Language service extensibility

tests/cases/fourslash/server/ngProxy1.ts

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+/// <reference path="../fourslash.ts"/>
+
+// @Filename: tsconfig.json
+//// {
+////     "compilerOptions": {
+////         "plugins": [
+////             { "name": "quickinfo-augmeneter", "message": "hello world" }
+////         ]
+////     },
+////     "files": ["a.ts"]
+//// }
+
+// @Filename: a.ts
+//// let x = [1, 2];
+//// x/**/
+//// 
+
+goTo.marker();
+verify.quickInfoIs('Proxied x: number[]hello world');

tests/cases/fourslash/server/ngProxy2.ts

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+/// <reference path="../fourslash.ts"/>
+
+// @Filename: tsconfig.json
+//// {
+////     "compilerOptions": {
+////         "plugins": [
+////             { "name": "invalidmodulename" }
+////         ]
+////     },
+////     "files": ["a.ts"]
+//// }
+
+// @Filename: a.ts
+//// let x = [1, 2];
+//// x/**/
+//// 
+
+// LS shouldn't crash/fail if a plugin fails to load
+goTo.marker();
+verify.quickInfoIs('let x: number[]');

tests/cases/fourslash/server/ngProxy3.ts

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+/// <reference path="../fourslash.ts"/>
+
+// @Filename: tsconfig.json
+//// {
+////     "compilerOptions": {
+////         "plugins": [
+////             { "name": "create-thrower" }
+////         ]
+////     },
+////     "files": ["a.ts"]
+//// }
+
+// @Filename: a.ts
+//// let x = [1, 2];
+//// x/**/
+//// 
+
+// LS shouldn't crash/fail if a plugin fails to init correctly
+goTo.marker();
+verify.quickInfoIs('let x: number[]');

tests/cases/fourslash/server/ngProxy4.ts

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+/// <reference path="../fourslash.ts"/>
+
+// @Filename: tsconfig.json
+//// {
+////     "compilerOptions": {
+////         "plugins": [
+////             { "name": "diagnostic-adder" }
+////         ]
+////     },
+////     "files": ["a.ts"]
+//// }
+
+// @Filename: a.ts
+//// let x = [1, 2];
+//// x/**/
+//// 
+
+// Test adding an error message
+goTo.marker();
+verify.numberOfErrorsInCurrentFile(1);