JS: Add test

Author: asgerf

javascript/ql/test/query-tests/Diagnostics/ExtractionErrors.expected

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+| bad1.js:1:7:1:7 | Error: Unexpected token | Extraction failed in bad1.js with error Error: Unexpected token | 2 |
+| bad2.ts:1:11:1:11 | Error: Expression expected. | Extraction failed in bad2.ts with error Error: Expression expected. | 2 |
+| bad2.ts:1:13:1:13 | Error: Expression expected. | Extraction failed in bad2.ts with error Error: Expression expected. | 2 |
+| bad3.html:2:11:2:11 | Error: Unexpected token | Extraction failed in bad3.html with error Error: Unexpected token | 2 |

javascript/ql/test/query-tests/Diagnostics/ExtractionErrors.qlref

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+Diagnostics/ExtractionErrors.ql

javascript/ql/test/query-tests/Diagnostics/SuccessfullyExtractedFiles.expected

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+| contains-template.js:0:0:0:0 | contains-template.js |  |
+| good1.js:0:0:0:0 | good1.js |  |
+| good2.ts:0:0:0:0 | good2.ts |  |
+| good3.html:0:0:0:0 | good3.html |  |

javascript/ql/test/query-tests/Diagnostics/SuccessfullyExtractedFiles.qlref

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+Diagnostics/SuccessfullyExtractedFiles.ql

javascript/ql/test/query-tests/Diagnostics/bad1.js

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+let x x x;

javascript/ql/test/query-tests/Diagnostics/bad2.ts

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+const z = ??;

javascript/ql/test/query-tests/Diagnostics/bad3.html

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+<script>
+    let q q q q ; // error
+</script>

javascript/ql/test/query-tests/Diagnostics/contains-template.js

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+const obj = {
+    // Template where we can't parse `x x x` but surrounding file still OK
+    template: '<b [foo]="x x x"></a>'
+};

javascript/ql/test/query-tests/Diagnostics/good1.js

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+let x = 123;

javascript/ql/test/query-tests/Diagnostics/good2.ts

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+const y: string = "dfg";