',
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},
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module: {
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rules: [
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{
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test: /\.js/i,
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rules: [
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{
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loader: require.resolve('./testLoader'),
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},
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{
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loader: path.resolve(__dirname, '../../src'),
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options: loaderOptions || {},
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},
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],
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},
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],
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},
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plugins: [],
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...config,
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};
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const compiler = webpack(fullConfig);
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if (!config.outputFileSystem) {
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const outputFileSystem = createFsFromVolume(new Volume());
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// Todo remove when we drop webpack@4 support
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outputFileSystem.join = path.join.bind(path);
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compiler.outputFileSystem = outputFileSystem;
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}
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return compiler;
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};

‎test/helpers/getErrors.js

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import normalizeErrors from './normalizeErrors';
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export default (stats) => {
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return normalizeErrors(stats.compilation.errors.sort());
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};

‎test/helpers/getWarnings.js

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import normalizeErrors from './normalizeErrors';
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export default (stats) => {
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return normalizeErrors(stats.compilation.warnings.sort());
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};

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