Fix error baselines for empty files (#1014)

Author: jakebailey

internal/testutil/tsbaseline/error_baseline.go

@@ -152,8 +152,7 @@ func iterateErrorBaseline(t *testing.T, inputFiles []*harnessutil.TestFile, inpu
 
 	// 'merge' the lines of each input file with any errors associated with it
 	dupeCase := map[string]int{}
-	nonEmptyFiles := core.Filter(inputFiles, func(f *harnessutil.TestFile) bool { return len(f.Content) > 0 })
-	for _, inputFile := range nonEmptyFiles {
+	for _, inputFile := range inputFiles {
 		// Filter down to the errors in the file
 		fileErrors := core.Filter(diagnostics, func(e *ast.Diagnostic) bool {
 			return e.File() != nil &&

testdata/baselines/reference/submodule/compiler/checkJsdocTypeTagOnExportAssignment1.errors.txt

@@ -1,6 +1,8 @@
 a.js(8,16): error TS2739: Type '{ c: boolean; }' is missing the following properties from type 'Foo': a, b
 
 
+==== checkJsdocTypeTagOnExportAssignment1.js (0 errors) ====
+    
 ==== a.js (1 errors) ====
     /**
      * @typedef {Object} Foo

testdata/baselines/reference/submodule/compiler/checkJsdocTypeTagOnExportAssignment2.errors.txt

@@ -1,6 +1,8 @@
 b.js(2,16): error TS2739: Type '{ c: boolean; }' is missing the following properties from type 'Foo': a, b
 
 
+==== checkJsdocTypeTagOnExportAssignment2.js (0 errors) ====
+    
 ==== a.ts (0 errors) ====
     export interface Foo {
         a: number;

testdata/baselines/reference/submodule/compiler/checkJsdocTypeTagOnExportAssignment3.errors.txt

@@ -1,6 +1,8 @@
 a.js(10,16): error TS2739: Type '{ c: number; }' is missing the following properties from type 'Foo': a, b
 
 
+==== checkJsdocTypeTagOnExportAssignment3.js (0 errors) ====
+    
 ==== a.js (1 errors) ====
     /**
      * @typedef {Object} Foo

testdata/baselines/reference/submodule/compiler/checkJsdocTypeTagOnExportAssignment4.errors.txt

@@ -1,6 +1,8 @@
 a.js(6,16): error TS2352: Conversion of type 'string' to type 'number' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.
 
 
+==== checkJsdocTypeTagOnExportAssignment4.js (0 errors) ====
+    
 ==== a.js (1 errors) ====
     /**
      * @typedef {number} Foo

testdata/baselines/reference/submodule/compiler/duplicatePackage_globalMerge.errors.txt

@@ -20,6 +20,8 @@
 
 ==== /tests/node_modules/@types/react/package.json (0 errors) ====
     { "name": "@types/react", "version": "16.4.6" }
+==== /tests/node_modules/@types/react/index.d.ts (0 errors) ====
+    
 ==== /node_modules/@types/react/package.json (0 errors) ====
     { "name": "@types/react", "version": "16.4.6" }
 ==== /node_modules/@types/react/index.d.ts (1 errors) ====

testdata/baselines/reference/submodule/compiler/duplicatePackage_globalMerge.errors.txt.diff

@@ -13,4 +13,10 @@
     import js from "./js"; // OK because it's an untyped module.
                    ~~~~~~
 !!! error TS2307: Cannot find module './js' or its corresponding type declarations.
+    
+==== /tsx.tsx (0 errors) ====
+    
+==== /jsx.jsx (0 errors) ====
+    
+==== /js.js (0 errors) ====
 

testdata/baselines/reference/submodule/compiler/moduleResolutionWithExtensions_notSupported.errors.txt

@@ -21,12 +21,8 @@
 -!!! error TS6142: Module './jsx' was resolved to '/jsx.jsx', but '--jsx' is not set.
 +!!! error TS2307: Cannot find module './jsx' or its corresponding type declarations.
      import js from "./js"; // OK because it's an untyped module.
--    
--==== /tsx.tsx (0 errors) ====
--    
--==== /jsx.jsx (0 errors) ====
--    
--==== /js.js (0 errors) ====
 +                   ~~~~~~
 +!!! error TS2307: Cannot find module './js' or its corresponding type declarations.
+     
+ ==== /tsx.tsx (0 errors) ====
 

testdata/baselines/reference/submodule/compiler/moduleResolutionWithExtensions_notSupported.errors.txt.diff

@@ -5,4 +5,6 @@
     import jsx from "./jsx";
                     ~~~~~~~
 !!! error TS2306: File '/jsx.jsx' is not a module.
+    
+==== /jsx.jsx (0 errors) ====