Stop using expensive directoryExists in unit/rwc tests where it does not matter (microsoft#19486)

weswigham · web-flow · commit 1a6022d6dd43 · 2017-10-25T17:04:41.000-07:00
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
@@ -1196,6 +1196,9 @@ namespace Harness {
                 traceResults = [];
                 compilerHost.trace = text => traceResults.push(text);
             }
+            else {
+                compilerHost.directoryExists = () => true; // This only visibly affects resolution traces, so to save time we always return true where possible
+            }
             const program = ts.createProgram(programFileNames, options, compilerHost);
 
             const emitResult = program.emit();

Original file line number	Diff line number	Diff line change
`@@ -1196,6 +1196,9 @@ namespace Harness {`
`1196`	`1196`	`traceResults = [];`
`1197`	`1197`	`compilerHost.trace = text => traceResults.push(text);`
`1198`	`1198`	`}`
	`1199`	`+ else {`
	`1200`	`+ compilerHost.directoryExists = () => true; // This only visibly affects resolution traces, so to save time we always return true where possible`
	`1201`	`+ }`
`1199`	`1202`	`const program = ts.createProgram(programFileNames, options, compilerHost);`
`1200`	`1203`
`1201`	`1204`	`const emitResult = program.emit();`